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, November 08, 2025		 12VDC To 120VAC Inverter35
Guitar Fuzz Effect28
Yesterday
Friday, November 07, 2025		 12VDC To 120VAC Inverter49
Video Stabilizer/MacroVision Removal45
Of All Time 12VDC To 120VAC Inverter1,555,763
FM Transmitter1,027,959

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 234,641 61 *
Car Alarm Arming Horn Beep Canceller bob 143,397 6 *
Wireless Auto Tachometer 351,735 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 166,652 29 *
Parallel (Printer) Port Interface 297,229 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 457,584 63 *
3 Channel Spectrum Analyzer 231,692 20
40W Fluorescent Lamp Inverter Bart Milnes 338,225 60 *
Adjustable Strobe Light 318,996 36
Black Light 293,286 29
Colour (Sound) Organ 300,738 36
Electronic Dice NEW! 197,650 10 *
Fantastic Atom Expander 210,175 25
Flash Slave Trigger 229,993 18 *
Infa-Red Remote Control 648,417 216 *
IR Remote Extender NEW! 141,118 3 *
IR Remote Jammer Carl 275,874 110 *
IR Remote Switch NEW! 165,438 9 *
LASER Transmitter/Receiver 427,849 92
LED Chaser 457,198 83 *
LED Metronome NEW! 107,294 3 *
LED Thermometer 214,439 22 *
Light/Dark Detector 313,813 90 *
Simple Colour Organ 144,776 11 *
Strobe Light 283,693 27 *
TRIAC Light Dimmer 563,815 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 369,924 122 *
Electromagnetic Levitator NEW! 152,093 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 935,567 214 *
AC Motor Speed Controller 404,518 29 *
Air Flow Detector 259,856 54 *
Digital Keypad Combination Lock 209,755 20
Low Voltage Alarm 237,650 58 *
Pine Racecar Victory Judge 109,692 1 *
Pulse Width Modulation DC Motor Control 666,072 94
Rain Detector 313,529 112 *
Simple Lie Detector 575,500 323
Simple Polarity Tester Dudley LeRoux 173,559 13 *
Simple Servo Controller 230,433 22 *
Simple Touch Switch NEW! 178,475 6 *
Simple Two Speed Contactor DC Motor Controller 213,906 21 *
Stepper Motor Controller 764,116 120 *
Time Delay Relay 565,815 88
Time Delay Relay II jawaharlal@excite.com 256,130 39 *
Touch Switch 298,802 51 *
Video Activated Relay 129,261 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 190,460 10 *
Water Detector With Sump/Bilge Pump Controller 160,856 18 *
Wire Loop Alarm Alex Meaden 213,467 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 330,246 25 *
12VDC To 120VAC Inverter 1,555,763 691
6V to 12V Converter 539,515 121
Automatic 12V Lead Acid Battery Charger 949,552 248
Automatic Load Sensing Power Switch 175,940 16 *
Car Battery Charger 894,816 159 *
Dual Polarity Power Supply 381,537 84 *
Fixed Voltage Power Supply 320,551 52 *
High Current Power Supply 351,520 66 *
High Voltage High Current Power Supply 273,294 35 *
LASER Power Supply 306,073 28
Portable CD Player Adapter For Car 220,511 12 *
Power Supply 750,321 259 *
Solid State Tesla Coil NEW! 156,770 4
Solid State Tesla Coil/High Voltage Generator 457,228 51
Transformerless Power Supply 473,298 117 *
Voltage Inverter 353,314 51 *
Voltage Inverter II 212,508 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 595,363 182
3 Watt FM Transmitter Rae XL Tkacik 348,862 83 *
50 Watt Amplifier 519,678 74
8 Note Tune Player 148,513 12 *
8 Watt Audio Amp 385,817 67 *
Aircraft Radio Communications Receiver 290,542 50 *
Crystal Radio 169,397 53 *
Digital Volume Control 349,227 47 *
Electronic Stethoscope 332,333 142 *
FET Audio Mixer 353,548 41
FM Transmitter 1,027,959 420
Guitar Fuzz Effect 258,406 54 *
Microphone Mixer Anatoly I. Shikhatov 259,966 26 *
Mono To Stereo Synthesizer oRbEq 143,561 18 *
One Tube Regenerative Radio NEW! 159,630 4 *
Op Amp Radio 401,775 80 *
Single Chip AM Radio NEW! 108,295 4 *
Single Chip FM Radio NEW! 183,189 1 *
Sound Level Meter 351,827 51 *
Stereo Tube Amplifier Weslee Kinsler 278,240 15 *
Tone Control 320,023 31
Transistor Organ 209,613 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,970 27 *
FM Telephone Bug 242,465 57
Phone Busy Indicator 221,711 24 *
Remote Telephone Ringer 125,254 3 *
Ringing Phone Light Flasher 228,540 35 *
Simple Phone Tap Derek Tombrello 391,743 98 *
Telephone Hold Button 136,516 10
Telephone Recorder 224,331 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.