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
Wednesday, March 04, 2026		 Computerize Your Room/Home30
12VDC To 120VAC Inverter18
Yesterday
Tuesday, March 03, 2026		 Computerize Your Room/Home360
12VDC To 120VAC Inverter41
Of All Time 12VDC To 120VAC Inverter1,560,962
FM Transmitter1,032,017

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,262 61 *
Car Alarm Arming Horn Beep Canceller bob 144,920 6 *
Wireless Auto Tachometer 353,673 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 167,957 29 *
Parallel (Printer) Port Interface 299,421 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 459,594 63 *
3 Channel Spectrum Analyzer 233,634 20
40W Fluorescent Lamp Inverter Bart Milnes 340,119 60 *
Adjustable Strobe Light 320,866 36
Black Light 295,591 29
Colour (Sound) Organ 302,923 36
Electronic Dice NEW! 199,432 10 *
Fantastic Atom Expander 211,789 25
Flash Slave Trigger 231,956 18 *
Infa-Red Remote Control 650,597 216 *
IR Remote Extender NEW! 142,940 3 *
IR Remote Jammer Carl 277,770 110 *
IR Remote Switch NEW! 167,236 9 *
LASER Transmitter/Receiver 429,977 92
LED Chaser 459,605 83 *
LED Metronome NEW! 108,977 3 *
LED Thermometer 215,918 22 *
Light/Dark Detector 315,419 90 *
Simple Colour Organ 146,315 11 *
Strobe Light 285,293 27 *
TRIAC Light Dimmer 566,126 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,388 122 *
Electromagnetic Levitator NEW! 153,706 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 938,958 214 *
AC Motor Speed Controller 407,068 29 *
Air Flow Detector 261,657 54 *
Digital Keypad Combination Lock 211,403 20
Low Voltage Alarm 239,561 58 *
Pine Racecar Victory Judge 111,148 1 *
Pulse Width Modulation DC Motor Control 668,359 94
Rain Detector 315,393 112 *
Simple Lie Detector 577,701 323
Simple Polarity Tester Dudley LeRoux 175,506 13 *
Simple Servo Controller 232,320 22 *
Simple Touch Switch NEW! 180,487 6 *
Simple Two Speed Contactor DC Motor Controller 215,715 21 *
Stepper Motor Controller 767,247 120 *
Time Delay Relay 567,842 88
Time Delay Relay II jawaharlal@excite.com 258,033 39 *
Touch Switch 300,670 51 *
Video Activated Relay 130,737 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 192,821 10 *
Water Detector With Sump/Bilge Pump Controller 162,801 18 *
Wire Loop Alarm Alex Meaden 215,009 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 333,567 25 *
12VDC To 120VAC Inverter 1,560,962 691
6V to 12V Converter 541,996 121
Automatic 12V Lead Acid Battery Charger 952,435 248
Automatic Load Sensing Power Switch 177,757 16 *
Car Battery Charger 897,189 159 *
Dual Polarity Power Supply 383,968 84 *
Fixed Voltage Power Supply 322,301 52 *
High Current Power Supply 353,952 66 *
High Voltage High Current Power Supply 275,306 35 *
LASER Power Supply 307,911 28
Portable CD Player Adapter For Car 222,394 12 *
Power Supply 752,568 259 *
Solid State Tesla Coil NEW! 159,336 4
Solid State Tesla Coil/High Voltage Generator 460,038 51
Transformerless Power Supply 475,420 117 *
Voltage Inverter 355,961 51 *
Voltage Inverter II 214,400 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,429 182
3 Watt FM Transmitter Rae XL Tkacik 351,391 83 *
50 Watt Amplifier 521,927 74
8 Note Tune Player 150,193 12 *
8 Watt Audio Amp 388,270 67 *
Aircraft Radio Communications Receiver 292,866 50 *
Crystal Radio 172,000 53 *
Digital Volume Control 351,462 47 *
Electronic Stethoscope 334,410 142 *
FET Audio Mixer 355,392 41
FM Transmitter 1,032,017 420
Guitar Fuzz Effect 260,830 54 *
Microphone Mixer Anatoly I. Shikhatov 261,844 26 *
Mono To Stereo Synthesizer oRbEq 145,555 18 *
One Tube Regenerative Radio NEW! 162,697 4 *
Op Amp Radio 404,037 80 *
Single Chip AM Radio NEW! 110,168 4 *
Single Chip FM Radio NEW! 185,479 1 *
Sound Level Meter 353,846 51 *
Stereo Tube Amplifier Weslee Kinsler 280,659 15 *
Tone Control 322,273 31
Transistor Organ 211,593 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,496 27 *
FM Telephone Bug 243,933 57
Phone Busy Indicator 223,376 24 *
Remote Telephone Ringer 127,014 3 *
Ringing Phone Light Flasher 230,815 35 *
Simple Phone Tap Derek Tombrello 393,544 98 *
Telephone Hold Button 138,012 10
Telephone Recorder 225,891 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.