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
Tuesday, March 03, 2026		 Computerize Your Room/Home357
12VDC To 120VAC Inverter41
Yesterday
Monday, March 02, 2026		 Computerize Your Room/Home115
12V To 24V DC-DC Converter30
Of All Time 12VDC To 120VAC Inverter1,560,944
FM Transmitter1,032,010

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,252 61 *
Car Alarm Arming Horn Beep Canceller bob 144,915 6 *
Wireless Auto Tachometer 353,668 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 167,949 29 *
Parallel (Printer) Port Interface 299,415 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 459,584 63 *
3 Channel Spectrum Analyzer 233,626 20
40W Fluorescent Lamp Inverter Bart Milnes 340,110 60 *
Adjustable Strobe Light 320,854 36
Black Light 295,579 29
Colour (Sound) Organ 302,912 36
Electronic Dice NEW! 199,428 10 *
Fantastic Atom Expander 211,779 25
Flash Slave Trigger 231,944 18 *
Infa-Red Remote Control 650,589 216 *
IR Remote Extender NEW! 142,933 3 *
IR Remote Jammer Carl 277,759 110 *
IR Remote Switch NEW! 167,231 9 *
LASER Transmitter/Receiver 429,971 92
LED Chaser 459,596 83 *
LED Metronome NEW! 108,970 3 *
LED Thermometer 215,914 22 *
Light/Dark Detector 315,412 90 *
Simple Colour Organ 146,309 11 *
Strobe Light 285,287 27 *
TRIAC Light Dimmer 566,115 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,355 122 *
Electromagnetic Levitator NEW! 153,693 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 938,949 214 *
AC Motor Speed Controller 407,059 29 *
Air Flow Detector 261,644 54 *
Digital Keypad Combination Lock 211,397 20
Low Voltage Alarm 239,558 58 *
Pine Racecar Victory Judge 111,142 1 *
Pulse Width Modulation DC Motor Control 668,351 94
Rain Detector 315,382 112 *
Simple Lie Detector 577,693 323
Simple Polarity Tester Dudley LeRoux 175,498 13 *
Simple Servo Controller 232,313 22 *
Simple Touch Switch NEW! 180,484 6 *
Simple Two Speed Contactor DC Motor Controller 215,708 21 *
Stepper Motor Controller 767,236 120 *
Time Delay Relay 567,836 88
Time Delay Relay II jawaharlal@excite.com 258,028 39 *
Touch Switch 300,660 51 *
Video Activated Relay 130,731 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 192,816 10 *
Water Detector With Sump/Bilge Pump Controller 162,796 18 *
Wire Loop Alarm Alex Meaden 215,004 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 333,556 25 *
12VDC To 120VAC Inverter 1,560,944 691
6V to 12V Converter 541,987 121
Automatic 12V Lead Acid Battery Charger 952,425 248
Automatic Load Sensing Power Switch 177,752 16 *
Car Battery Charger 897,181 159 *
Dual Polarity Power Supply 383,961 84 *
Fixed Voltage Power Supply 322,295 52 *
High Current Power Supply 353,946 66 *
High Voltage High Current Power Supply 275,298 35 *
LASER Power Supply 307,901 28
Portable CD Player Adapter For Car 222,386 12 *
Power Supply 752,559 259 *
Solid State Tesla Coil NEW! 159,325 4
Solid State Tesla Coil/High Voltage Generator 460,026 51
Transformerless Power Supply 475,414 117 *
Voltage Inverter 355,954 51 *
Voltage Inverter II 214,395 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,418 182
3 Watt FM Transmitter Rae XL Tkacik 351,382 83 *
50 Watt Amplifier 521,919 74
8 Note Tune Player 150,184 12 *
8 Watt Audio Amp 388,254 67 *
Aircraft Radio Communications Receiver 292,854 50 *
Crystal Radio 171,979 53 *
Digital Volume Control 351,455 47 *
Electronic Stethoscope 334,395 142 *
FET Audio Mixer 355,382 41
FM Transmitter 1,032,010 420
Guitar Fuzz Effect 260,820 54 *
Microphone Mixer Anatoly I. Shikhatov 261,834 26 *
Mono To Stereo Synthesizer oRbEq 145,548 18 *
One Tube Regenerative Radio NEW! 162,690 4 *
Op Amp Radio 404,025 80 *
Single Chip AM Radio NEW! 110,161 4 *
Single Chip FM Radio NEW! 185,471 1 *
Sound Level Meter 353,838 51 *
Stereo Tube Amplifier Weslee Kinsler 280,652 15 *
Tone Control 322,262 31
Transistor Organ 211,581 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,487 27 *
FM Telephone Bug 243,924 57
Phone Busy Indicator 223,370 24 *
Remote Telephone Ringer 127,007 3 *
Ringing Phone Light Flasher 230,806 35 *
Simple Phone Tap Derek Tombrello 393,537 98 *
Telephone Hold Button 138,006 10
Telephone Recorder 225,884 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.