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
Monday, June 15, 2026		 12VDC To 120VAC Inverter9
Electronic Dice8
Yesterday
Sunday, June 14, 2026		 12VDC To 120VAC Inverter35
Parallel (Printer) Port Interface25
Of All Time 12VDC To 120VAC Inverter1,564,936
FM Transmitter1,035,855

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,448 61 *
Car Alarm Arming Horn Beep Canceller bob 146,048 6 *
Wireless Auto Tachometer 355,019 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,037 29 *
Parallel (Printer) Port Interface 301,172 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,265 63 *
3 Channel Spectrum Analyzer 235,189 20
40W Fluorescent Lamp Inverter Bart Milnes 341,438 60 *
Adjustable Strobe Light 322,376 36
Black Light 297,365 29
Colour (Sound) Organ 304,636 36
Electronic Dice NEW! 200,941 10 *
Fantastic Atom Expander 212,995 25
Flash Slave Trigger 233,315 18 *
Infa-Red Remote Control 652,307 216 *
IR Remote Extender NEW! 144,258 3 *
IR Remote Jammer Carl 279,342 110 *
IR Remote Switch NEW! 168,535 9 *
LASER Transmitter/Receiver 431,677 92
LED Chaser 461,221 83 *
LED Metronome NEW! 110,419 3 *
LED Thermometer 217,149 22 *
Light/Dark Detector 316,659 90 *
Simple Colour Organ 147,506 11 *
Strobe Light 286,537 27 *
TRIAC Light Dimmer 568,067 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,099 122 *
Electromagnetic Levitator NEW! 155,027 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,265 214 *
AC Motor Speed Controller 408,844 29 *
Air Flow Detector 263,058 54 *
Digital Keypad Combination Lock 212,675 20
Low Voltage Alarm 240,877 58 *
Pine Racecar Victory Judge 112,260 1 *
Pulse Width Modulation DC Motor Control 670,005 94
Rain Detector 316,775 112 *
Simple Lie Detector 579,228 323
Simple Polarity Tester Dudley LeRoux 176,912 13 *
Simple Servo Controller 233,672 22 *
Simple Touch Switch NEW! 181,848 6 *
Simple Two Speed Contactor DC Motor Controller 217,188 21 *
Stepper Motor Controller 769,576 120 *
Time Delay Relay 569,441 88
Time Delay Relay II jawaharlal@excite.com 259,389 39 *
Touch Switch 302,050 51 *
Video Activated Relay 131,847 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,385 10 *
Water Detector With Sump/Bilge Pump Controller 164,111 18 *
Wire Loop Alarm Alex Meaden 216,249 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,738 25 *
12VDC To 120VAC Inverter 1,564,936 691
6V to 12V Converter 543,873 121
Automatic 12V Lead Acid Battery Charger 954,635 248
Automatic Load Sensing Power Switch 179,134 16 *
Car Battery Charger 898,981 159 *
Dual Polarity Power Supply 385,627 84 *
Fixed Voltage Power Supply 323,580 52 *
High Current Power Supply 355,681 66 *
High Voltage High Current Power Supply 276,792 35 *
LASER Power Supply 309,403 28
Portable CD Player Adapter For Car 223,715 12 *
Power Supply 754,429 259 *
Solid State Tesla Coil NEW! 161,180 4
Solid State Tesla Coil/High Voltage Generator 462,292 51
Transformerless Power Supply 476,817 117 *
Voltage Inverter 357,912 51 *
Voltage Inverter II 215,838 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,823 182
3 Watt FM Transmitter Rae XL Tkacik 353,165 83 *
50 Watt Amplifier 523,537 74
8 Note Tune Player 151,402 12 *
8 Watt Audio Amp 390,293 67 *
Aircraft Radio Communications Receiver 294,716 50 *
Crystal Radio 173,837 53 *
Digital Volume Control 352,914 47 *
Electronic Stethoscope 336,524 142 *
FET Audio Mixer 356,872 41
FM Transmitter 1,035,855 420
Guitar Fuzz Effect 262,586 54 *
Microphone Mixer Anatoly I. Shikhatov 263,283 26 *
Mono To Stereo Synthesizer oRbEq 147,124 18 *
One Tube Regenerative Radio NEW! 164,850 4 *
Op Amp Radio 405,847 80 *
Single Chip AM Radio NEW! 111,511 4 *
Single Chip FM Radio NEW! 187,103 1 *
Sound Level Meter 355,429 51 *
Stereo Tube Amplifier Weslee Kinsler 282,202 15 *
Tone Control 323,806 31
Transistor Organ 213,186 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,686 27 *
FM Telephone Bug 245,194 57
Phone Busy Indicator 224,741 24 *
Remote Telephone Ringer 128,183 3 *
Ringing Phone Light Flasher 232,507 35 *
Simple Phone Tap Derek Tombrello 394,798 98 *
Telephone Hold Button 139,232 10
Telephone Recorder 227,091 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.