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, July 05, 2025		 12VDC To 120VAC Inverter53
One Tube Regenerative Radio28
Yesterday
Friday, July 04, 2025		 12VDC To 120VAC Inverter73
FM Transmitter50
Of All Time 12VDC To 120VAC Inverter1,550,008
FM Transmitter1,023,282

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 232,592 61 *
Car Alarm Arming Horn Beep Canceller bob 141,600 6 *
Wireless Auto Tachometer 349,426 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 164,965 29 *
Parallel (Printer) Port Interface 294,253 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 455,035 63 *
3 Channel Spectrum Analyzer 229,219 20
40W Fluorescent Lamp Inverter Bart Milnes 336,092 60 *
Adjustable Strobe Light 316,453 36
Black Light 290,369 29
Colour (Sound) Organ 297,983 36
Electronic Dice NEW! 195,313 10 *
Fantastic Atom Expander 208,286 25
Flash Slave Trigger 227,748 18 *
Infa-Red Remote Control 645,431 216 *
IR Remote Extender NEW! 138,934 3 *
IR Remote Jammer Carl 273,399 110 *
IR Remote Switch NEW! 163,291 9 *
LASER Transmitter/Receiver 425,216 92
LED Chaser 454,197 83 *
LED Metronome NEW! 105,186 3 *
LED Thermometer 212,480 22 *
Light/Dark Detector 311,725 90 *
Simple Colour Organ 142,770 11 *
Strobe Light 281,635 27 *
TRIAC Light Dimmer 561,182 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 367,303 122 *
Electromagnetic Levitator NEW! 150,103 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 932,238 214 *
AC Motor Speed Controller 401,079 29 *
Air Flow Detector 257,813 54 *
Digital Keypad Combination Lock 207,660 20
Low Voltage Alarm 235,328 58 *
Pine Racecar Victory Judge 107,843 1 *
Pulse Width Modulation DC Motor Control 663,075 94
Rain Detector 311,347 112 *
Simple Lie Detector 572,624 323
Simple Polarity Tester Dudley LeRoux 171,286 13 *
Simple Servo Controller 228,067 22 *
Simple Touch Switch NEW! 176,138 6 *
Simple Two Speed Contactor DC Motor Controller 211,592 21 *
Stepper Motor Controller 759,889 120 *
Time Delay Relay 563,294 88
Time Delay Relay II jawaharlal@excite.com 253,832 39 *
Touch Switch 296,481 51 *
Video Activated Relay 127,317 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 187,963 10 *
Water Detector With Sump/Bilge Pump Controller 158,838 18 *
Wire Loop Alarm Alex Meaden 211,432 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 326,083 25 *
12VDC To 120VAC Inverter 1,550,008 691
6V to 12V Converter 536,615 121
Automatic 12V Lead Acid Battery Charger 946,599 248
Automatic Load Sensing Power Switch 173,738 16 *
Car Battery Charger 891,842 159 *
Dual Polarity Power Supply 378,760 84 *
Fixed Voltage Power Supply 318,352 52 *
High Current Power Supply 348,433 66 *
High Voltage High Current Power Supply 270,950 35 *
LASER Power Supply 303,735 28
Portable CD Player Adapter For Car 218,410 12 *
Power Supply 747,697 259 *
Solid State Tesla Coil NEW! 153,998 4
Solid State Tesla Coil/High Voltage Generator 454,027 51
Transformerless Power Supply 470,793 117 *
Voltage Inverter 349,694 51 *
Voltage Inverter II 210,323 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 592,927 182
3 Watt FM Transmitter Rae XL Tkacik 345,299 83 *
50 Watt Amplifier 516,821 74
8 Note Tune Player 146,668 12 *
8 Watt Audio Amp 382,500 67 *
Aircraft Radio Communications Receiver 287,767 50 *
Crystal Radio 166,448 53 *
Digital Volume Control 346,705 47 *
Electronic Stethoscope 329,634 142 *
FET Audio Mixer 351,263 41
FM Transmitter 1,023,282 420
Guitar Fuzz Effect 255,553 54 *
Microphone Mixer Anatoly I. Shikhatov 257,649 26 *
Mono To Stereo Synthesizer oRbEq 141,223 18 *
One Tube Regenerative Radio NEW! 155,538 4 *
Op Amp Radio 398,929 80 *
Single Chip AM Radio NEW! 106,245 4 *
Single Chip FM Radio NEW! 180,432 1 *
Sound Level Meter 349,451 51 *
Stereo Tube Amplifier Weslee Kinsler 275,504 15 *
Tone Control 317,395 31
Transistor Organ 207,310 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,115 27 *
FM Telephone Bug 240,671 57
Phone Busy Indicator 219,809 24 *
Remote Telephone Ringer 123,560 3 *
Ringing Phone Light Flasher 225,905 35 *
Simple Phone Tap Derek Tombrello 389,781 98 *
Telephone Hold Button 134,783 10
Telephone Recorder 222,522 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.