+ of 2000 circuitos de eletrônica encontrados na web

1. A Combination Lock
2.  Residential Alarm
3. Proximity alarm
4. Enhanced 4 Digit Alarm Keypad
5. Modular Burglar Alarm
   
6. Electronic lock
   
7. Electronic door codelock (PIC16F84)
   
8. Moisture alarm
   
9. Fridge door alarm
   
10. Ultrasonic remote control & alarm system
11. Sun - Up Alarm
    
12. Wire loop alarm
    
13. Digital entry lock
    
14. Proximity switch
    
15. Toxic Gas Detector
16. LEVEL CROSSING
    
17. Door knob alarm (PDF)
    
18. Water seepage alarm (PDF)
    
19. Micro-power over temperature alarm (PDF)
    
20. Personal silent alarm system
    
21. Active IR motion detector
    
22. A Basic RF Transmitter for PIR Sensors
    
23. PIR motion detector
    
24. Simple alarm system
    
25. Automatic door opener using PIC12C508
    
26. Home security project
    
27. 5 Zone alarm circuit
    
28. Miniature loop alarm
    
29. Novel Buzzer
    
30. Gate alarm circuit
    
31. Modular Burglar Alarm
    
32. Motorcycle alarm
    
33. Enhanced 5 Digit Alarm Keypad
    
34. Enhanced 4 Digit Alarm Keypad
    
35. RF Alarm
    
36. Single Zone Alarm
    
37. Water Activated Alarm
    
38. Water level alarm
    
39. Perimeter monitor
    
40. Digital combination lock
    
41. Alarm control keypad
    
42. Almost Ultrasonic Motion Sensor
    
43. Touch activated alarm system
    
44. Combination Lock (PIC16F84)
    
45. Low power RFID transponder
46. 
    
    Voltar para o Topo
    Amplificadores de potência de áudio e RF
47. amplificador de 100w rms com o tda7294
48. 70...100w_dmos_audio_amplifier_with_mute&st-by
49. 70w-pwr-amp
50. ampli-lm1875-18w
51. TDA7294
52. Amplificador de 60 Watts com tip3055 e 2955
53. Two transistor audio amplifier
54. amplificador de 22000 w rms
55. amplificador stereo de 100w com stk4231
56. amplificador a mosfet de 100w
    
57. Personal stereo audio amp
    
58. Headphone amplifier
59. Amplificador com o tda8571
    
60. 1.5W Audio amplifier
    
61. Low-level audio amp
    
62. 10W amplifier
    
63. 80W amplifier
64. amplificador de Audio com o tda2030
    
65. LM383 12V Amplifier
66. Amplificador de 100w rms com  tip 142 e 147
    
67. 100W Amplifier
    
68. 18W Audio amplifier
    
69. 25W MOSFET amplifier
    
70. Headphone amplifier
    
71. Portable headphone amplifier
72. amplificador de three way de 300w
73. amplificador de 70w rms
74. amplificador de 310w rms
75. 2W amplifier
76. 4W amplifier
    
77. 8 watt audio amp
78. amplificador de 100 e 200w em brigid
    
79. 20W Amplifier
    
80. 50W Amplifier
81. amplificador de 120W mosfet irf9540 540
    
82. 100W Audio amplifier
    
83. 100W RMS Amplifier
    
84. 2-Channel Power Amplifier
    
85. Push-Pull Class A Amp using type 5687 dual triodes
86. amplificador com o tda7386
    
87. Push-Pull Class A 2A3 Stereo Amp
    
88. Single Ended Class A2 SV811-10 Stereo Amp
    
89. Audio amplifier output relay delay
    
90. Spatial Distortion Reduction Headphone Amp
91. amplificador de 380w rms
    
92. HeadBanger Headphone Amp
    
93. 2W Amplifier
    
94. TDA2030 8 Watt amplifier
95. Amplificador Linear de RF
    
96. Headphone distribution amp
    
97. Headphone monitor amp
    
98. 50W audio power amplifier
99. amplificador de 10w com o tda2003
    
100. Bi-Directional 2.4 GHz One Watt Amplifier
     
101. Bi-Directional 900Mhz One Watt Amplifier
     
102. 20 Watt GaAaFET Power on 2.3 GHz
     
103. 1 Watt 2.3 GHz RF Amplifier Using a MRF2001
104. Subwoofer ativo
     
105. 2.3 GHz Power Amplifiers
     
106. 2304 and 3456 MHz Power Amplifiers
     
107. High quality exponential VCA
     
108. 16 Watt amplifier
     
109. 8 Watt amplifier
     
110. Power amp schematic (PDF)
111. amplificador de 100w rms
     
112. 20 Watt Class-A Power Amplifier
     
113. El-Cheapo - A Really Simple Power Amplifier
     
114. Single Chip 50 Watt / 8 Ohm Power Amplifier
     
115. Hi-Fi Headphone Amplifier
116. amplificador stereo de 25w com stk4141
     
117. 100W Guitar Amplifier
     
118. Death of Zen (DoZ) - A New Class-A Power Amp
     
119. Soft-Start Circuit For Power Amps
     
120. Thermo-Fan To Keep Your Amp Cool
121. amplificador de áudio stéreo de 600w rms
     
122. Audio Amp Output Power Limiter
     
123. 55W (Originally 75W) Power Amplifier
     
124. 300W Subwoofer Power Amplifier
     
125. 20 Watt / Channel Stereo Power Amplifier
     
126. Mini bench amplifier (LM386)
     
127. 12 Watt Valve Guitar Amp
128. amplificador de 300w
129. amplificador de 400w
130. amplificador de 110w rms com o 2n3055
     
131. 
     Voltar para o Topo
     Pré amplificadores de áudio
132. pré-amplificador com lm741 ou ca3140
133. sistema de loudnes com pré-amplificador
134. Microphone amplifier
135. mesa de som stereo de 3 canais
     
136. RIAA phono amplifier
137. pré-amplificador de microfone
     
138. Low impedance microphone amplifier
     
139. Dynamic microphone preamplifier
140. buffer para cd player
     
141. Phono preamp
     
142. Masthead preamp
143. tonal ativos com controles dos graves
     
144. Preamplifier for microphone or guitar use
     
145. Simple microphone preamplifier
146. crossover ativo
     
147. Tube microphone preamp
     
148. Simple Stereo Electret Microphone Preamplifier
     
149. Simple Stereo Electret Microphone Preamplifier
150. chave digital de áudio
     
151. Phono Preamp
     
152. Simple microphone preamplifier
     
153. ECM Mic preamp
154. pré-amplificador com agudos
     
155. Hi Fi preamp
     
156. Balanced microphone preamp
     
157. Audio preamp
158. pré-amplificador para microfone de eletreto
     
159. Electret mic amplifier
     
160. Audio preamplifier
161. pré-amplificador de alta qualidade
     
162. Vacuum Tube Microphone Preamp
     
163. FET Preamp Cable
     
164. Audio preamp
165. pré-amplificador para mic de eletreto
166. pré-amplificador de audio
167. pré-amplificador para captador
168. pré-amplificador com realimentação híbrida
169. sistema de loudnes com pré-amplificador
     Voltar para o Topo
     Automotivo, circuitos para carros e motos
170. Electronic auto stethoscope
     
171. Turn signal alarm
     
172. Motorcycle turn-signal system
     
173. Cigarette lighter 9V adaptor
     
174. Analog Tachometer for Gasoline Engines
     
175. Headlight On reminder with Light
     
176. Adaptive Windscreen Wiper Control
     
177. Car clock
     
178. Car message display
     
179. Car interval wiper
     
180. Safety indicator light
     
181. Speed limit alert
     
182. Grand Cherokee Off-Highway Lights
     
183. Engine control unit schematics
     
184. Portable CD Player Adapter For Car
     
185. Car battery charger
     
186. Wireless Auto Tachometer
     
187. Alternator Signal Detector
     
188. Automotive alarm system
     
189. Road ice alarm
     
190. Automotive Anti-Lock Brake Control Driver
     
191. Headlight reminder
     
192. Breath Alcohol Tester controlling a car ignition system
     
193. Simple car battery charger
     
194. Parking sonar
     
195. Fuel injector pulse width monitor
     
196. BMW R Series Motorcycle Regulator Schematic
     
197. 80188XL Engine Tachometer
     
198. Integrate Fuel Pump Wire Security Cut Off with a Turbo Timer
     
199. Simple Car Preamplifier and Artificial Earth
     
200. FCD (Fuel Cut Defencer)
     
201. Interface between GM's 5 Volt 8192 baud ALDL data stream and a PC serial port
     
202. 5301 wideband fuel mixture display
     
203. Wide Band Fuel Mixture Display
     
204. 3rd brake light
     
205. 12V to 9V car coverter
     
206. Car Nicad charger
     
207. Combination lock for car liftgate
     
208. BMW motorcycle side stand protection mod
     
     Voltar para o Topo
     circuitos de aquisição de dados e lógica
209. Air flow detector
     
210. Air flow detector
     
211. Strain gauge sensor
     
212. Digital Water Wave/Tide/Level Meter (PIC16F876)
     
213. Self made data-logger V2.5 (second edition)
     
214. Magnetometer
     
215. Analog input section based on AD9220
     
216. uModem 4+4/8 channel A/D board
     
217. ADXL202 accelerometer to CV output
     
218. Light direction sensor
     
219. 12-Bit ADC interface
     
220. Digital thermometer
     
221. Universal flight controllers / datalogger
     
222. Rain detector
     
223. Home Brew Compass Sensor
     
224. Using 555 Timer as an A/D converter
     
225. ADC0804LCN 8-bit A/D converter
     
226. Web-based thermometer project
     
227. Low Flow-Rate Thermal Flowmeter
     
228. Geiger counter
     
229. Differential Capacitance Measurement for Tilt Meter
     
230. Honey Bee counter (PDF)
     
231. Capacitance type liquid level measurement (PDF)
     
232. Thermostat node schematic
     
233. Digital PC Oscilloscope
     
234. Ultrasonic Range & Imager
     
235. Precision Digital Altimeter
     
236. Digital compass schematic
     
237. Temperature datalogger
     
238. Serial Port A/D-converter
     
239. Centronics port D/A converters and low-pass filter
     
240. LCD Thermometer
     
241. Acceleration monitor using Analog Devices ADXL202
     
242. Optical sensor using PIC12C508
     
243. Wireless Liquid Level Sensing for Restaurant Applications
     
244. Accelerometer Schematic
     
245. Pressure Sensor-Based Altimeter Circuit
     
246. Ultrasonic range finder circuit
     
247. 1-wire barometer
     
248. Water-level sensor
     
249. Addressable ADC
     
250. Electronic altimeter using PIC16F877
     
251. Wireless weater station
     
     Voltar para o Topo
     Filtros de rf e para circuitos audio
252. Galaxy Noise Filter
     
253. Low-pass active filter
     
254. Filter Circuit for the Earthworm Seismic Data Acquisition System
     
255. Active 2nd Order Filters
     
256. RC Notch Filter (Twin T)
     
257. Multiple Feedback Bandpass Filter
     
258. CW filters
     
259. Self-tune filter
     
260. SSB AF filter
     
261. Helical Resonator Notch Filter
     
262. 3KHz low-pass filter plus audio amp (PDF)
     
