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/Home330
12VDC To 120VAC Inverter37
Yesterday
Monday, March 02, 2026		 Computerize Your Room/Home115
12V To 24V DC-DC Converter30
Of All Time 12VDC To 120VAC Inverter1,560,940
FM Transmitter1,032,007

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,249 61 *
Car Alarm Arming Horn Beep Canceller bob 144,910 6 *
Wireless Auto Tachometer 353,665 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 167,947 29 *
Parallel (Printer) Port Interface 299,408 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 459,580 63 *
3 Channel Spectrum Analyzer 233,625 20
40W Fluorescent Lamp Inverter Bart Milnes 340,108 60 *
Adjustable Strobe Light 320,851 36
Black Light 295,573 29
Colour (Sound) Organ 302,908 36
Electronic Dice NEW! 199,425 10 *
Fantastic Atom Expander 211,777 25
Flash Slave Trigger 231,936 18 *
Infa-Red Remote Control 650,586 216 *
IR Remote Extender NEW! 142,929 3 *
IR Remote Jammer Carl 277,754 110 *
IR Remote Switch NEW! 167,230 9 *
LASER Transmitter/Receiver 429,967 92
LED Chaser 459,589 83 *
LED Metronome NEW! 108,964 3 *
LED Thermometer 215,909 22 *
Light/Dark Detector 315,408 90 *
Simple Colour Organ 146,306 11 *
Strobe Light 285,282 27 *
TRIAC Light Dimmer 566,111 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,328 122 *
Electromagnetic Levitator NEW! 153,691 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 938,943 214 *
AC Motor Speed Controller 407,057 29 *
Air Flow Detector 261,640 54 *
Digital Keypad Combination Lock 211,395 20
Low Voltage Alarm 239,555 58 *
Pine Racecar Victory Judge 111,139 1 *
Pulse Width Modulation DC Motor Control 668,349 94
Rain Detector 315,379 112 *
Simple Lie Detector 577,692 323
Simple Polarity Tester Dudley LeRoux 175,497 13 *
Simple Servo Controller 232,311 22 *
Simple Touch Switch NEW! 180,481 6 *
Simple Two Speed Contactor DC Motor Controller 215,704 21 *
Stepper Motor Controller 767,232 120 *
Time Delay Relay 567,832 88
Time Delay Relay II jawaharlal@excite.com 258,025 39 *
Touch Switch 300,653 51 *
Video Activated Relay 130,728 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 192,814 10 *
Water Detector With Sump/Bilge Pump Controller 162,793 18 *
Wire Loop Alarm Alex Meaden 215,002 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 333,550 25 *
12VDC To 120VAC Inverter 1,560,940 691
6V to 12V Converter 541,982 121
Automatic 12V Lead Acid Battery Charger 952,419 248
Automatic Load Sensing Power Switch 177,751 16 *
Car Battery Charger 897,173 159 *
Dual Polarity Power Supply 383,958 84 *
Fixed Voltage Power Supply 322,292 52 *
High Current Power Supply 353,943 66 *
High Voltage High Current Power Supply 275,294 35 *
LASER Power Supply 307,898 28
Portable CD Player Adapter For Car 222,383 12 *
Power Supply 752,551 259 *
Solid State Tesla Coil NEW! 159,322 4
Solid State Tesla Coil/High Voltage Generator 460,023 51
Transformerless Power Supply 475,409 117 *
Voltage Inverter 355,952 51 *
Voltage Inverter II 214,389 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,414 182
3 Watt FM Transmitter Rae XL Tkacik 351,380 83 *
50 Watt Amplifier 521,917 74
8 Note Tune Player 150,181 12 *
8 Watt Audio Amp 388,247 67 *
Aircraft Radio Communications Receiver 292,850 50 *
Crystal Radio 171,972 53 *
Digital Volume Control 351,451 47 *
Electronic Stethoscope 334,390 142 *
FET Audio Mixer 355,377 41
FM Transmitter 1,032,007 420
Guitar Fuzz Effect 260,814 54 *
Microphone Mixer Anatoly I. Shikhatov 261,831 26 *
Mono To Stereo Synthesizer oRbEq 145,544 18 *
One Tube Regenerative Radio NEW! 162,686 4 *
Op Amp Radio 404,020 80 *
Single Chip AM Radio NEW! 110,158 4 *
Single Chip FM Radio NEW! 185,465 1 *
Sound Level Meter 353,835 51 *
Stereo Tube Amplifier Weslee Kinsler 280,646 15 *
Tone Control 322,254 31
Transistor Organ 211,576 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,484 27 *
FM Telephone Bug 243,922 57
Phone Busy Indicator 223,368 24 *
Remote Telephone Ringer 127,004 3 *
Ringing Phone Light Flasher 230,799 35 *
Simple Phone Tap Derek Tombrello 393,535 98 *
Telephone Hold Button 138,005 10
Telephone Recorder 225,880 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.