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, July 01, 2025		 12VDC To 120VAC Inverter30
Guitar Fuzz Effect20
Yesterday
Monday, June 30, 2025		 12VDC To 120VAC Inverter58
FM Transmitter50
Of All Time 12VDC To 120VAC Inverter1,549,733
FM Transmitter1,023,114

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 232,531 61 *
Car Alarm Arming Horn Beep Canceller bob 141,558 6 *
Wireless Auto Tachometer 349,350 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 164,902 29 *
Parallel (Printer) Port Interface 294,167 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 454,965 63 *
3 Channel Spectrum Analyzer 229,152 20
40W Fluorescent Lamp Inverter Bart Milnes 336,025 60 *
Adjustable Strobe Light 316,381 36
Black Light 290,281 29
Colour (Sound) Organ 297,917 36
Electronic Dice NEW! 195,235 10 *
Fantastic Atom Expander 208,237 25
Flash Slave Trigger 227,655 18 *
Infa-Red Remote Control 645,290 216 *
IR Remote Extender NEW! 138,871 3 *
IR Remote Jammer Carl 273,318 110 *
IR Remote Switch NEW! 163,239 9 *
LASER Transmitter/Receiver 425,111 92
LED Chaser 454,113 83 *
LED Metronome NEW! 105,135 3 *
LED Thermometer 212,423 22 *
Light/Dark Detector 311,668 90 *
Simple Colour Organ 142,711 11 *
Strobe Light 281,587 27 *
TRIAC Light Dimmer 561,106 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 367,231 122 *
Electromagnetic Levitator NEW! 150,046 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 932,161 214 *
AC Motor Speed Controller 400,969 29 *
Air Flow Detector 257,753 54 *
Digital Keypad Combination Lock 207,603 20
Low Voltage Alarm 235,268 58 *
Pine Racecar Victory Judge 107,798 1 *
Pulse Width Modulation DC Motor Control 662,988 94
Rain Detector 311,280 112 *
Simple Lie Detector 572,523 323
Simple Polarity Tester Dudley LeRoux 171,224 13 *
Simple Servo Controller 227,994 22 *
Simple Touch Switch NEW! 176,071 6 *
Simple Two Speed Contactor DC Motor Controller 211,517 21 *
Stepper Motor Controller 759,766 120 *
Time Delay Relay 563,211 88
Time Delay Relay II jawaharlal@excite.com 253,760 39 *
Touch Switch 296,398 51 *
Video Activated Relay 127,258 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 187,894 10 *
Water Detector With Sump/Bilge Pump Controller 158,782 18 *
Wire Loop Alarm Alex Meaden 211,381 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 325,988 25 *
12VDC To 120VAC Inverter 1,549,733 691
6V to 12V Converter 536,531 121
Automatic 12V Lead Acid Battery Charger 946,501 248
Automatic Load Sensing Power Switch 173,672 16 *
Car Battery Charger 891,758 159 *
Dual Polarity Power Supply 378,663 84 *
Fixed Voltage Power Supply 318,273 52 *
High Current Power Supply 348,336 66 *
High Voltage High Current Power Supply 270,877 35 *
LASER Power Supply 303,668 28
Portable CD Player Adapter For Car 218,343 12 *
Power Supply 747,621 259 *
Solid State Tesla Coil NEW! 153,914 4
Solid State Tesla Coil/High Voltage Generator 453,916 51
Transformerless Power Supply 470,711 117 *
Voltage Inverter 349,569 51 *
Voltage Inverter II 210,256 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 592,863 182
3 Watt FM Transmitter Rae XL Tkacik 345,193 83 *
50 Watt Amplifier 516,718 74
8 Note Tune Player 146,611 12 *
8 Watt Audio Amp 382,389 67 *
Aircraft Radio Communications Receiver 287,667 50 *
Crystal Radio 166,356 53 *
Digital Volume Control 346,600 47 *
Electronic Stethoscope 329,564 142 *
FET Audio Mixer 351,190 41
FM Transmitter 1,023,114 420
Guitar Fuzz Effect 255,470 54 *
Microphone Mixer Anatoly I. Shikhatov 257,580 26 *
Mono To Stereo Synthesizer oRbEq 141,141 18 *
One Tube Regenerative Radio NEW! 155,390 4 *
Op Amp Radio 398,847 80 *
Single Chip AM Radio NEW! 106,181 4 *
Single Chip FM Radio NEW! 180,356 1 *
Sound Level Meter 349,342 51 *
Stereo Tube Amplifier Weslee Kinsler 275,435 15 *
Tone Control 317,298 31
Transistor Organ 207,232 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,057 27 *
FM Telephone Bug 240,615 57
Phone Busy Indicator 219,750 24 *
Remote Telephone Ringer 123,508 3 *
Ringing Phone Light Flasher 225,837 35 *
Simple Phone Tap Derek Tombrello 389,704 98 *
Telephone Hold Button 134,720 10
Telephone Recorder 222,458 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.