263. Active bandpass filters
     
264. Bandpass filters
     
265. Butterworth filters
     
266. Narrow band audio bandpass filter
     
267. Inversal notch and bandpass filter
     
268. DC Accurate, Active RC Lowpass Filter
     
269. Chebyshev Bandpass Filter
     
270. Bandpass filters
     
271. Chebyshev / Butterworth filters
     
272. Biquad Active Bandpass Filter Schematic
     
273. "A" Weighting Filter For Audio Measurements
     
274. Multiple Feedback Bandpass Filter
     
275. Digital signal processor (DSP) for radio communications
     
276. 29.85 MHZ bandpass filter schematic
     
277. 29.85 MHZ notch filter schematic
     
278. LC filter design
     
279. 
     Voltar para o Topo
     Jogos e diversão (circuitos)
280. Visor cradle serial interface
     
281. Electronic coin tosser
     
282. Electronic craps game
     
283. First response monitor
     
284. VCR ping pong game
     
285. Video ping pong game
     
286. MBC5/CPLD for the GameBoy
     
287. GameBoy Camera Parallel Port Interface
     
288. Mobile robot (PDF)
     
289. PSX controler to PC MIDI converter
     
290. Dreamcast PC serial adapter
     
291. GameBoy Cart Programmer
     
292. Memory game
     
293. 32 Kb x 8 emulator for the GameBoy
     
294. Project: NES to Atari 2600 controller interface
     
295. Battery Meter for Pinball Machines
     
296. SRX1 (Stephane's Robotic eXperiment 1)
     
297. Pine Racecar Victory Judge
     
298. Interfacing Sony control stick to Empeg
     
299. Electronic Nicad glow plug driver
     
300. April Fools LEDs
     
301. Pinewood Derby logic
     
302. Quiz Master
     
303. GameBoy Schematic
     
304. GameBoy LCD schematic
     
305. GameBoy Power & Cartridge schematic
     
306. GameBoy ROM+RAM+MBC1 Cart Schematic
     
307. GameBoy MBC1 circuit equivalent
     
308. Super GameBoy schematic
     
309. Quiz show indicator
     
310. Dreamcast interface
     
311. Bingo!!! (on your tv)
     
312. Slot car TV cronograph
     
313. Furby reverse-engineered circuit
     
314. Sanyo 20EZ monitor Arcade Game (300k ZIP)
     
315. Burger Time Arcade Game (500k ZIP)
     
316. Dig Dug Arcade Game (800k ZIP)
     
317. Frogger Arcade Game (500k ZIP)
     
318. Galaga Arcade Game (542k ZIP)
     
319. Gyrus Arcade Game (800k ZIP)
     
320. Junior Pacman Arcade Game (400k)
     
321. Ladybug Arcade Game (335k ZIP)
     
322. Mappy Arcade Game (470k ZIP)
     
323. Moon Cresta Arcade Game (300k ZIP)
     
324. Mr.Do Arcade Game (554k ZIP)
     
325. PacLand Arcade Game (316k ZIP)
     
326. Pengo Arcade Game (313k ZIP)
     
327. Q*Bert Arcade Game (600k ZIP)
     
328. Qix Arcade Game (476k ZIP)
     
329. Scramble Arcade Game (600k ZIP)
     
330. Time Pilot'84 Arcade Game (870k ZIP)
     
331. Xevious Arcade Game (450k ZIP)
     
332. Magic Wand Conjuring Trick
     
333. Quiz game circuit
     
334. E.S.P. Conjuring Trick
     
335. Video game system using PIC18F252 (direct video generation)
     
336. Video game system using SX28 (direct video generation)
     
337. DIT shutterglasses controller
     
338. Tic-tac-toe game using PIC16F628
     
339. Archery timer
     
340. PIC micro Tetris game
     
341. Magic lamp, IR remote control jammer and other fun circuits (PDF)
     
342. Lego Mindstorms Double Rotation Sensor
     
343. 
     
     Voltar para o Topo
     circuitos usando infra vermelho em controles remotos e outras aplicações
344. IR detector
     
345. Infrared body heat detector
     
346. Stereo IR audio receiver
     
347. General purpose IR receiver
     
348. Wireless IR headphone transmitter
     
349. Wireless IR headphone receiver
     
350. Infrared remote control shutter release system
     
351. Infrared transmitter for locomotives
     
352. Infrared gate for door
     
353. Infrared circuits for remote control
     
354. Serial port controller infrared transmitter (PIC16F628)
     
355. IR Receiver (Amplitude Modulated IR)
     
356. IR Transmitter for Audio (Amplitude Modulated IR)
     
357. Digibox interface
     
358. IR remote control
     
359. Long Range Infrared Remote
     
360. iRDA to TTL interface
     
361. 40KHz light receiver (PDF)
     
362. 40KHz TV-VCR repeater (PDF)
     
363. Micro based PIR to IR remote converter
     
364. IR-related ASCII Schematics V1.00
     
365. Infrared remote transponder
     
366. Build an Infrared night scope
     
367. Decoding IR Remote Controls
     
368. IR detector
     
369. PC IR Remote Control Hardware
     
370. PC IR Remote Control
     
371. An Ambient-Light-Ignoring Infrared Active Motion Detector
     
372. Infrared Transmitter and Receiver schematic diagrams
     
373. Pyroelectric Infrared Sensor
     
374. Minimal Infrared transmitter for PC
     
375. Simple IR transmitter circuit
     
376. Simple infra-red detector
     
377. AVR (AT90S2313) serial port infrared receiver
     
378. Infra Red Switch
     
379. IR remote control extender
     
380. IR Remote Control Extender Circuit (Mark 2)
     
381. IR Remote Control Extender Circuit (Mark 3)
     
382. IR Link
     
383. IR remote control tester
     
384. 40khz IR Tester
     
385. 555 timer 40khz IR Oscillator
     
386. IR detector / emitter
     
387. Fire-Stick infrared remote control
     
388. Simple infrared remote control
     
389. Infrared / Ultrasonic beacon
     
390. Implementing Infrared Object Detection
     
391. IR detector for robotics
     
392. Computerized Infrared Remote
     
393. 
     Voltar para o Topo
     Laser transmissores e fontes de aliemntaçõ para equipqmentos laser
394. Light beam receiver for laser pistols
     
395. 12V supply for He-Ne laser
     
396. Laser diode transmitter
     
397. Laser power supply
     
398. Laser transmitter/receiver
     
399. Laser harp
     
400. Laser Telephone Receiver Circuit
     
401. Fiber Optic Voice Communications
     
402. Efficient Laser Supply
     
403. 20MHz VCSEL 3mW laser test circuit (PDF)
     
404. 10MHz to 20MHz laser light detector (PDF)
     
405. Micro-power 40KHz burst laser diode driver (PDF)
     
406. 40KHz laser burst detector (PDF)
     
407. Modulated laser diode tester (PDF)
     
408. Ar/Kr Ion Laser Power Supply
     
409. Laser diode power supply circuits
     
410. RS-232 Laser Transceiver
     
411. HeNe laser power supply
     
412. OPT201 Laser receiver
     
413. OPT301 Laser receiver
     
414. Laser transmitter schematics
     
415. Diode Laser Power Supplies
     
416. Laser bug circuit
     
417. RS-232 Laser Transceiver
     
418. Experimental laser data link
     
419. Ar/Kr Ion Laser Power Supply Design
     
420. Simple laser communicator
     
421. 
     Voltar para o Topo
     Circuitos de iluminação e circuitos usando leds
422. Big 7-segment LED display board with SPI interface
     
423. LED Flasher
     
424. LED pulser with audible output
     
425. IR Illuminator
     
426. Flashing Christmas LED display
     
427. ICL7660 LED flasher
     
428. LM3909 replacement using discrete components
     
429. Color fade
     
430. LEDs shimmer randomly as though on fire
     
431. LED power supplies for AA cells
     
432. 1.5 Volt LED Flashers
     
433. AC Line Powered LEDs
     
434. Astable Multivibrator
     
435. 9 Second Digital Readout Timer
     
436. 9 Second LED Relay Timer
     
437. 16 Stage Bi-Directional LED Sequencer, other sequencer and flaser circuits
     
438. 10 Stage LED Sequencer
     
439. 28 LED Clock Timer
     
440. Fading Red Eyes
     
441. Two Transistor LED Flasher
     
442. 16 Stage Bi-Directional LED Sequencer
     
443. Expandable 16 Stage LED Sequencer
     
444. LED Photo Sensor Circuit
     
445. LED chaser
     
446. 7 Segment LED Counter
     
447. 7 by 10 LED Moving Sign ( 27C512 EPROM)
     
448. Sequencial LED Flasher with Reversable Direction
     
449. Tri Color LED Controller with Serial Interface
     
450. 1.5V LED flasher B (PDF)
     
451. Low current LED flasher (PDF)
     
452. 1.5V LED flasher A (PDF)
     
453. Flashing LED advertising badge (PDF)
     
454. Flashing LED advertising badge (PDF)
     
455. Pulsed LED test circuit (PDF)
     
456. Low battery voltage flasher (PDF)
     
457. Adjustable flashing LED
     
458. PWM white LED drivers
     
459. Heart of LEDs
     
460. Christmas Star
     
461. Christmas tree
     
462. LED Counter
     
463. PIC16F84 LED chaser
     
464. PIC16F84 LED signboard
     
465. PIC16F84 LED signboard 2
     
466. White LED circuits
     
467. Assorted LED circuits
     
468. LED Mood Light
     
469. LED Audio VU Meter
     
470. Robot Beacon rotating light using PIC12C508
     
471. LM3909 LED flasher
     
472. Animated LED signboard (PIC16C84)
     
473. Picxie 2 - 8x8 Animated LED Signboard
     
     Voltar para o Topo
     Circuitos relacionados com iluminação e controle
474. Dimmer AC
475. Garden light switch
     
476. DMX lighting and special effects
     
477. Microcontroller Multichannel Light Dimmer
     
478. Digital timer light switch
     
479. Hand clap lamp control
     
480. Radio controlled light switch
     
481. Disco style Strobe Light
     
482. Varying Brightness AC Lamp
     
483. 12 Volt Lamp Dimmer
     
484. 120VAC Lamp Chaser Using Solid State Relays
     
485. Flashing Neons (NE-51 / NE-2)
     
486. Sequencing Neons (NE-51 / NE-2)
     
487. Touch Activated Lamp
     
488. 220V Flashing lights
     
489. Coutesy lamp
     
490. Bedside lamp timer
     
491. TRIAC light dimmer
     
492. 12VDC Fluorescent Lamp Driver
     
493. Strobe light
     
494. Adjustable Strobe Light
     
495. RHINO8 EL Sequencer
     
496. Light Sequenced Candelabra
     
497. Light timer
     
498. 5W Fluorescent light intensity modulator (PDF)
     
499. 1W Fluorescent lamp night light (PDF)
     
