Electronic Circuits

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Here are some neat circuits you might want to try. The schematics and printed circuit board patterns are GIF's, and may show up different on some browsers. You might want to save the images (especially the PC board patterns) to your hard drive, load them into a photo editor (Photoshop, Paint Shop Pro, The GIMP, etc.) and adjust the size before you transfer the pattern to a board. Printed circuit board patterns are available possible. This page is always under construction and there will be new additions from time to time. Some of these circuits were designed by me, most are not. Whenever possible I have tried to credit the author of a circuit but since many of these circuits are from my personal collection that I have gathered over a period of many years, this information is not always available.

You can rank circuits according to how much you like a circuit by clicking on the lightning bolt icons. These ranks can be based on how much you like a circuit, whether a circuit worked or didn't work for you, or how useful you found a circuit. Additionally you can add your own comments at the bottom of each circuit by filling out the form.

Circuit Catagories

Circuits are divided into categories as listed below.

Catagory Circuits
Auto 3
Computer 2
Light/Laser 21
Major Projects 2
Other 21
Power Supply 18
Sound/Radio 22
Telephone 8

Some circuits in this list have little astrisk (*) markers beside them which give a basic amount of information regarding whether the circuit has been designed, tested or modified by the webmaster.

Marker Description
* The circuit has not been tested by me. Therefore, I will offer no gaurantee that they will work.
* This circuit has been designed by me.
* This circuit was not designed by me, but was modified by me.

Most Popular Circuits

The most popular circuits of today, yesterday and all time can be found below.

When Circuit Views
Today
Saturday, February 22, 2025		 Op Amp Radio19
12VDC To 120VAC Inverter9
Yesterday
Friday, February 21, 2025		 12VDC To 120VAC Inverter38
Stepper Motor Controller35
Of All Time 12VDC To 120VAC Inverter1,543,122
FM Transmitter1,018,277

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,129 61 *
Car Alarm Arming Horn Beep Canceller bob 139,479 6 *
Wireless Auto Tachometer 346,792 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,808 29 *
Parallel (Printer) Port Interface 291,237 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,186 63 *
3 Channel Spectrum Analyzer 226,268 20
40W Fluorescent Lamp Inverter Bart Milnes 333,601 60 *
Adjustable Strobe Light 313,390 36
Black Light 286,557 29
Colour (Sound) Organ 295,097 36
Electronic Dice NEW! 192,691 10 *
Fantastic Atom Expander 206,085 25
Flash Slave Trigger 225,115 18 *
Infa-Red Remote Control 641,832 216 *
IR Remote Extender NEW! 136,405 3 *
IR Remote Jammer Carl 270,548 110 *
IR Remote Switch NEW! 160,760 9 *
LASER Transmitter/Receiver 421,994 92
LED Chaser 451,068 83 *
LED Metronome NEW! 102,785 3 *
LED Thermometer 210,197 22 *
Light/Dark Detector 309,381 90 *
Simple Colour Organ 140,476 11 *
Strobe Light 279,228 27 *
TRIAC Light Dimmer 558,228 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,531 122 *
Electromagnetic Levitator NEW! 147,750 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,367 214 *
AC Motor Speed Controller 397,640 29 *
Air Flow Detector 255,412 54 *
Digital Keypad Combination Lock 205,410 20
Low Voltage Alarm 232,841 58 *
Pine Racecar Victory Judge 105,689 1 *
Pulse Width Modulation DC Motor Control 660,027 94
Rain Detector 308,748 112 *
Simple Lie Detector 569,520 323
Simple Polarity Tester Dudley LeRoux 168,940 13 *
Simple Servo Controller 225,358 22 *
Simple Touch Switch NEW! 173,593 6 *
Simple Two Speed Contactor DC Motor Controller 208,919 21 *
Stepper Motor Controller 755,061 120 *
Time Delay Relay 560,287 88
Time Delay Relay II jawaharlal@excite.com 251,339 39 *
Touch Switch 293,795 51 *
Video Activated Relay 125,079 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,474 10 *
Water Detector With Sump/Bilge Pump Controller 156,592 18 *
Wire Loop Alarm Alex Meaden 209,078 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 322,577 25 *
12VDC To 120VAC Inverter 1,543,122 691
6V to 12V Converter 533,349 121
Automatic 12V Lead Acid Battery Charger 943,139 248
Automatic Load Sensing Power Switch 171,290 16 *
Car Battery Charger 888,611 159 *
Dual Polarity Power Supply 375,804 84 *
Fixed Voltage Power Supply 315,847 52 *
High Current Power Supply 345,319 66 *
High Voltage High Current Power Supply 268,248 35 *
LASER Power Supply 300,992 28
Portable CD Player Adapter For Car 215,963 12 *
Power Supply 744,614 259 *
Solid State Tesla Coil NEW! 151,083 4
Solid State Tesla Coil/High Voltage Generator 450,422 51
Transformerless Power Supply 467,937 117 *
Voltage Inverter 345,893 51 *
Voltage Inverter II 207,720 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,116 182
3 Watt FM Transmitter Rae XL Tkacik 341,750 83 *
50 Watt Amplifier 513,599 74
8 Note Tune Player 144,289 12 *
8 Watt Audio Amp 379,167 67 *
Aircraft Radio Communications Receiver 284,411 50 *
Crystal Radio 163,399 53 *
Digital Volume Control 343,391 47 *
Electronic Stethoscope 326,726 142 *
FET Audio Mixer 348,340 41
FM Transmitter 1,018,277 420
Guitar Fuzz Effect 252,390 54 *
Microphone Mixer Anatoly I. Shikhatov 255,003 26 *
Mono To Stereo Synthesizer oRbEq 138,461 18 *
One Tube Regenerative Radio NEW! 150,965 4 *
Op Amp Radio 395,445 80 *
Single Chip AM Radio NEW! 103,742 4 *
Single Chip FM Radio NEW! 177,455 1 *
Sound Level Meter 346,549 51 *
Stereo Tube Amplifier Weslee Kinsler 272,805 15 *
Tone Control 314,482 31
Transistor Organ 204,399 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,936 27 *
FM Telephone Bug 238,477 57
Phone Busy Indicator 217,378 24 *
Remote Telephone Ringer 121,416 3 *
Ringing Phone Light Flasher 223,095 35 *
Simple Phone Tap Derek Tombrello 387,316 98 *
Telephone Hold Button 132,425 10
Telephone Recorder 220,275 55 *

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All material marked as mine is property of Aaron Cake. You may, however, distribute it as much as you want, with or without credit to me. Just don't claim credit for it yourself, and it would be nice if you included a link back to my page. All other material is property of its authors.