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
Friday, November 07, 2025		 Video Stabilizer/MacroVision Removal15
LED Metronome15
Yesterday
Thursday, November 06, 2025		 FM Transmitter65
Video Stabilizer/MacroVision Removal58
Of All Time 12VDC To 120VAC Inverter1,555,689
FM Transmitter1,027,914

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 234,627 61 *
Car Alarm Arming Horn Beep Canceller bob 143,373 6 *
Wireless Auto Tachometer 351,703 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 166,631 29 *
Parallel (Printer) Port Interface 297,196 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 457,542 63 *
3 Channel Spectrum Analyzer 231,650 20
40W Fluorescent Lamp Inverter Bart Milnes 338,196 60 *
Adjustable Strobe Light 318,971 36
Black Light 293,249 29
Colour (Sound) Organ 300,710 36
Electronic Dice NEW! 197,615 10 *
Fantastic Atom Expander 210,145 25
Flash Slave Trigger 229,973 18 *
Infa-Red Remote Control 648,370 216 *
IR Remote Extender NEW! 141,090 3 *
IR Remote Jammer Carl 275,852 110 *
IR Remote Switch NEW! 165,412 9 *
LASER Transmitter/Receiver 427,824 92
LED Chaser 457,166 83 *
LED Metronome NEW! 107,273 3 *
LED Thermometer 214,415 22 *
Light/Dark Detector 313,787 90 *
Simple Colour Organ 144,748 11 *
Strobe Light 283,673 27 *
TRIAC Light Dimmer 563,783 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 369,897 122 *
Electromagnetic Levitator NEW! 152,079 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 935,538 214 *
AC Motor Speed Controller 404,495 29 *
Air Flow Detector 259,838 54 *
Digital Keypad Combination Lock 209,734 20
Low Voltage Alarm 237,620 58 *
Pine Racecar Victory Judge 109,675 1 *
Pulse Width Modulation DC Motor Control 666,036 94
Rain Detector 313,495 112 *
Simple Lie Detector 575,478 323
Simple Polarity Tester Dudley LeRoux 173,518 13 *
Simple Servo Controller 230,419 22 *
Simple Touch Switch NEW! 178,450 6 *
Simple Two Speed Contactor DC Motor Controller 213,871 21 *
Stepper Motor Controller 764,073 120 *
Time Delay Relay 565,797 88
Time Delay Relay II jawaharlal@excite.com 256,088 39 *
Touch Switch 298,781 51 *
Video Activated Relay 129,228 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 190,410 10 *
Water Detector With Sump/Bilge Pump Controller 160,827 18 *
Wire Loop Alarm Alex Meaden 213,454 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 330,198 25 *
12VDC To 120VAC Inverter 1,555,689 691
6V to 12V Converter 539,489 121
Automatic 12V Lead Acid Battery Charger 949,530 248
Automatic Load Sensing Power Switch 175,923 16 *
Car Battery Charger 894,795 159 *
Dual Polarity Power Supply 381,497 84 *
Fixed Voltage Power Supply 320,523 52 *
High Current Power Supply 351,484 66 *
High Voltage High Current Power Supply 273,269 35 *
LASER Power Supply 306,040 28
Portable CD Player Adapter For Car 220,482 12 *
Power Supply 750,298 259 *
Solid State Tesla Coil NEW! 156,744 4
Solid State Tesla Coil/High Voltage Generator 457,190 51
Transformerless Power Supply 473,251 117 *
Voltage Inverter 353,275 51 *
Voltage Inverter II 212,477 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 595,340 182
3 Watt FM Transmitter Rae XL Tkacik 348,831 83 *
50 Watt Amplifier 519,649 74
8 Note Tune Player 148,488 12 *
8 Watt Audio Amp 385,792 67 *
Aircraft Radio Communications Receiver 290,504 50 *
Crystal Radio 169,367 53 *
Digital Volume Control 349,195 47 *
Electronic Stethoscope 332,311 142 *
FET Audio Mixer 353,519 41
FM Transmitter 1,027,914 420
Guitar Fuzz Effect 258,346 54 *
Microphone Mixer Anatoly I. Shikhatov 259,935 26 *
Mono To Stereo Synthesizer oRbEq 143,524 18 *
One Tube Regenerative Radio NEW! 159,591 4 *
Op Amp Radio 401,750 80 *
Single Chip AM Radio NEW! 108,273 4 *
Single Chip FM Radio NEW! 183,160 1 *
Sound Level Meter 351,809 51 *
Stereo Tube Amplifier Weslee Kinsler 278,196 15 *
Tone Control 319,984 31
Transistor Organ 209,585 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,935 27 *
FM Telephone Bug 242,450 57
Phone Busy Indicator 221,687 24 *
Remote Telephone Ringer 125,245 3 *
Ringing Phone Light Flasher 228,517 35 *
Simple Phone Tap Derek Tombrello 391,723 98 *
Telephone Hold Button 136,497 10
Telephone Recorder 224,315 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.