500. Low-voltage light dimmer
     
501. Light chaser
     
502. 4-channel dimmer rack
     
503. PIC16F873 light controller
     
504. Disco light controller
     
505. Neon desklamp
     
506. Electronic night light
     
507. Neon lamp dimmer
     
508. LED Mood Light
     
509. LX-800 Lighting system
     
510. Xenon Strobe Light
     
511. Lamp flasher/dimmer
     
512. 
     Voltar para o Topo
     Saúde e circuitos relacionados com hospital
513. Snore alarm electronic device
     
514. Heartbeat transducer
     
515. ECG Amplifier
     
516. EKG/EEG circuit
     
517. Radiation Dosage-Rate Meter
     
518. Heartbeat monitor
     
519. Cranial Electrotherapy Stimulator
     
520. Automated crib lights
     
521. Jogging timer
     
522. Tan timer
     
523. Muscular Bio-stimulator
     
524. Pedometer
     
525. Simple lie detector
     
526. EEG preamp, anti alias filter and isolation circuit
     
527. Self Contained Electromyograph (EMG)
     
528. Cardiac monitor
     
529. Galvanic Skin Response (GSR) Schematic
     
530. Brain-Wave Machine
     
531. Lie detector
     
532. Simple lie detector
     
533. ECG project page
     
534. The ESP SIM (Sound Impairment Monitor)
     
535. Respiration system
     
     Voltar para o Topo
     Microcontroladores circuitos, programadores e placa de desenvolvimento para microchip pic, 8051, avr, motorola, basic step e outros
536. CURSO BÁSICO DE PIC
537. Microcontroladores PIC E-book gratuito do Pic16f84
538. 3dip8 programador e Microchip forum
539. ART2003 Pic programador
540. Ecopic Programador
541. GTP-04 e GTP-07  programador
542. GTP-Lite Programador
543. GTP-USB-#0 e #1
544. GTP-USB-#F1
545. GTP-USB-232
546. JDM programmer
547. Pablin
548. Paraprog
549. PG3B
550. Pic800
551. Picburner
552. PP2
553. Propic2
554. Gravador de PIC PROGPIC II Revista mecatrônica fácil
555. RCD Programmer
556. Gravador JDM com fonte externa (recomendável)
557. PROGRAMADOR DE MICROCONTROLADORES PIC POR PUERTO USB
558. PIC based packet radio encoder (PDF)
559. Atmelprog
560. Avr2313mod1
561. Avr8515_eval-board_node13_gpl2
562. Avr_zigbee_802.15.4_reva01
563. avrmp3
564. Evaluationboard_at89xx
565. ICD2-2
566. ICD2
567. PIC18f452
568. Wineprom
     
569. RS485-Version of the SAB80C535-Microcontrollerboard
     
570. PC IR receiver based on PIC16F84
     
571. Record and play fast 1-bit sound on a PIC micro
     
572. AT89C2051/4051scanning 7-segment display and keypad
     
573. AT89C2051/4051 Driving dot LED
     
574. AT89C2051/4051stepper motor interface
     
575. AT89C2051/4051connecting dumb terminal
     
576. Motorola 68K SBC (single board computer)
     
577. 8051 SBC (single board computer)
     
578. Simple RS232C Level Converter using Transistors
     
579. Motorola 68HC11 evaluation board
     
580. C-52 EVB Robot Controller
     
581. Mains clock controller using AT89C2051
     
582. AT89C2051/4051 Easy-Downloader
     
583. AT89C51/52/55 Easy-Downloader
     
584. PIC16F84 programmer
     
585. PIC16F84 miniature real-time controller
     
586. Isolated RS232 for PIC16F84
     
587. PIC16F84 debugging terminal
     
588. MiniLOGGER V1.0
     
589. Analog datalogger based on T89C51RD2
     
590. Atmel 89C Series Flash Microcontroller Programmer
     
591. Atmel 89C2051 prototype board
     
592. AT89C2051 real-time controller
     
593. PIC12C508 Night-light saver
     
594. AT89C2051 Night light saver
     
595. Atmel 8051 Flash Based-Microcontroller Programmer
     
596. AT89C2051 Digital thermometer and clock
     
597. 4-Channel Timer using Atmel 89C4051 and MAX7219 display driver
     
598. PIC16F84 CW decoder (PDF)
     
599. 12C508 Smart Lock
     
600. 80C31 stepper motor controller
     
601. Build a PIC controlled DDS VFO, 0 to 6 MHz
     
602. PIC controlled DDS VFO, 0 to 6 MHz
     
603. Basic Stamp Lightning Activity Monitor
     
604. Parallel AVR programmer
     
605. PIC16F84 line following robot
     
606. PIC16C505 IR / wireless remote control
     
607. Automatic door opener with PIC12C508
     
608. RS485-like multi-drop bus with half duplex serial protocol
     
609. WWWpic2 - A web server in a PIC
     
610. PIC16F84 web server
     
611. 50 MHz frequency counter, voltage meter & SWR/PWR indicator
     
612. Microcontroller board using the Atmel AVR AT90S8535
     
613. Programmer PIC16F84,12C50x and EEPROM 24Cxx
     
614. RDS Encoder - digital part
     
615. PIC programmer for serial port
     
616. Fully functional PS/2 mouse based on the PIC16F84
     
617. PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, PIC18F6720)
     
618. Foreign vocabulary recollector
     
619. Illuminate holiday destinations on a world map
     
620. Embedded system to send e-mails (small TCP/IP stack)
     
621. Speaking clock using PIC & ISD device
     
622. Speaking doorbell using PIC & ISD device
     
623. Whistle detector using 8-pin PIC
     
624. PIXpand
     
625. PIC16F877 to IDE interface
     
626. 68HC11 stepper motor control
     
627. 90S2313 AVR Robot Board
     
628. POCSAG encoder/decoder
     
629. Network Time Protocol AVR Clock
     
630. DS1820 Temperature Sensor Readout Unit
     
631. Rotating Sprocket Wheel Generator (PIC16F84)
     
632. Talking PIC - based on SP0256
     
633. Serial to parallel converter using the AT89C2051
     
634. AT89C2051 serial COMs to LED driver
     
635. PIC16F877 Programmer And Development System
     
636. DS1820 Arbiter V2.00 Schematic
     
637. Microchip PIC ICSP implementation
     
638. 101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU
     
639. LCD Serial Terminal
     
640. Propellor clock (PIC16F84)
     
641. Optical sensor using PIC12C508
     
642. Interfacing S-7800A to PIC16F877
     
643. A Scenix (and PIC) Programmer
     
644. MMC to PIC16F876 circuit diagram
     
645. 8088 maximum mode SBC
     
646. EZ80 single board computer schematic (Z80)
     
647. 8051 Development System Circuit Board
     
648. Voice recording and message retrieval system
     
649. Interfacing a GPS to an LCD using a Microcontroller
     
650. Long-period watchdog timer
     
651. PIC16F84 Range Finder Project
     
652. Generate video signals in real-time using a PIC16F84
     
653. PIC ICD
     
654. PIC Project #1 - RS232 to I2C Interface
     
655. Galvanic decoupling of I2C bus
     
656. Programmer PIC16F84,12C50x and EEPROM 24Cxx
     
657. Dual PIC16C84 prototype board
     
658. Graphic LCD interface
     
659. FSK modem with PIC16C84
     
660. Talking YODA project (PIC16C84)
     
661. PIC16F84/PIC16F87x-In-System-Programmer
     
662. Microcontroller interface for 5KW microwave oven
     
663. Using an I2C Serial EEPROM with a Basic Stamp 2
     
664. PIC16F84 Based Morse Code Reader
     
665. AVR-Based Serial Port IR Receiver
     
666. Interfacing piezo elements to a microcontroller
     
667. Victoria TAFE programmer (based on AT89C2051)
     
668. JDM programmer
     
669. PIC micro programmer
     
670. Speech recognition using HM2007
     
671. PIC microcontroller servo motor interface
     
672. PIC micro multiple servo motor interface
     
673. PIC16F84 countdown timer
     
674. PIC16F873 ultrasonic range meter
     
675. PIC16F873 Digital clock
     
676. PIC16F873 remote display
     
677. PIC16F84 stepper motor controller
     
678. Way small web server
     
679. PICADC - a free, PIC based "intelligent" A/D converter
     
680. 8051 development system circuit board
     
681. 8088 maximum mode single board computer (SBC)
     
682. Basic 89C2051 / 89C4051 circuit diagram
     
683. Debugging dump terminal for 89C2051 designs
     
684. Easy debugging terminal
     
685. Galvanic decoupling of I2C bus
     
686. Circuits interfacing piezo elements to a microcontroller
     
687. Driving a TRIAC using a PIC12C508
     
688. Isolated RS232C for PIC16F84
     
689. Microchip ICD (in-circuit debugger) circuit diagram
     
690. Microchip PIC ICSP implementation circuit diagram
     
691. Interfacing NMEA GPS to LCD using PIC16F84
     
692. PIC ICD (in-circuit debugger)
     
693. PIC16C71 morse code callsign generator
     
694. PIC16F84 to LCD interface
     
695. PIC16F84 I/O expander with PicBasic
     
696. Scanning 7-Segment & Keypad
     
697. 10-key serial keypad encoder
     
698. Simple RS232C Level Converter using Transistors
     
699. Talking PIC microcontroller using SP0256
     
700. PIC-Programmer 2
     
701. Connecting PIC12C508 8 to 93AA46 serial eprom
     
702. KD7LMO Micro Beacon (PIC18F252)
     
703. GPS LCD Display Project
     
704. PIC16F84 LED chaser
     
705. PIC micro LED projects
     
706. PS/2 keyboard keystroke logger based on Atmel 89C2051
     
707. Electronic distance meter based on Motorola 68HC908QY4
     
708. Fan timer based on Motorola 68HC908QT2
     
709. Atmel AVR and 8051 series ISP programmer
     
710. AT89C2051 line-follower robot
     
711. Night light saver (PIC12C508)
     
712. USB and GLCD expansion board for 8051 SBC
     
713. Basic stamp interface circuits
     
714. Microcontroller sensor and actuator interfaces
     
715. Giant money counter (PIC16F876)
     
716. PIC12C509 logic gate replacement for nitrogen filler
     
717. PIC demo board
     
718. PIC12C509 Gym Timer
     
719. PIC LCD and Keypad driver
     
720. PIC12C508 Phase Controller for 2kW heater
     
721. PIC16F84 TRIAC / IGBT brightness phase controller
     
722. PIC16F84 pulse monitor with date/time output (ZIP)
     
723. Programmer for the 68HC705C8 MicroController
     
724. 27c801 EPROM Programmer Project
     
725. LCD to PIC16C54 schematic
     
726. 68HC11 based RDS decoder
     
727. Acceleration monitor using ADXL202 and AVR
     
728. 40+ MHz 5-digit frequency counter with an AVR 2313
     
729. Interfacing DRAM to AT90S8515
     
730. Temperature monitor/controller: AVR 2313 / DS1621
     
731. PIC micro to ISA bus interface
     
732. PIC16C84 VT-52 Emulator for Linux
     
733. Microchip PIC ICD (in-circuit debugger)
     
734. Tony Nixons Pocket Programmer (PIC)
     
735. PicoWeb V5.1 (AT90S8515) tiny web server
     
736. Atmel 89C2051 In-Circuit Programmer Schematic
     
737. 8051 Development System Circuit Board
     
738. 8051 Development System Circuit Board
     
739. Microprocessor using Xilinx FPGA
     
740. Temperature controlled based on AT89CX051
     
741. I2C LCD interface
     
742. AFSK 1200 Modem based on PIC16C620
     
743. PicCon - Hidden Radio Transmitter Controller
     
744. PIC16F84 tone generator with source code
     
745. PIC16F84 tone generator
     
746. PIC16F84 tone generator (6-Bit)
     
747. AVR Beacon Super Keyer
     
748. AVR Frequency Counter
     
749. AVR Digital Voltmeter
     
750. AVR Signal Generator
     
751. Ser-Key 10-Key Serial Keypad Encoder
     
752. 2-wire LCD interface using PIC16CF84
     
753. PIC16F84 Serial I/O-expander with PicBasic
     
754. RS 485-RPT Schematic
     
755. Camera remote control system using Basic Stamp
     
756. Low cost Atmel in-system programmer
     
757. Ultra low-cost programmer for AT90S family
     
758. AVR to USB interface
     
759. Programable LCD counter with memory backup based on Atmel AT90S1200A
     
760. Connecting AT90S2313 with LCD display 2x16 char and 4x4 keypad
     
761. Atmel AVR RCEN fuse bit programmer
     
762. Electronic safety lock based on ATtiny26
     
763. GSM SMS remote control using AVR microcontroller
     
764. 128x64 LCD Driver for AT90S2313 (ZIP file)
     
