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, July 25, 2026		 Stepper Motor Controller13
50 Watt Amplifier13
Yesterday
Friday, July 24, 2026		 FM Transmitter32
12VDC To 120VAC Inverter31
Of All Time 12VDC To 120VAC Inverter1,566,807
FM Transmitter1,036,790

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,002 61 *
Car Alarm Arming Horn Beep Canceller bob 146,564 6 *
Wireless Auto Tachometer 355,616 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,618 29 *
Parallel (Printer) Port Interface 301,926 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,126 63 *
3 Channel Spectrum Analyzer 235,872 20
40W Fluorescent Lamp Inverter Bart Milnes 341,964 60 *
Adjustable Strobe Light 323,055 36
Black Light 298,212 29
Colour (Sound) Organ 305,339 36
Electronic Dice NEW! 201,566 10 *
Fantastic Atom Expander 213,542 25
Flash Slave Trigger 234,093 18 *
Infa-Red Remote Control 653,331 216 *
IR Remote Extender NEW! 144,858 3 *
IR Remote Jammer Carl 280,241 110 *
IR Remote Switch NEW! 169,127 9 *
LASER Transmitter/Receiver 432,367 92
LED Chaser 462,302 83 *
LED Metronome NEW! 111,042 3 *
LED Thermometer 217,696 22 *
Light/Dark Detector 317,184 90 *
Simple Colour Organ 148,071 11 *
Strobe Light 287,148 27 *
TRIAC Light Dimmer 569,219 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,983 122 *
Electromagnetic Levitator NEW! 155,602 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,237 214 *
AC Motor Speed Controller 409,590 29 *
Air Flow Detector 263,716 54 *
Digital Keypad Combination Lock 213,258 20
Low Voltage Alarm 241,568 58 *
Pine Racecar Victory Judge 112,828 1 *
Pulse Width Modulation DC Motor Control 670,758 94
Rain Detector 317,561 112 *
Simple Lie Detector 579,921 323
Simple Polarity Tester Dudley LeRoux 177,493 13 *
Simple Servo Controller 234,313 22 *
Simple Touch Switch NEW! 182,517 6 *
Simple Two Speed Contactor DC Motor Controller 217,913 21 *
Stepper Motor Controller 770,425 120 *
Time Delay Relay 570,141 88
Time Delay Relay II jawaharlal@excite.com 259,963 39 *
Touch Switch 302,761 51 *
Video Activated Relay 132,467 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 195,821 10 *
Water Detector With Sump/Bilge Pump Controller 164,768 18 *
Wire Loop Alarm Alex Meaden 216,845 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,675 25 *
12VDC To 120VAC Inverter 1,566,807 691
6V to 12V Converter 544,868 121
Automatic 12V Lead Acid Battery Charger 955,657 248
Automatic Load Sensing Power Switch 179,784 16 *
Car Battery Charger 899,657 159 *
Dual Polarity Power Supply 386,324 84 *
Fixed Voltage Power Supply 324,144 52 *
High Current Power Supply 356,412 66 *
High Voltage High Current Power Supply 277,420 35 *
LASER Power Supply 310,218 28
Portable CD Player Adapter For Car 224,495 12 *
Power Supply 755,268 259 *
Solid State Tesla Coil NEW! 161,859 4
Solid State Tesla Coil/High Voltage Generator 463,517 51
Transformerless Power Supply 477,505 117 *
Voltage Inverter 358,800 51 *
Voltage Inverter II 216,490 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,442 182
3 Watt FM Transmitter Rae XL Tkacik 354,272 83 *
50 Watt Amplifier 524,195 74
8 Note Tune Player 151,964 12 *
8 Watt Audio Amp 391,180 67 *
Aircraft Radio Communications Receiver 295,427 50 *
Crystal Radio 174,579 53 *
Digital Volume Control 353,599 47 *
Electronic Stethoscope 337,210 142 *
FET Audio Mixer 357,525 41
FM Transmitter 1,036,790 420
Guitar Fuzz Effect 263,416 54 *
Microphone Mixer Anatoly I. Shikhatov 263,876 26 *
Mono To Stereo Synthesizer oRbEq 147,790 18 *
One Tube Regenerative Radio NEW! 165,699 4 *
Op Amp Radio 406,595 80 *
Single Chip AM Radio NEW! 112,287 4 *
Single Chip FM Radio NEW! 187,903 1 *
Sound Level Meter 356,083 51 *
Stereo Tube Amplifier Weslee Kinsler 282,834 15 *
Tone Control 324,446 31
Transistor Organ 213,858 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,270 27 *
FM Telephone Bug 245,782 57
Phone Busy Indicator 225,383 24 *
Remote Telephone Ringer 128,741 3 *
Ringing Phone Light Flasher 233,347 35 *
Simple Phone Tap Derek Tombrello 395,369 98 *
Telephone Hold Button 139,725 10
Telephone Recorder 227,702 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.