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, October 05, 2026		 12VDC To 120VAC Inverter21
Voltage Inverter II13
Yesterday
Sunday, October 04, 2026		 12VDC To 120VAC Inverter47
Stepper Motor Controller38
Of All Time 12VDC To 120VAC Inverter1,569,845
FM Transmitter1,038,959

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,045 61 *
Car Alarm Arming Horn Beep Canceller bob 147,511 6 *
Wireless Auto Tachometer 356,797 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,623 29 *
Parallel (Printer) Port Interface 303,543 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,553 63 *
3 Channel Spectrum Analyzer 237,255 20
40W Fluorescent Lamp Inverter Bart Milnes 343,074 60 *
Adjustable Strobe Light 324,482 36
Black Light 299,711 29
Colour (Sound) Organ 306,845 36
Electronic Dice NEW! 202,791 10 *
Fantastic Atom Expander 214,698 25
Flash Slave Trigger 235,513 18 *
Infa-Red Remote Control 655,018 216 *
IR Remote Extender NEW! 146,176 3 *
IR Remote Jammer Carl 281,504 110 *
IR Remote Switch NEW! 170,319 9 *
LASER Transmitter/Receiver 433,642 92
LED Chaser 463,826 83 *
LED Metronome NEW! 112,208 3 *
LED Thermometer 218,765 22 *
Light/Dark Detector 318,379 90 *
Simple Colour Organ 149,280 11 *
Strobe Light 288,419 27 *
TRIAC Light Dimmer 570,694 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,443 122 *
Electromagnetic Levitator NEW! 156,591 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,042 214 *
AC Motor Speed Controller 411,018 29 *
Air Flow Detector 264,902 54 *
Digital Keypad Combination Lock 214,304 20
Low Voltage Alarm 242,747 58 *
Pine Racecar Victory Judge 113,983 1 *
Pulse Width Modulation DC Motor Control 672,296 94
Rain Detector 318,780 112 *
Simple Lie Detector 581,171 323
Simple Polarity Tester Dudley LeRoux 178,678 13 *
Simple Servo Controller 235,669 22 *
Simple Touch Switch NEW! 183,733 6 *
Simple Two Speed Contactor DC Motor Controller 219,116 21 *
Stepper Motor Controller 772,385 120 *
Time Delay Relay 571,711 88
Time Delay Relay II jawaharlal@excite.com 261,158 39 *
Touch Switch 304,063 51 *
Video Activated Relay 133,703 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,314 10 *
Water Detector With Sump/Bilge Pump Controller 165,799 18 *
Wire Loop Alarm Alex Meaden 218,073 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 338,541 25 *
12VDC To 120VAC Inverter 1,569,845 691
6V to 12V Converter 546,366 121
Automatic 12V Lead Acid Battery Charger 957,337 248
Automatic Load Sensing Power Switch 181,019 16 *
Car Battery Charger 901,068 159 *
Dual Polarity Power Supply 387,586 84 *
Fixed Voltage Power Supply 325,058 52 *
High Current Power Supply 357,561 66 *
High Voltage High Current Power Supply 278,260 35 *
LASER Power Supply 311,272 28
Portable CD Player Adapter For Car 225,507 12 *
Power Supply 756,509 259 *
Solid State Tesla Coil NEW! 163,119 4
Solid State Tesla Coil/High Voltage Generator 465,102 51
Transformerless Power Supply 478,476 117 *
Voltage Inverter 360,185 51 *
Voltage Inverter II 217,492 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,421 182
3 Watt FM Transmitter Rae XL Tkacik 355,547 83 *
50 Watt Amplifier 525,344 74
8 Note Tune Player 152,894 12 *
8 Watt Audio Amp 392,468 67 *
Aircraft Radio Communications Receiver 296,643 50 *
Crystal Radio 175,721 53 *
Digital Volume Control 354,755 47 *
Electronic Stethoscope 338,495 142 *
FET Audio Mixer 358,576 41
FM Transmitter 1,038,959 420
Guitar Fuzz Effect 264,595 54 *
Microphone Mixer Anatoly I. Shikhatov 264,932 26 *
Mono To Stereo Synthesizer oRbEq 148,790 18 *
One Tube Regenerative Radio NEW! 167,152 4 *
Op Amp Radio 407,904 80 *
Single Chip AM Radio NEW! 113,298 4 *
Single Chip FM Radio NEW! 189,374 1 *
Sound Level Meter 357,204 51 *
Stereo Tube Amplifier Weslee Kinsler 283,754 15 *
Tone Control 325,633 31
Transistor Organ 215,229 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,132 27 *
FM Telephone Bug 246,714 57
Phone Busy Indicator 226,348 24 *
Remote Telephone Ringer 129,565 3 *
Ringing Phone Light Flasher 234,407 35 *
Simple Phone Tap Derek Tombrello 396,260 98 *
Telephone Hold Button 140,489 10
Telephone Recorder 228,755 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.