765. Connecting LED to PIC Micro I/O pins (PDF)
     
766. Microprocessor RS-232 Reset
     
767. AT90S8515 experimenter board
     
768. Multi-chip programmer for PIC microcontrollers
     
769. Buffered PIC chip interface
     
770. A PIC-Based Keyboard Emulator
     
771. PIC-based robot
     
772. ScanMate audio activated recorded
     
773. PIC vacuum fluorescent display interface
     
774. PIC18F252 bootloader schematics
     
775. PIC16F876 Datalogger
     
776. GPS Repeater
     
777. Kodak DC-20 camera interface (PIC12C509)
     
778. Kodak DC-20 camera interface (PIC16F84)
     
779. PIC ICD in-circuit debugger circuit diagram
     
780. PIC programmers for parallel port
     
781. Wisp628 ISP Microchip PIC Programmer
     
782. WLoader - PIC16F877 application loader / bootloader
     
783. Nixie clock (PIC16F876)
     
784. Zilog Z80 thermostat embedded web server
     
785. Picxie 2 - 8x8 Animated LED Signboard (PIC16F84) Picxie 2 - 8x8 Animated LED Signboard
     
786. 10 tricks for interfacing to the PIC16C508
     
787. Interfacing the PIC16C508
     
788. PIC 5x7 display
     
789. Analog to digital conversion notes
     
790. Multi-chip programmer
     
     Voltar para o Topo
     Vários circuitos de áudio
791. Electronic siren
     
792. Two-tone siren
     
793. Underwater microphone
     
794. Code practice oscillator
     
795. Noise generator
     
796. Electronic whistle
     
797. Twin-T Audio Sine Wave Oscillator
     
798. 1.5V Audio Amplifier
     
799. Low Power Op-Amp - Audio Amp (Intercom)
     
800. 555 Tone Generator (8 Ohm Speaker)
     
801. 3 Transistor Audio Amp (50 milliwatt)
     
802. Low Frequency Sinewave Generator
     
803. Automatic Charger for Battery Operated Hi-Fi Preamps
     
804. Audio level indicator
     
805. Room noise detector
     
806. Amplifier timer
     
807. Bell ring generator
     
808. Amplified ear
     
809. Precision audio millivoltmeter
     
810. Six-channel Mixer and Amplifier
     
811. Audio Signal Source
     
812. Analog VU meter
     
813. Voltage controlled amplifier
     
814. Audio graphic equaliser
     
815. Intercom preamp
     
816. FET audio mixer
     
817. Microphone mixer
     
818. Tone control
     
819. Digital volume control
     
820. Sound level meter
     
821. CMOS IC audio oscillator
     
822. Three band Active Tone Control
     
823. Automatic gain control (AGC) circuits
     
824. Audio frequency meter
     
825. Bull Horn
     
826. Sound Mixer/Amplifier
     
827. Very loud beeper (PDF)
     
828. Digital noise generator (PDF)
     
829. Tone display system
     
830. Tube amplifier
     
831. Condenser microphone hookup
     
832. Phase shifter
     
833. Paradoxical Sound Syntheizer
     
834. Various tube crossover circuits
     
835. Bias circuits
     
836. Audio line isolator
     
837. Dynamic microphone to electret microphone input
     
838. Line level signal to microphone input adapter
     
839. Simple two line output combiner
     
840. Electret microphone powering circuits
     
841. Use amplifier phono input as line level input
     
842. Speaker signals to line level inputs
     
843. Spring reverb unit
     
844. Sine wave generator
     
845. Simple amplifier
     
846. 3-Band equalizer
     
847. 6-Input mixer
     
848. Doorphone intercom
     
849. Stereo line driver
     
850. Audio notch filer
     
851. Peak reading audio level meter
     
852. Tone control
     
853. Speaker Microphone Circuit
     
854. Electronic canary
     
855. Electronic siren
     
856. Microphone phantom power supply
     
857. Voltage Controlled Mixer w/Modulator
     
858. Dual Voltage Controlled Oscillator w/Modulator
     
859. Dual Voltage Controlled Filter w/Modulator
     
860. Stereo Ducker
     
861. MS Stereo Decoder
     
862. MS Stereo Microphone
     
863. RIAA Equalized Stereo Phono Preamp
     
864. Tube active crossover
     
865. Improved PL tone decoder
     
866. Magnetic cartridge amplifier
     
867. LM358 preamp
     
868. Sound detector
     
869. Tone detector
     
870. Tone generator
     
871. Warbler
     
872. Voltage Controlled Panner
     
873. Low Noise Microphone Preamplifier
     
874. Bridging Adapter For Power Amplifiers
     
875. Simple Surround Sound Decoder
     
876. Simplest Ever Amplifier Bridging
     
877. Stereo Width Controllers
     
878. Power Amplifier Clipping Indicator
     
879. Phono Preamps For All
     
880. Digital Delay Unit For Surround Sound
     
881. Parametric And Sub-Woofer Equaliser
     
882. High Quality Sound Mixer
     
883. Loudspeaker Protection and Muting
     
884. Direct Injection Box for Recording & PA Systems
     
885. Minimalist Discrete Hi-Fi Preamp
     
886. Signal Detecting Auto Power-On Unit
     
887. Load Sensing Automatic Switch
     
888. Amplifier thermal protection
     
889. Active Sub-Woofer and Controller
     
890. Balanced Line Driver & Receiver
     
891. VU And PPM Audio Metering
     
892. Variable Amplifier Impedance
     
893. Linkwitz Cosine Burst Generator
     
894. Low Noise Balanced Microphone Preamp
     
895. Fast Audio Peak Limiter
     
896. Subwoofer Equaliser
     
897. Surround Sound Decoder Mk2
     
898. Audio mixer
899. 
     Voltar para o Topo
     Miscelânea (vários circuitos)
900. Ultrasonic radar
     
901. Mobile APRS / GPS tracking system
     
902. Electronic fish lure
     
903. Ultrasonic sound receiver
     
904. Experimental data transmitter for fiber optics
     
905. Experimental fiber optic receiver
     
906. Ion detector
     
907. Darkness monitor
     
908. Electroscope
     
909. Simple event counter
     
910. Geiger counter
     
911. Light detector
     
912. Short-circuit beeper
     
913. LM 1800 FM stereo decoder
     
914. Glitch detector
     
915. MAX924 bar-graph level gauge
     
916. Ultrasonic generator
     
917. Negative ion generator
     
918. ELF Monitor
     
919. Chaos generator
     
920. Simple BFO metal detector
     
921. Voltage Comparator Information And Circuits
     
922. Build Your Own Digital Setting Circles For Your Astronomical Telescope
     
923. PL tone generator (NE567)
     
924. Bat detector
     
925. Bat detector microphone pre-amplifiers
     
926. Full-duplex doorphone with 3 wires connection
     
927. G Strain energy absorber
     
928. RDS Encoder
     
929. Toggle Switch Debounced Pushbutton
     
930. Discrete Set/Reset Flip Flop
     
931. Monostable Flip Flops (one shot)
     
932. Discrete Bistable Flip Flop
     
933. Talking Morse Code Practice Computer
     
934. Plant watering watcher
     
935. Capacitance sensor
     
936. Whistle responder
     
937. Nocturnal animals whisker
     
938. 12V DC electronic door chime
     
939. Biasing Op-Amps into Class A
     
940. Parasite zapper
     
941. Bleeper box for time reference
     
942. Analog computer
     
943. BayComm packet modem
     
944. Morse monitor
     
945. HamComm modem interface
     
946. Morse paddle keyer
     
947. UV light box
     
948. Hardware Random Bit Generator
     
949. Random noise generator
     
950. Analog pulse counter
     
951. Analog opto-isolator
     
952. Pulse width modulators (PWM)
     
953. Pulse width to voltage converter
     
954. Fantastic Atom Expander
     
955. Black Light
     
956. Computerize Your Room/Home
     
957. Flash slave trigger
     
958. Suddent ionospheric disturbance (SID) receiver
     
959. A Visual CW Zero Beating Aid
     
960. A two-way Morse practice set
     
961. Magnetic levitation device
     
962. Tesla power receiver
     
963. Lazer Tag Equipment Modifications
     
964. Garmin GPS data interconnect
     
965. Inexpensive APRS Weather Station
     
966. Walking robot
     
967. Basic op-amp circuits
     
968. Power line FM intercom
     
969. Intercom circuit
     
970. Lightning Storm Detector
     
971. Large LCD Display Buffering Driver
     
972. Text to speech converter
     
973. Ion detector
     
974. 1uS light pulse descriminator plus F to V converter (PDF)
     
975. Broadband 2MHz optical fiber receiver (PDF)
     
976. Modulated light received (PDF)
     
977. 1uS light pulse receiver plus post amp (MISC)
     
