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
Sunday, May 18, 2025		 Black Light16
AC Motor Speed Controller15
Yesterday
Saturday, May 17, 2025		 12VDC To 120VAC Inverter37
FM Transmitter32
Of All Time 12VDC To 120VAC Inverter1,546,780
FM Transmitter1,020,697

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,068 61 *
Car Alarm Arming Horn Beep Canceller bob 140,255 6 *
Wireless Auto Tachometer 347,870 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,623 29 *
Parallel (Printer) Port Interface 292,564 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,372 63 *
3 Channel Spectrum Analyzer 227,585 20
40W Fluorescent Lamp Inverter Bart Milnes 334,579 60 *
Adjustable Strobe Light 314,606 36
Black Light 288,170 29
Colour (Sound) Organ 296,275 36
Electronic Dice NEW! 193,764 10 *
Fantastic Atom Expander 206,930 25
Flash Slave Trigger 226,180 18 *
Infa-Red Remote Control 643,151 216 *
IR Remote Extender NEW! 137,454 3 *
IR Remote Jammer Carl 271,829 110 *
IR Remote Switch NEW! 161,744 9 *
LASER Transmitter/Receiver 423,363 92
LED Chaser 452,370 83 *
LED Metronome NEW! 103,754 3 *
LED Thermometer 211,106 22 *
Light/Dark Detector 310,330 90 *
Simple Colour Organ 141,342 11 *
Strobe Light 280,216 27 *
TRIAC Light Dimmer 559,509 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,739 122 *
Electromagnetic Levitator NEW! 148,692 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,224 214 *
AC Motor Speed Controller 399,214 29 *
Air Flow Detector 256,395 54 *
Digital Keypad Combination Lock 206,316 20
Low Voltage Alarm 233,837 58 *
Pine Racecar Victory Judge 106,533 1 *
Pulse Width Modulation DC Motor Control 661,382 94
Rain Detector 309,861 112 *
Simple Lie Detector 570,838 323
Simple Polarity Tester Dudley LeRoux 169,886 13 *
Simple Servo Controller 226,493 22 *
Simple Touch Switch NEW! 174,672 6 *
Simple Two Speed Contactor DC Motor Controller 209,992 21 *
Stepper Motor Controller 757,413 120 *
Time Delay Relay 561,629 88
Time Delay Relay II jawaharlal@excite.com 252,322 39 *
Touch Switch 294,929 51 *
Video Activated Relay 125,941 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,472 10 *
Water Detector With Sump/Bilge Pump Controller 157,472 18 *
Wire Loop Alarm Alex Meaden 210,006 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,304 25 *
12VDC To 120VAC Inverter 1,546,780 691
6V to 12V Converter 534,850 121
Automatic 12V Lead Acid Battery Charger 944,695 248
Automatic Load Sensing Power Switch 172,284 16 *
Car Battery Charger 890,008 159 *
Dual Polarity Power Supply 377,040 84 *
Fixed Voltage Power Supply 316,852 52 *
High Current Power Supply 346,759 66 *
High Voltage High Current Power Supply 269,355 35 *
LASER Power Supply 302,164 28
Portable CD Player Adapter For Car 216,962 12 *
Power Supply 746,066 259 *
Solid State Tesla Coil NEW! 152,339 4
Solid State Tesla Coil/High Voltage Generator 452,049 51
Transformerless Power Supply 469,179 117 *
Voltage Inverter 347,754 51 *
Voltage Inverter II 208,866 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,285 182
3 Watt FM Transmitter Rae XL Tkacik 343,383 83 *
50 Watt Amplifier 514,955 74
8 Note Tune Player 145,216 12 *
8 Watt Audio Amp 380,585 67 *
Aircraft Radio Communications Receiver 285,940 50 *
Crystal Radio 164,739 53 *
Digital Volume Control 344,834 47 *
Electronic Stethoscope 327,982 142 *
FET Audio Mixer 349,656 41
FM Transmitter 1,020,697 420
Guitar Fuzz Effect 253,851 54 *
Microphone Mixer Anatoly I. Shikhatov 256,128 26 *
Mono To Stereo Synthesizer oRbEq 139,567 18 *
One Tube Regenerative Radio NEW! 153,159 4 *
Op Amp Radio 397,017 80 *
Single Chip AM Radio NEW! 104,778 4 *
Single Chip FM Radio NEW! 178,784 1 *
Sound Level Meter 347,794 51 *
Stereo Tube Amplifier Weslee Kinsler 273,959 15 *
Tone Control 315,645 31
Transistor Organ 205,650 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,775 27 *
FM Telephone Bug 239,336 57
Phone Busy Indicator 218,365 24 *
Remote Telephone Ringer 122,227 3 *
Ringing Phone Light Flasher 224,341 35 *
Simple Phone Tap Derek Tombrello 388,343 98 *
Telephone Hold Button 133,322 10
Telephone Recorder 221,185 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.