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
Tuesday, June 30, 2026		 IR Remote Jammer107
12VDC To 120VAC Inverter21
Yesterday
Monday, June 29, 2026		 IR Remote Jammer113
8 Watt Audio Amp107
Of All Time 12VDC To 120VAC Inverter1,565,573
FM Transmitter1,036,222

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,668 61 *
Car Alarm Arming Horn Beep Canceller bob 146,248 6 *
Wireless Auto Tachometer 355,231 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,283 29 *
Parallel (Printer) Port Interface 301,465 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,635 63 *
3 Channel Spectrum Analyzer 235,445 20
40W Fluorescent Lamp Inverter Bart Milnes 341,635 60 *
Adjustable Strobe Light 322,638 36
Black Light 297,675 29
Colour (Sound) Organ 304,889 36
Electronic Dice NEW! 201,172 10 *
Fantastic Atom Expander 213,189 25
Flash Slave Trigger 233,553 18 *
Infa-Red Remote Control 652,835 216 *
IR Remote Extender NEW! 144,468 3 *
IR Remote Jammer Carl 279,838 110 *
IR Remote Switch NEW! 168,758 9 *
LASER Transmitter/Receiver 431,940 92
LED Chaser 461,866 83 *
LED Metronome NEW! 110,638 3 *
LED Thermometer 217,355 22 *
Light/Dark Detector 316,828 90 *
Simple Colour Organ 147,717 11 *
Strobe Light 286,772 27 *
TRIAC Light Dimmer 568,496 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,454 122 *
Electromagnetic Levitator NEW! 155,245 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,673 214 *
AC Motor Speed Controller 409,126 29 *
Air Flow Detector 263,321 54 *
Digital Keypad Combination Lock 212,882 20
Low Voltage Alarm 241,176 58 *
Pine Racecar Victory Judge 112,495 1 *
Pulse Width Modulation DC Motor Control 670,304 94
Rain Detector 317,137 112 *
Simple Lie Detector 579,488 323
Simple Polarity Tester Dudley LeRoux 177,120 13 *
Simple Servo Controller 233,931 22 *
Simple Touch Switch NEW! 182,097 6 *
Simple Two Speed Contactor DC Motor Controller 217,443 21 *
Stepper Motor Controller 769,925 120 *
Time Delay Relay 569,728 88
Time Delay Relay II jawaharlal@excite.com 259,581 39 *
Touch Switch 302,306 51 *
Video Activated Relay 132,084 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,640 10 *
Water Detector With Sump/Bilge Pump Controller 164,413 18 *
Wire Loop Alarm Alex Meaden 216,440 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,009 25 *
12VDC To 120VAC Inverter 1,565,573 691
6V to 12V Converter 544,206 121
Automatic 12V Lead Acid Battery Charger 955,029 248
Automatic Load Sensing Power Switch 179,416 16 *
Car Battery Charger 899,231 159 *
Dual Polarity Power Supply 385,911 84 *
Fixed Voltage Power Supply 323,782 52 *
High Current Power Supply 355,919 66 *
High Voltage High Current Power Supply 276,983 35 *
LASER Power Supply 309,664 28
Portable CD Player Adapter For Car 223,956 12 *
Power Supply 754,715 259 *
Solid State Tesla Coil NEW! 161,418 4
Solid State Tesla Coil/High Voltage Generator 462,691 51
Transformerless Power Supply 477,066 117 *
Voltage Inverter 358,186 51 *
Voltage Inverter II 216,063 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,053 182
3 Watt FM Transmitter Rae XL Tkacik 353,716 83 *
50 Watt Amplifier 523,762 74
8 Note Tune Player 151,610 12 *
8 Watt Audio Amp 390,691 67 *
Aircraft Radio Communications Receiver 294,959 50 *
Crystal Radio 174,086 53 *
Digital Volume Control 353,151 47 *
Electronic Stethoscope 336,768 142 *
FET Audio Mixer 357,102 41
FM Transmitter 1,036,222 420
Guitar Fuzz Effect 262,848 54 *
Microphone Mixer Anatoly I. Shikhatov 263,499 26 *
Mono To Stereo Synthesizer oRbEq 147,398 18 *
One Tube Regenerative Radio NEW! 165,160 4 *
Op Amp Radio 406,116 80 *
Single Chip AM Radio NEW! 111,707 4 *
Single Chip FM Radio NEW! 187,391 1 *
Sound Level Meter 355,677 51 *
Stereo Tube Amplifier Weslee Kinsler 282,433 15 *
Tone Control 324,014 31
Transistor Organ 213,439 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,889 27 *
FM Telephone Bug 245,413 57
Phone Busy Indicator 225,000 24 *
Remote Telephone Ringer 128,384 3 *
Ringing Phone Light Flasher 232,767 35 *
Simple Phone Tap Derek Tombrello 395,007 98 *
Telephone Hold Button 139,432 10
Telephone Recorder 227,319 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.