978. Broadband 5MHz optical fiber receiver (PDF)
     
979. High-speed light receiver (PDF)
     
980. Basement doorbell beeper (PDF)
     
981. Time to dust indicator (PDF)
     
982. Low-power optical interrupter (PDF)
     
983. Simple nitrogen spark generator (PDF)
     
984. Ultrasonic transducer oscillator circuit
     
985. Build logic gates using discrete parts
     
986. Jacob's Ladder
     
987. Sudden Ionospheric Disturbance (SID) Receiver
     
988. A selection of robotics projects
     
989. Bat detector (new)
     
990. Vat detector (old)
     
991. Variety of quick designs
     
992. Gold wafer (smartcard) programmer
     
993. Making a FRED photopopper
     
994. GPS receiver support kit
     
995. Griffith Observatory Tesla Coil
     
996. Fogger smoke machine
     
997. Dinsmore 1490 digital compass
     
998. Geiger counter
     
999. Electric field disturbance monitor
     
1000. Inexpensive seismometer project
      
1001. Digital dial
      
1002. Speech recognition using HM2007
      
1003. GPS receiver interface
      
1004. Doorbell for the Deaf
      
1005. Electromagnetic field detector
      
1006. Insect Repellant
      
1007. High Quality Intercom
      
1008. Magnetic Gun.
      
1009. Metal detector
      
1010. Static Electricity / Negative Ion Detector
      
1011. Ultrasonic dog whistle
      
1012. Popular Electronics Ultrasound Detector
      
1013. An Inexpensive X-ray Machine
      
1014. Navigator 555A radio direction finder (RDF) circuit diagram
      
1015. Magnetic levitation circuit
      
1016. PE3342 Programmer Schematic
      
1017. u-Blox GPS receiver board
      
1018. Assorted digital circuits
      
1019. Basic electronic circuits
      
1020. Miscellaneous simple circuits
      
1021. Digital Call Sign Annunciator
      
1022. Monitor output from Motorola Oncore GPS engine in HP Z3801A in GPS Disciplined Oscillator
      
1023. Ultrasonic switch
      
1024. Sound finding cricket with phase detector
      
1025. Sound finding cricket
      
1026. APRS GPS tracker schematic (PIC16C73)
      
1027. Common Ground for Older VPW Circuit
      
1028. Very basic circuits
      
1029. Bat detector
      
1030. FCTS Project
      
1031. Smooth Tone Clickless CW Sidetone Generator
      
1032. Morse Code Beacon Keyer
      
1033. Lightning Activated Camera Shutter Trigger
      
1034. Simple metal detector electronic circuit
      
1035. Three Power Supplies for the Garmin GPS-20 Sensor Board
      
1036. Driving N-channel FETs from TTL
      
1037. Miniature Self-Powered Autonomous Robot
      
1038. Morse Code Practice Keyer 1
      
1039. Morse Code Practice Keyer 2
      
1040. 741 Light Sensor
      
1041. Fluid level detector
      
1042. The Aisin-Seiki GPS-Receiver (The "US$20 GPS")
      
1043. Morse code display
      
1044. Intercom schematic
      
1045. Scaling ADXL50 accelerometer output
      
1046. 
      Voltar para o Topo
      Modelismo e controle remoto
1047. Snake throat muscle controller
      
1048. Handy cricket for robotic applications
      
1049. Incline Railway Control Circuit
      
1050. A Receive Signal Decoder
      
1051. 27Mhz toy car receiver
      
1052. 27Mhz toy car transmitter
      
1053. One ounce rocket ejection timer
      
1054. LED traffic lights
      
1055. Two-tone siren
      
1056. Proportional radio remote control
      
1057. Alf: The Robotic Matchbox car
      
1058. Seaplane schematic
      
1059. Model Rocket with Video Camera
      
1060. Signal breaking module
      
1061. RF serial link for robot
      
1062. PIC based rocket altimeter
      
1063. Robot with PIC16F84 brain & InfraRed eyes
      
1064. 0-10V control for RC servos
      
1065. Robotic microcontroller board
      
1066. Multi Rocket Launcher
      
1067. Model rocket launch controller
      
1068. Pad launch controller for model rockets
      
1069. Simple flashing light circuit
      
1070. Simple flashing light circuit
      
1071. A dual alternating flashing light circuit
      
1072. Simple flashing light circuit
      
1073. A dual tandem flashing light circuit powered by a 9 volt battery
      
1074. Simulate the Gyralite (dual flashing headlights).
      
1075. Simple train detector using ambient light and a photocell
      
1076. Simple charge rate monitor
      
1077. Deluxe charge rate monitor
      
1078. "CLONEPAC" memory module for Futaba 8UAF/8UAP
      
1079. Battery pack discharger
      
1080. Plane locator
      
1081. Plane locator 2
      
1082. Battery low voltage alarm
      
1083. Battery low voltage alarm 2
      
1084. Ultimate battery low voltage alarm
      
1085. R/C digital camera controller
      
1086. R/C helicopter camera
      
1087. Building an RF Remote Control System
      
1088. Motor walker circuit
      
1089. 250-amp Speed Controller for RC cars
      
1090. Spider robot electronic project page
      
1091. Two tone train horn
      
1092. R/C Emergency locator alarm
      
1093. Remote switch for radio-control aircraft accessories
      
1094. Radio Control Battery Backup
      
1095. Glow Plug driver for model engines
      
1096. 
      Voltar para o Topo
      Motor e circuitos de controle
1097. Bridge head
      
1098. PWM motor controller
      
1099. Transistor relay driver
      
1100. Latching relay driver
      
1101. Relay delay circuit
      
1102. Touch switch
      
1103. Low voltage DC motor speed controller
      
1104. Flashing neon christmas lights
      
1105. Three input first response monitor
      
1106. Switch-on delay circuit
      
1107. Electronic thermostat
      
1108. LM3911 temperature controller
      
1109. Programmable light-activated relay
      
1110. Simple 10 Stage Control Box
      
1111. One component stepper motor driver
      
1112. Dual Stepping motor drivers using UDN2540
      
1113. PWM DC motor control with SG3525
      
1114. Stepper Motor Driver using TEA3718/3717
      
1115. Microstepping with PBM3960 and TEA3718
      
1116. DC Motor Driver with L6203
      
1117. Stepper Motor Driver using L298 and L297
      
1118. Several stepper motorol control circuits
      
1119. Wireless RF PWM dual motor controller
      
1120. H Bridge Motor Control Circuits
      
1121. Motor speed controllers
      
1122. Ceiling fan speed control
      
1123. Delayed off light switch
      
1124. Deoderizer fan timer
      
1125. Electronic Thermostat Relay Circuit
      
1126. Interfacing 5 volt CMOS to 12 volt loads
      
1127. Light Activated Relay
      
1128. CMOS Toggle Flip Flop With Relay(CD4013)
      
1129. 555 Timer Monostable Circuit Using Pushbutton
      
1130. Dual Channel Servo Pulse to H-Bridge Interface
      
1131. Current loop interface
      
1132. Switching solenoid driver
      
1133. Modular relay system
      
1134. Light/dark detector
      
1135. Pulse Width Modulation DC Motor Control
      
1136. Stepper motor controller
      
1137. Touch switch
      
1138. Pump controller
      
1139. H-Bridge motor controller (5 amps, 100 watts)
      
1140. Dual Channel Servo Pulse to H-Bridge Interface
      
1141. Servo pulse to PWM converter
      
1142. 12V Sump Pump Control
      
1143. Rolling code 4-channel UHF remote control
      
1144. DC Motor Speed Controller
      
1145. 3 Phase Brushless DC Motor Xtal Based Controller
      
1146. DC motor controller
      
1147. Garden moisture controller
      
1148. Overload Voltage Protection with Automatic Reset
      
1149. Pulse Width Modulator
      
1150. Pulse Width Modulator Motor Speed Control
      
1151. Pushbutton one-shot and latch (PDF)
      
1152. Charge coupled bi-directional power MOSFET relay (PDF)
      
1153. Finger touch activated switch (PDF)
      
1154. Machine vibration triggers hour meter (PDF)
      
1155. Solid state relay (PDF)
      
1156. Line-powered Xenon flash transmitter (PDF)
      
1157. 9V Xenon photoflash controller (PDF)
      
1158. AC switching with TRIAC from TTL
      
1159. Control 120VAC relay with TTL
      
1160. Driving a relay with a CPU
      
1161. Power-line Appliance Controller
      
1162. Simple Switched Servo Driver
      
1163. Combination-controlled, fully customizable RF remote control
      
1164. Thermoelectic controller (scriptable thermometer)
      
1165. Stepper motor positioner
      
1166. Stepper motor driver
      
1167. Thermostat
      
1168. Frequency switch
      
1169. PIC16F84 RF remote controller
      
1170. Stepper motor controller
      
1171. H-Bridge shematic
      
1172. DS1821 programmable thermostat
      
1173. Hot Water Tank Indicator
      
1174. Temperature monitor
      
1175. Cold activated switch
      
1176. Voltage comparator switch
      
1177. Dark activated switch
      
1178. DC Push Button Motor Control Circuit
      
1179. Light detector
      
1180. DC Motor Reversing Circuit
      
1181. Sound operated switch
      
1182. LDR light/dark activated relay switch
      
1183. Touch Switches
      
1184. 6090 digital decoder schematics
      
1185. Assorted relay control circuits
      
1186. Adjustable Voltage motor controller
      
1187. Serial servo controller
      
1188. DC Motor-Driver H-Bridge Circuit
      
1189. PWM Motor Speed Controller / DC Light Dimmer
      
1190. Constant Temperature Circuit
      
1191. PWM DC Motor Speed Control
      
1192. Solenoid starter
      
1193. CO2 controller for planted tanks
      
1194. Light activated relay
      
1195. Delayed shutter control for Kodak DC-20
      
1196. Gasoline generator automatic throttle controller
      
1197. Block power switching module
      
1198. MOSFET H-BRIDGE schematic and theory
      
      Voltar para o Topo
      Music and audio related circuits
1199. Audible metronome
      
1200. Visual metronome
      
1201. Peak-reading meters
      
1202. Octave screamer
      
1203. Amiga MIDI interface
      
1204. Apple Mac to MIDI synthesizer interface cable
      
1205. Apple Macintosh MIDI interface schematic (basic version)
      
1206. Apple Macintosh MIDI interface schematic (deluxe version)
      
1207. Standard MIDI to MIDI interface cable diagram
      
1208. Simple MIDI switcher
      
1209. MIDI interface / cable tester
      
1210. MIDI keyboard
      
1211. MIDI merger schematic
      
1212. 25-pin PC serial port to MIDI synthesizer interface cable
      
1213. 9-pin PC serial port to MIDI synthesizer interface cable
      
1214. Serial MIDI interface
      
1215. Microcontroller MIDI interface
      
1216. MIDI keyboard circuit
      
1217. Spring reverb unit
      
1218. Colour organ light
      
1219. MP3 Player
      
1220. Metronome and pitch generator
      
1221. Mini metronome
      
1222. Compact Flash / IDE MP3 Player MKI
      
1223. Simple colour organ
      
1224. Guitar fuzz effect
      
1225. 8 note tune player
      
1226. Colour (Sound) Organ
      
1227. Transisor organ
      
1228. BookPC Car MP3 Player
      
1229. Yet Another Mobile MP3 Player
      
1230. Wave Multiplier for music synthesizers
      
1231. Vibrato Circuit for Guitar, Steel, Bass, Etc.
      
1232. MIDI status indicator
      
1233. Zonk Machine and Treble Booster
      
1234. Simple line mixer
      
1235. Simple MIDI tester
      
1236. MIDI Controller Footpedal
      
1237. DIY Serial MIDI Interface (80C51/80C31 Version)
      
1238. Electronic metronome
      
1239. Sound Effects Generator
      
1240. Sound Effects Generator 2
      
1241. Digital Guitar Tuner
      
1242. Drum tone oscillators
      
1243. Analog MIDI synthesizer
      
1244. Spring reverb
      
1245. MIDI to CV interface
      
1246. Dual phantom power pre-amp
      
1247. Four channel fuzz box
      
1248. Theremin controller
      
1249. Vocal zapper
      
1250. MIDI drum machine project
      
1251. MIDI Drum Machine Analog Input Schematic
      
1252. Guitar Reverb Pedal
      
1253. Guitar Tremolo Unit
      
1254. Spring Reverb Unit For Guitar
      
1255. Ultra Simple Bass Guitar Compressor
      
1256. Vox AC30 Guitar Amplifier Simulator
      
1257. Guitar Vibrato Unit
      
1258. Musical Instrument (Expandable) Graphic Equaliser
      
1259. Midibox 64
      
1260. 
      Voltar para o Topo
      Pcs and peripheral ideas and circuits
1261. Fonte 13.7 Volts pc atx power suply based
1262. PC IR Remote Control Signals
1263. Plotter caseira
1264. I2C printer port adaptor
      
1265. RS232C Level Converter
      
1266. PC electrically isolated RS422 interface using SN75176B or MAX485
      
1267. PC electrically isolated RS485 interface using MAX487 or SN75176B
      
1268. Short circuit protected power supply from PC 12V supply
      
1269. Isolated Full Duplex RS232C Interface
      
1270. RS232 DB-9 switch to flip between two serial ports
      
1271. DB-9 Connector to DB-25 (both RS-232)
      
1272. Mac Serial Port (RS-422 DIN-8) to RS-232 DB-25
      
1273. Modem Rockwell RCV336/ACF model V1433VQR ext.
      
1274. Genius Mouse schematics
      
1275. EEPROM programmer
      
1276. Commodore 64 24-bit parallel port interface with 8255
      
1277. Sound Card Interface with Tone Keyer
      
1278. RGB oo Monochrome converter - Matches impedance of PC to CCTV monitor
      
1279. Ericsson phone to PC serial port interface
      
1280. PC serial port receiver
      
1281. Parallel port relay interface
      
1282. ISA 48 I/O digital card
      
1283. PC infrared iRDA interface using TFDS 4500
      
1284. Jupiter card programmer
      
1285. USB to RS232 Dongle
      
1286. Parallel (Printer) Port Interface
      
1287. RS-232 line monitor and loopback cables
      
1288. The KD2BD Pacsat Modem
      
1289. A Serial Infrared Remote Controller
      
1290. PC Serial and Parallel Port Software and Interfaces
      
1291. Interfacing 16x2 character :LCD to parallel port
      
1292. RS-232 Protocol Analyser
      
1293. Interface cable for Casio QV-200 digital camera
      
1294. Radio clock for PC's
      
1295. A PC-Based LowFER Frequency Synthesizer
      
1296. General purpose 48-bit ISA parallel I/O card
      
1297. Power from RS-232 port
      
1298. PCI to ISA converter
      
1299. WatchDog for ISA Bus
      
1300. 4-channel 8-bit analog-to-digital converter for PC
      
1301. Printer port ADC
      
1302. Parallel port ADC based on MAX147
      
1303. Analog Signal Acquisition for PC Printer Port
      
1304. More accurate PC/AT clock
      
1305. Getting power from RS-232 interface
      
1306. Barcode scanner
      
1307. Build your own iRDA SIR Transceiver (Dongle) using MCP2120
      
1308. PC thermometer
      
1309. Dive computer interface
      
1310. Parallel port servo controller
      
1311. GPS receiver (Gamin, Eagle etc) to PC interface cables
      
1312. Connect two CD-ROM drives to one soundcard
      
1313. Headphone driving circuit for soundcards
      
1314. Get power out of PC parallel port
      
1315. Null Printer Adapter
      
1316. PC speaker volume control circuit
      
1317. How to get power from PC to your circuits
      
1318. RS-232 surge protection
      
1319. Simple RS-232 serial port buffer circuit
      
1320. Get power out of PC RS-232 port
      
1321. Sound Blaster Microphone Preamplifier
      
1322. Sega 3D glass interfacing circuits
      
1323. Convert Atari-style joystick to PC joystick port
      
1324. Fake Joystick circuit
      
1325. Using the joystick port as general purpose input
      
1326. Connect other circuits to PC joystick port
      
1327. Schematic of a standard PC joystick
      
1328. Simple PC SmartCard reader
      
1329. Fax to modem interface
      
1330. Analog to Digital Conversion (ADC) and Communicating with a PC
      
1331. Temperature sensor for PC
      
1332. Interfacing to an IBM PC/AT keyboard
      
1333. PC interface for point controller
      
1334. Linux Infra-red Remote Control (LIRC)
      
1335. Homebuilt RS232 LCD Interface
      
1336. Compter microphone
      
1337. CCD linear image sensor to PC parallel interface
      
1338. Laptop Computer Serial Port Power Booster
      
1339. Assorted computer interface circuits
      
1340. HamComm Interface
      
1341. Apple II/II+/IIe IDE Drive Interface
      
1342. Basic Stamp I & PC Relay Controller
      
1343. RS-232 to TTL cable
      
1344. Hi-Fi PC Speaker System
      
1345. IDE hard-disk interface for Amiga 500
      
1346. How to construct Garmin GPS receiver interface cables
      
1347. iRDA printer adapter
      
1348. 160 Baud ALDL Hardware Interface
      
1349. AT PC Power Supply 1
      
1350. AT PC Power Supply 2
      
1351. AT PC Power Supply 3
      
1352. AT PC Power Supply 4
      
1353. AT PC Power Supply 5
      
1354. iLINK Interface
      
1355. Digital Signals Decoding Interfaces
      
1356. 9-pin null modem cable
      
1357. RS232 - Lowe HF-225 interface
      
1358. RS232 to IrDA convertor using Vishay TOIM3232
      
1359. Interfacing PC sound card to SSB rig
      
1360. Supply Derives Power From 3-Wire RS-232 Port
      
1361. 24-line PC digital interface (PDF)
      
      Voltar para o Topo
      PDA interfaces
1362. Casio interface circuits
      
1363. SHARP palm-top/hand-held to RS232 serial converter
      
1364. Interfacing ultrasonic range finder to BrainStem
      
1365. Hamamatsu UVTron Interface to a BrainStem
      
1366. Casio interface cable
      
1367. Casio organiser hardware
      
1368. MIDI interface for Palm computers
      
1369. MIDI interface for Palm cradle
      
1370. MIDI interface for Visor USB
      
1371. MIDI-USB Cradle for Visor (Deluxe, Platinum)
      
1372. MIDI interface for Visor
      
1373. Casio datalogger
      
1374. Interfacing ADXL202 accelerometer to PalmPilot
      
1375. PalmPilot audio interface
      
1376. PalmPilot cradle to modem adapter
      
1377. PalmPilot connector pinouts
      
1378. PalmPilot serial port interface
      
1379. PalmPilot memory schematics
      
1380. Aladin interface
      
1381. PalmPilot turbo boost guage interface
      
1382. IBM PC keyboard to PalmPilot interface
      
1383. Aladin interface using op-amp
      
1384. Wireless local network for PalmPilot (large PDF)
      
      Voltar para o Topo>
      Fontes de alimentação  fixas e ajustáveis
1385. Fonte 1.5 a 30 volts
1386. Fonte 1.5 a 30 volts
1387. Fonte 13.7 Volts pc based
1388. Carregador com lm317T - Carregador para bateria de carro
1389. Power supply provides +5VDC regulated, +10VDC unregulated and 7.5VAC
      
1390. 13.5KV power supply
      
1391. Kirlian device supply
      
1392. LM317 adjustable power supply
      
1393. LTC1265 Nicad charger
      
1394. Single cell lithium battery charger
      
1395. Smart battery charger
      
1396. Battery charge indicator
      
1397. Lead acid trickle charger
      
1398. 12B Battery condition indicator
      
1399. Alkaline battery charger
      
1400. Alternative power source for Magellan GPS receivers
      
1401. Power Tool Torque Control
      
1402. Generating Negative 5 Volts from 9 Volt Battery
      
1403. LED Battery Condition Indicator
      
1404. LM317 Variable Voltage Regulator
      
1405. LM317 Regulator With Pass Transistor
      
1406. High Current Regulated Power Supply
      
1407. Simple Variable Voltage Source
      
1408. Various switching power supplies
      
1409. Variable 3 - 24 Volt / 3 Amp Power Supply
      
1410. 2 watt switching power supply
      
1411. Variable Voltage and Current Power Supply
      
1412. Low Power DC to DC Converter
      
1413. Constant Current Battery Charger
      
1414. Intelligent NiMH/NiCd switched mode fast charger
      
1415. Variable DC power supply
      
1416. Nicad battery charger
      
1417. Simple power supply
      
1418. Voltage converter
      
1419. Bench power supply
      
1420. Easy power supply
      
1421. Valve power supply
      
1422. 6V to 12V Converter
      
1423. Tesla coil / HV generator
      
1424. High Current Power Supply
      
1425. Dual Polarity Power Supply
      
1426. High Voltage High Current Power Supply
      
1427. Transformerless Power Supply
      
1428. Fixed Voltage Power Supply
      
1429. Voltage Inverter
      
1430. Voltage Inverter
      
1431. Dual power supply
      
1432. 1A Variable Regulated Power Supply
      
1433. Negative voltage generator
      
1434. 12V battery capacity tester
      
1435. NE555 Low Voltage Battery Disconnect Circuit
      
1436. 33 Volt DC To DC Converter
      
1437. Automatic AC voltage (110/240) selector
      
1438. Variable 0-5A Current Source
      
1439. Ground Fault Interupter
      
1440. Intelligent battery charger
      
1441. 12 Volt DC Load Control and Battery Protection
      
1442. Low battery indicator
      
1443. Variable power supply
      
1444. Switching Power Supply
      
1445. Low Power DC Quadrupler
      
1446. Surge protector
      
1447. Ultimate power supply
      
1448. Variable Regulated Power Supply
      
1449. Power reminder beeper (PDF)
      
1450. Unplugged power cord alarm
      
1451. Machine power loss beepter (PDF)
      
1452. Low-dropout 12V regulator (LM324)
      
1453. HV supply: 12VDC in, 12KV out
      
1454. Generating -5VDC from +5VDC
      
1455. Filtering PC bus POWER
      
1456. Bidirectionall power inverter
      
1457. Nagative voltage generation using 555 timer
      
1458. High current regulated power supply
      
1459. One 9V battery gives +18, +25, +33V
      
1460. +9V *and* -9V from one battery
      
1461. Battery charger
      
1462. Adjustable power supply using LM317
      
1463. Simple +5V power supply circuit
      
1464. 12 Vdc - 120 Vac Inverter Schematic
      
1465. +12V/-12V Power supply unit
      
1466. +/-12V -> +/-5V Power unit
      
1467. +5V Switching regulator (1)
      
1468. Switching regulator (2)
      
1469. Electric power controller
      
1470. +30V power supply with +5V
      
1471. +30V DC-DC converter
      
1472. DC/AC inverter (2)
      
1473. DC/AC inverter (1)
      
1474. PIC16F873 DC motor speed controller
      
1475. 12V 30A power supply
      
1476. Dual regulated power supply
      
1477. Fuse blown indicator
      
1478. Gyrator circuit
      
1479. Variable power supply
      
1480. LM317 Regulator Circuit
      
1481. Nicad battery charger
      
1482. Regulated 12V supply
      
1483. Unregulated power supply
      
1484. Snowmobile GPS power adapter
      
1485. Simple switching power supply
      
1486. Assorted power source and control circuits
      
1487. 12 volt battery monitor
      
1488. 12 volt power supply
      
1489. 5 volt power supply
      
1490. Battery voltage monitor
      
1491. LM3914 battery monitor
      
1492. Multiple voltage power supply
      
1493. Voltage doubler
      
1494. Voltage inverter
      
1495. PWM Motor Speed Controller / DC Light Dimmer
      
1496. PWM Motor/Light Controller
      
1497. Low Power LED Voltmeter
      
1498. PWM Motor/Light Controller
      
1499. PWM Motor/Light Controller variants
      
1500. Low Power LED Voltmeter
      
1501. Temperature Controlled NICD Charger
      
1502. Simple Capacitance Multiplier Power Supply For Class-A Amplifiers
      
1503. Simple DC Adapter Power Supply
      
1504. Variable Dual Lab Power Supply
      
1505. Battery Charger Ideas
      
1506. Power control for arc welders and other inductive loads
      
1507. Charger for gel lead acid batteries
      
1508. Nicad battery cycler
      
1509. Battery Characterizer
      
1510. Nicad Battery Discharger/Capacity Indicator
      
1511. 200 Watt Modified PC Power Supply 13.5 Volt 14 Amp
1512. 
      Voltar para o Topo
      Radiofrequency circuits and antennas
1513. Amplificador de sinais de tv uhf vhf (booster)
1514. 45-70 MHz aerials for TV DX
1515. A71 VHF antennas for CW/SSB
1516. F6ITV, ALL HF BAND ANTENNA - 22m
1517. Super Antena ARTESANAL para telefonía celular
1518. 9 dB, 70cm, Collinear Antenna
1519. 802.11b Homebrew WiFi Antenna
1520. How To Build A Tin Can Waveguide WiFi Antenna
1521. 80/40m Vertical
1522. Antena de 7 MHz de alta ganancia
1523. Antena para Cacerías de Zorro en 144 MHz
1524. Antena de tamanho reduzido para 10/15/40/80 e 20m
1525. A compact 2 element beam for 10M
1526. Antennae for the Low Bands..80 and 160m
1527. Antena para VHF
1528. ANTENA YAGI A PARTIR DE UNA LATA DE PATATAS PRINGLES
1529. DIRECIONAMENTO DE ANTENA PARABÓLICA UNIVERSAL
1530. TV Signal Amplifier
1531. 15dB UHF TV Antenna Booster
1532. VCO 20MHz
1533. UHF oscillator
      
1534. Economoy short-wave radio
      
1535. Linearized RF detector
      
1536. Two-band radio
      
1537. Shortwave conveter for scanners
      
1538. FM Bug
      
1539. AM Radio
      
1540. Toroidal coil RF shortwave receiver
      
1541. Crystal radio
      
1542. CW RECEIVER 40/80 meter CW receiver
      
1543. TRF AM Receiver circuit
      
1544. WLW 500KW Transmitter Schematic
      
1545. AM-Receiver for Aircraft communication (118.250MHz)
      
1546. AM receiver for aircraft communications
      
1547. 45-860MHz Radio receiver based on UV916-tuner
      
1548. 80 Meter CW ARDF receiver
      
1549. Four channel RF remote control
      
1550. CW zero beat indicator (PDF)
      
1551. Build your own VLF Receiver
      
1552. Receiver building blocks
      
1553. Simple wireless radio data link
      
1554. RX3302 receiver module schematic
      
1555. Superregenerative 27MHz receiver
      
1556. 49MHz walkie-talkie
      
1557. Convert 2m VHF FM PMR transceiver Motorola Radius M110 into an amateur radio
      
1558. Vibrating pocket bug detector
      
1559. 2MHz RF Oscillator
      
1560. 50-150MHz Overtone Oscillator
      
1561. Simple Op-Amp Radio
      
1562. UHF - 100W Transistorized amplifier
      
1563. 50MHz Converter
      
1564. RF front-end for triple conversion GPS receiver
      
1565. 2M - 20M transverter
      
1566. Improved CMOS RF PLL sythesizer
      
1567. Harmonic oscillator
      
1568. Direction finder system
      
1569. One transistor regenerative receiver
      
1570. Synthesized HF receiver
      
1571. TBA120 narrowband FM receiver
      
1572. TDA7000 receiver
      
1573. ZN414 receivers
      
1574. 10W HF linear amplifier
      
1575. 500W HF linear amplifier
      
1576. 3W HF QRP linear amplifier
      
1577. Phasing SSB exciter
      
1578. 500mW HF linear amplifier
      
1579. Generic VHF power amplifier
      
1580. 10.7MHz FM detector
      
1581. RTTY terminal unit
      
1582. Q-multiplier
      
1583. CMOS RF PLL sythesizer
      
1584. 3W FM Transmitter
      
1585. Crystal radio
      
1586. Op-Amp Radio
      
1587. Car radio tunes the Amateur Bands
      
1588. Crystal set that requires no antenna
      
1589. 80m Direct Conversion Receiver
      
1590. A compact L-match ATU for portable use
      
1591. Morse Adaptor for your VHF/UHF FM rig
      
1592. An end-fed antenna, L-match coupler and resistive bridge for HF
      
1593. AM Broadcast Band Regenerative Receiver
      
1594. 50 MHz to 146 MHz Converter
      
1595. Hear Amateurs on your Shortwave Radio!
      
1596. Compact 20 14 MHz direct conversion receiver
      
1597. Hear Amateurs on your FM Radio!
      
1598. RF actuated CW monitor
      
1599. LF to HF Converter
      
1600. Super 80 ultra-simple SSB receiver for 3.5 MHz
      
1601. Class B series modulator
      
1602. L-Band PHEMT LNA for GPS, Inmarsat etc
      
1603. Advanced VHF power meter
      
1604. The MRX-40 Mini Receiver
      
1605. 23cm Data Transceiver
      
1606. External antenna for the GPS-38, Magellan 2000, or Eagle Explorer GPS receivers
      
1607. AM Broadcast Band Active Antenna
      
1608. Active antenna with gain
      
1609. Ham Band VFO
      
1610. HF Signal generator
      
1611. Simple AM Radio Receiver & Amplifier
      
1612. Bug detector
      
1613. 175KHz inductive pulse receiver (PDF)
      
1614. 200-400 MHz voltage controlled oscillator
      
1615. AM/FM/SW active antenna
      
1616. RF Sniffer <.5 to >500 MHz
      
1617. Demodulator Schematic/Design
      
1618. AM BCB radio receiver
      
1619. Regenerative shortwave receiver
      
1620. 7MHz SSB Transceiver
      
1621. DSBSC (Double Side Band Supressed Carrier)
      
1622. Frequency Synthesizer
      
1623. Digital Automatic Gain Control (AGC)
      
1624. Four Channel Wireless Transmitter and Receiver
      
1625. Talking receiver
      
1626. PLL synthesizing oscillator (1)
      
1627. PLL synthesizing oscillator (2)
      
1628. PLL synthesizing oscillator (3)
      
1629. 2N2222 40 Meter CW/DSB Transceiver
      
1630. Yaesu FT-736R doppler compensation
      
1631. Phased lock loop schematic
      
1632. 30M PSK31 Transceiver
      
1633. SOP receiver (PDF)
      
1634. SOP direct conversion receiver
      
1635. Receiver
      
1636. 30m direct conversion receiver
      
1637. Popcorn direct conversion receiver
      
1638. 40m direct conversion receiver
      
1639. 80m direct conversion receiver
      
1640. Huge LED Antenna Direction Display (part 1)
      
1641. Huge LED Antenna Direction Display (part 2)
      
1642. 136 kHz direct conversion receiver
      
1643. One Watt 2.45 GHz Linear Amplifier
      
1644. 222 MHz Transverter
      
1645. VFO from 2001 ARRL Handbook, page 17.74
      
1646. VFO from 2001 ARRL Handbook, page 14.20
      
1647. Assorted RF circuits
      
1648. 14MHz SSB 10mW Transceiver
      
1649. Building a Simple LF Exciter
      
1650. Yaesu band decoder schematic
      
1651. 23cm Wide-Band FM data transceiver for high-speed packet-radio
      
1652. VLF radio receiver schematic
      
1653. 5 watt, 80 meter QRP CW Transceiver
      
1654. How to Build a 300MHz AM, RF Remote Control System
      
1655. RF Modem Robotics Project
      
1656. PLL FM transmitter
      
1657. ICOM CI-V interface with RS232 RTS to PTT
      
1658. Improved FM Stereo Modulator
      
1659. Smooth Tone Clickless CW Sidetone Generator
      
1660. Variety of receiver converter projects
      
1661. One transistor FM receiver
      
1662. 42 Mc Band to 88 Mc Band (retrofit converter) Project
      
1663. Crystal radio circuits including diode performance comparison
      
1664. 50MHz Assistant (Preamp & Power Amp.)
      
1665. Bug detector
      
1666. Basic RF oscillator
      
1667. Radio Control Electric Switch
      
1668. 56K RF Modem
      
1669. 80M ARDF direction finder
      
      Voltar para o Topo
      Solar energy circuits and ideas for alternative energy for save the planet
1670. Sun tracking circuit for solar arrays
      
1671. Solar power recharger
      
1672. Solar power supply
      
1673. Solar charge controller
      
1674. Solar robots
      
1675. Solar Tracker
      
1676. 1381 solar engine
      
1677. D1 solar engine
      
1678. FLED solar engine
      
1679. PM1 solar engine
      
1680. Solar car array controller schematic
      
1681. Solar car battery monitor schematic
      
1682. Solar car brake controller schematic
      
1683. Solar car main controller schematic
      
1684. Solar car display controller schematic
      
1685. Solar car electrical design and circuit index
      
1686. Portable solar battery charger
      
1687. Sensor Electronic Tracker with H-Bridge Drive
      
1688. Sensor Electronic Tracker with Simple Solar Charge Controller
      
1689. Solar tracking control system
      
1690. LED7 solar tracker
      
1691. Solar step-down regulator
      
1692. Zener-based solar engine
      
1693. AA battery solar charger
      
1694. AA battery solar charger
      
1695. Solar Panel Charge Controller / Low Voltage Disconnect Circuit
      
1696. Solar Panel Current Meter
      
1697. SCC2 10 Amp Solar Charge Controller
      
1698. Solar Charged LED Flashlight
      
1699. AA battery solar charger
      
1700. Solar Panel Charge Controller / Low Voltage Disconnect Circuit
      
1701. Solar Panel Current Meter
      
1702. Solar cell Nicad charger
      
1703. Solar powered dock lamp flasher
      Voltar para o Topo
      Telephony and intercoms circuits
1704. Telephone recording circuit
      
1705. Infinity Transmitter Schematic and Plans
      
1706. Digisound ring modulator
      
1707. Incoming call indicator
      
1708. Telephone Ring Generator Using 60Hz Power Transformer
      
1709. Telephone Ring Generator Using Switching Power Supply
      
1710. Telephone In-Use LED Indicator
      
1711. Telephone In-Use Relay Circuit
      
1712. Telephone Audio Interface
      
1713. Telephone interfacing / caller ID using a PIC microcontroller
      
1714. Home made PBX / PABX
      
1715. Ringing Phone Light Flasher
      
1716. Phone Busy Indicator
      
1717. FM Telephone Bug
      
1718. Cut Phone Line Detector
      
1719. Simple Phone Tap
      
1720. Telephone Hold Button
      
1721. Telephone Recorder
      
1722. 300 baud modem circuit schematic
      
1723. DTMF Generator/Decoder
      
1724. Interface cables for various cell phones
      
1725. Telephone music on hold box
      
1726. Telephone ring controlled relay
      
1727. 1-line telephone status indicator (PDF)
      
1728. Line in use indicator (PDF)
      
1729. 4-line telephone status indicator (PDF)
      
1730. Caller ID decoder
      
1731. Telephone in use light
      
1732. Detecting a telephone RING
      
1733. Phone In-Use Light
      
1734. Phone to audio interface
      
1735. Phone Off-Hook Indicator
      
1736. 'phone rang' indicator light
      
1737. Phone Line to Audio
      
1738. Phone in-use
      
1739. Telephone Line Monitor
      
1740. Use old phones as an intercom
      
1741. Phone-In-Use indicator
      
1742. Hold function for Telephone
      
1743. Digital/Standard Phone Line Tester
      
1744. Caller ID decoder part 1
      
1745. Caller ID decoder part 2
      
1746. DTMF decoder / logger
      
1747. FM telephone bug
      
1748. Universal telephone hold
      
1749. Talking phone dial monitor
      
1750. Telephone line simulator
      
1751. Telephone privacy adapter
      
1752. Telephone ringing circuits
      
1753. Simple circuit to connect telephone equipment to audio mixer
      
1754. NCDS Interface Schematic for Nokia 3110, 8110, 8110i
      
1755. Assorted telephone circuits
      
1756. Greek telecard reader
      
1757. Phone ring circuit schematic
      
1758. Cut phone line detector
      
1759. Telephone autodialler
      
1760. Taxi phone automatic dialler
      
      Voltar para o Topo
      Instruments of bench test and measurement
1761. Lc meter com pic 16f84
1762. Indutímetro para multiteste
1763. Digital Capacitance Meter
1764. CAPACÍMETRO DIGITAL para frequencimetro
1765. CapPic
1766. A Surprisingly Accurate Digital LC Meter
1767. LC meter Polish
1768. Lc meter Russian
1769. Lc metre france
1770. Lc meter german
1771. LC meter
1772. Lc meter Turkish
1773. Frequency Counter
1774. Frequencimetro até 2GHz
1775. Frequency counter with a PIC and minimum hardware
1776. Frequêncimetro com PIC
1777. frequency counter with the 16F628
1778. PRESCALER para frequencímetro com Ds8629
1779. The 2002 DFD Digital Frequency meter
1780. Generador de funciones completo
1781. Wattmeter ROE
1782. AMP Hourmeter project
1783. Testador de Flyback
1784. Lâmpadas série
1785. PIC frequency meter by OM3CPH
1786. Progamador de Eprom Willen +   software
1787. Desmagnetizador de TRC
1788. Sonda para medición de Alto Voltaje
1789. LC METER Inductance and Capacitance meter
1790. Audible continuity tester
      
1791. Wire tracer
      
1792. Signal generator for signal tracer
      
1793. Electronic level
      
1794. Digital volt meter
      
1795. Adjustable continuity tested
      
1796. Frequency counter
      
1797. Tri-Waveform Generator
      
1798. 220V live wire-in-wall scanner
      
1799. Owens Bridge Inductance Measurement Device
      
1800. ESR Meter
      
1801. Line Output / Flyback transformer tester
      
1802. PC-Based Digital Storage Oscilloscope (DSOA)
      
1803. PC Based Digital Storage Oscilloscope Mk3
      
1804. Simple 6-Digit 40MHz Frequency Counter Module
      
1805. Automatic stud detector
      
1806. Capacitance meter
      
1807. Capacitance meter
      
1808. AC Line Current Detector
      
1809. Triangle and Squarewave Generator
      
1810. Signal tracer / injector
      
1811. Voltage probe
      
1812. Live line detector
      
1813. Grid dip meter
      
1814. PCB VSWR bridge
      
1815. Electric field & leakage detector
      
1816. Simple polarity detector
      
1817. RCM710 Electronic Scale
      
1818. 3 - 12 MHz Signal Generator
      
1819. Some simple test equipment to build
      
1820. RF Power Meter for the QRPer
      
1821. Dip Oscillator for HF
      
1822. Two Tone Audio Oscillator (use for SSB tests)
      
1823. Simple pH meter
      
1824. Temperature compensated pH meter
      
1825. pH meter with calibration
      
1826. Four Channel Oscilloscope Adapter
      
1827. Arbitrary Waveform Generator
      
1828. Digital Pressure Gauge
      
1829. Remote Field Strength Meter
      
1830. Digital frequency counter
      
1831. Function generator
      
1832. High / Low indicator
      
1833. AC/DC LED Indicator
      
1834. Micro ohm meter
      
1835. Micro volt probe
      
1836. MOSFET tester
      
1837. Power factor meter
      
1838. Ramp generator
      
1839. LASER/LED light output intensity meter (PDF)
      
1840. Frequency and capacitance meter
      
1841. Resistor decade box
      
1842. Simple light sensor adapter for oscilloscope
      
1843. Time Domain Reflectometer (TDR)
      
1844. 40MHz frequency counter using Atemel AVR 2312 microcontroller
      
1845. pH Meter
      
1846. Multi Wire Cable Tester
      
1847. Connection tester
      
1848. EMF field probe
      
1849. Function generator
      
1850. Logic probe
      
1851. Zener diode tester
      
1852. Mini DDS (direct digital synthesizer)
      
1853. LCD frequency counter (PIC16F84)
      
1854. Pulse Reading Logic Probe
      
1855. Pink Noise Generator for Audio Testing
      
1856. Audio Millivoltmeter
      
1857. Audio Test Oscillator
      
1858. Full Featured Transistor Tester
      
1859. Opamp Design and Test Board
      
1860. Microphone Circuit Test Oscillator
      
1861. Distortion Analyser
      
1862. Self Oscillating Amplifier for Distortion Testing
      
1863. 120MHz frequency counter
      
1864. Capacitance meter that connects to multimeter
      
1865. Transistor tester and signal injector
      
1866. Continuity tester
      
1867. Square wave oscillator (555)
      
1868. Build a Magnetic Field Immunity Tester
      
1869. 555 Timer IC Tester
      
1870. 555 go / no-go tester
      
1871. 12V Lead-Acid Battery Monitor
      
1872. Continuity tester 2
      
1873. Continuity tester
      
1874. Logic probe
      
1875. 4-channel DSO for oscilloscope
      
1876. Field strength meter for the 137 kHz band
      
1877. In-circuit electrolytic tester
      
1878. PIC logic probe with pulser
1879. 
      Voltar para o Topo Timers and oscillators
1880. Budget timer
      
1881. Long period timer
      
1882. 555 time delay circuit
      
1883. Low frequency clock
      
1884. Countdown timer with relay
      
1885. DDS using AD9835
      
1886. 1 Second Time Base From Crystal Osc.
      
1887. Power-On Time Delay Relay Circuit
      
1888. Low Voltage , High Current Time Delay Circuit
      
1889. Power-Off Time Delay Relay Circuit
      
1890. Generating a Delayed Pulse With a dual 555 Timer
      
1891. 1KHz Sinewave generator
      
1892. Timed beeper
      
1893. GPS receiver clock circuit
      
1894. Time Delay Relay
      
1895. Time Delay Relay
      
1896. Wide-swing Variable Crystal Oscillator
      
1897. Circuit that momentarily closes a pair of contacts at long intervals
      
1898. Onboard Fogger Timer
      
1899. Colpitts 1 to 20 MHz Crystal Oscillator
      
1900. Divide By 1-1/2 Circuit
      
1901. Simple sinewave generator
      
1902. Two Transistor Sine Wave Oscillator
      
1903. 10 Hz to 10 Khz VCO with Square and Triangle wave
      
1904. Line powered 60Hz clock generator (PDF)
      
1905. Micro-power pulse generator (PDF)
      
1906. Darkroom camera shutter timer
      
1907. Divide by 1.5 counter (PFD)
      
1908. High-output square wave generator (PDF)
      
1909. D Flip-flot one-shot circuits (PDF)
      
1910. Clock divider
      
1911. Clock doubler
      
1912. CMOS oscillator
      
1913. Crystal 32.768KHz CMOS Oscillator
      
1914. Crystal oscillator
      
1915. Cheap 40KHz clock
      
1916. Stable 40KHz clock
      
1917. 'Rounding Off' a square wave
      
1918. Switch debounce using 555
      
1919. Square wave to sine wave converter
      
1920. Day / Night / 24 Hour Select Sensor
      
1921. One transistor timer
      
1922. Variable timer
      
1923. Micropower pulse generator (PDF)
      
1924. Square wave oscillator
      
1925. Triangle wave oscillator
      
1926. Sawtooth wave oscillator
      
1927. Sine/Cosine wave oscillator
      
1928. 555 timer
      
1929. 555 oscillator
      
1930. Stable multivibrator (IC)
      
1931. Stable multivibrator (Transistor)
      
1932. Timer based on Microchip PIC16F628
      
1933. Push Button Switch Debouncer
      
1934. Square wave oscillator
      
1935. 5 to 30 Minute Timer
      
1936. NE555 Basic Monostable
      
1937. Mini DDS (Direct Digital Synthesis)
      
1938. Astable Multivibrator
      
1939. High Precision GPS/TV controlled Reference Oscillator
      
1940. TV based Receiver for a Standard Frequency Generator
      
1941. AD9852 DDS schematic
      
1942. A GPS receiver based frequency standard
      
1943. Monostable multivibrator
      
1944. Clock generator
      
1945. 555 Timer Tutorial + Circuits
      
1946. Versatile electronic timer
1947. 
      
      Voltar para o Topo Transmitters FM, AM, TV


1948. Transmissor potente de FM com 2n2218
1949. Transmissor de tv1
1950. Transmissor de TV com lm1889n
1951. Micro Transmissor de fm para espionagem
1952. FM Stereo Transmitter
1953. gerador de FM para a faixa de 88 a 108 MHz
1954. The stereo FM Micromitter
1955. VHF video trasnmitter
1956. Transmisor de televisión
1957. Emissor Parcial de TVA
1958. Li'l 7 AM Transmitter Schematic
      
1959. Wireless microphone
      
1960. XTAL locked tone transmitter
      
1961. AM oscillator for wireless microphones
      
1962. Wireless microphone
      
1963. 1W CW Transmitter
      
1964. 433MHz transmitter using SAW resonator
      
1965. A 3m (100 MHz) small bug
      
1966. Basic FM Transmitter
      
1967. Micro Power AM Broadcast Transmitter
      
1968. FM Beacon Transmitter (88-108 MHz)
      
1969. 1 valve CW transmitter
      
1970. 250mW HF CW transmitter
      
1971. 2 valve CW transmitter
      
1972. Transmitter using LM317
      
1973. 5 Watt HF CW transmitter
      
1974. Simple FM microphone
      
1975. FM bug
      
1976. High power FM bug
      
1977. 27MHz AM/CW transmitter
      
1978. Easy 2-meter transmitter
      
1979. QRP HF transmitter
      
1980. Spark gap transmitter
      
1981. QRP SSB transmitter
      
1982. Crystal controlled FM transmitter
      
1983. 150mW FM transmitter
      
1984. FM transmitter
      
1985. Two Valve 40m CW Transmitter
      
1986. Frequency agile 80m CW QRP transmitter
      
1987. 80 metre DSB transmitter
      
1988. One Valve CW transmitter
      
1989. Simple Low FER Transmitter
      
1990. 7Mhz AM/CW Amateur Radio Transmitter
      
1991. VHF FM transmitter
      
1992. Simple FM transmitter
      
1993. Wireless microphone
      
1994. Shortwave radio transmitter
      
1995. 175KHz inductive pulse transmitter (PDF)
      
1996. 7MHz QRP transmitter
      
1997. Small Radio Transmitter
      
1998. FM Telephone Transmitter
      
1999. Tracking transmitter
      
2000. 5W PLL Transmitter
      
2001. Miniature FM transmitter
      
2002. Sensitive FM transmitter
      
2003. Simple RF transmitter
      
2004. 1.5 volt tracking transmitter
      
2005. Tracking transmitter
      
2006. Micro Power FM Broadcasting Circuits
      
2007. Low Power FM Transmitter
      
2008. RF/SS Handie Hopper Transmitter Schematic
      
2009. 30-Meter QRP Transmitter for Morse Code
      
2010. Miniature FM Transmitter #1
      
2011. Miniature FM Transmitter #2
      
2012. Miniature FM Transmitter #3
      
2013. Light sensing RF transmitter
      
2014. Micro-Spy with FETs
      
2015. Micro-Spy with USW
      
2016. Micro-Spy with TTL
      
      Voltar para o Topo
      Video related circuits and transmiters
2017. Transmissor de tv1
2018. Transmissor de tv com lm1889n
2019. Amplificador / Inversor de Vídeo
2020. Video Clock Superimposer
      
2021. Video clock superimposer using PIC16C711
      
2022. Simple AV (audio / video) wireless transmitter
      
2023. Audio / video distribution amplifier
      
2024. 10GHz video link
      
2025. Experimental macrovision remover
      
2026. 8 x 8 Audio-video switch
      
2027. VHF/UHF TV modulator
      
2028. LH0032 video amplifier
      
2029. LM359N video amplifier
      
2030. Macrovision code remover
      
2031. Driver for multiple VGA monitors
      
2032. CCD (charge coupled device) support board
      
2033. Closed-Caption Decoder
      
2034. PIC-Tock video clock
      
2035. Video/Audio Wireless Transmitter
      
2036. Video signal amplifier
      
2037. RGB video digitizer
      
2038. Color Bar Generator
      
2039. Microcontroller test pattern generator
      
2040. NTSC Video Distribution Amplifier
      
2041. Commodore RF modulator
      
2042. Video signal edge enhancement
      
2043. Video amplifier
      
2044. Video/Audio Wireless Transmitter
      
2045. 4 Stage 555 Timer for Video Cam Control
      
2046. Digital volt meter with video output
      
2047. TV/Radio antenna cable galvanic isolator
      
2048. S-video to composite video adapter
      
2049. VGA converter for video projectors and fixed frequency monitors
      
2050. VGA to TV converter
      
2051. VGA to PAL and NTSC converter
      
2052. PIC micro frame grabber (TDA8708)
      
2053. Low cost audio/video modulator and transmitter
      
2054. Many video amplifier circuits includiing transmission over UTP (PDF)
      
2055. Commodore 64 Video Modulator 251025 Schematics
      
2056. Commodore 64 Video Modulator 251696 Schematics
      
2057. TV RGB signal output from a SVGA graphics card
      
2058. Macrovision removal
      
2059. AVR (AT90S2313) composite PAL colour bar generator
      
2060. Homebuilt video digitizer Mark I
      
2061. Homebuilt video digitizer Mark II
2062. TV transmitter
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