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, March 25, 2025		 12VDC To 120VAC Inverter32
12VDC To 120VAC Inverter32
Yesterday
Monday, March 24, 2025		 FM Transmitter29
12VDC To 120VAC Inverter29
Of All Time 12VDC To 120VAC Inverter1,544,204
FM Transmitter1,019,107

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,466 61 *
Car Alarm Arming Horn Beep Canceller bob 139,743 6 *
Wireless Auto Tachometer 347,155 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,120 29 *
Parallel (Printer) Port Interface 291,727 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,644 63 *
3 Channel Spectrum Analyzer 226,731 20
40W Fluorescent Lamp Inverter Bart Milnes 333,979 60 *
Adjustable Strobe Light 313,808 36
Black Light 287,159 29
Colour (Sound) Organ 295,553 36
Electronic Dice NEW! 193,068 10 *
Fantastic Atom Expander 206,387 25
Flash Slave Trigger 225,508 18 *
Infa-Red Remote Control 642,286 216 *
IR Remote Extender NEW! 136,800 3 *
IR Remote Jammer Carl 271,014 110 *
IR Remote Switch NEW! 161,116 9 *
LASER Transmitter/Receiver 422,464 92
LED Chaser 451,548 83 *
LED Metronome NEW! 103,127 3 *
LED Thermometer 210,541 22 *
Light/Dark Detector 309,755 90 *
Simple Colour Organ 140,791 11 *
Strobe Light 279,582 27 *
TRIAC Light Dimmer 558,702 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,998 122 *
Electromagnetic Levitator NEW! 148,085 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,996 214 *
AC Motor Speed Controller 398,225 29 *
Air Flow Detector 255,815 54 *
Digital Keypad Combination Lock 205,754 20
Low Voltage Alarm 233,223 58 *
Pine Racecar Victory Judge 106,008 1 *
Pulse Width Modulation DC Motor Control 660,527 94
Rain Detector 309,147 112 *
Simple Lie Detector 569,994 323
Simple Polarity Tester Dudley LeRoux 169,299 13 *
Simple Servo Controller 225,747 22 *
Simple Touch Switch NEW! 173,987 6 *
Simple Two Speed Contactor DC Motor Controller 209,314 21 *
Stepper Motor Controller 755,878 120 *
Time Delay Relay 560,788 88
Time Delay Relay II jawaharlal@excite.com 251,723 39 *
Touch Switch 294,205 51 *
Video Activated Relay 125,418 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,828 10 *
Water Detector With Sump/Bilge Pump Controller 156,925 18 *
Wire Loop Alarm Alex Meaden 209,421 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,237 25 *
12VDC To 120VAC Inverter 1,544,204 691
6V to 12V Converter 533,929 121
Automatic 12V Lead Acid Battery Charger 943,730 248
Automatic Load Sensing Power Switch 171,657 16 *
Car Battery Charger 889,104 159 *
Dual Polarity Power Supply 376,240 84 *
Fixed Voltage Power Supply 316,212 52 *
High Current Power Supply 345,814 66 *
High Voltage High Current Power Supply 268,635 35 *
LASER Power Supply 301,434 28
Portable CD Player Adapter For Car 216,348 12 *
Power Supply 745,101 259 *
Solid State Tesla Coil NEW! 151,527 4
Solid State Tesla Coil/High Voltage Generator 451,007 51
Transformerless Power Supply 468,366 117 *
Voltage Inverter 346,541 51 *
Voltage Inverter II 208,128 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,527 182
3 Watt FM Transmitter Rae XL Tkacik 342,391 83 *
50 Watt Amplifier 514,070 74
8 Note Tune Player 144,615 12 *
8 Watt Audio Amp 379,658 67 *
Aircraft Radio Communications Receiver 285,003 50 *
Crystal Radio 163,905 53 *
Digital Volume Control 343,825 47 *
Electronic Stethoscope 327,203 142 *
FET Audio Mixer 348,806 41
FM Transmitter 1,019,107 420
Guitar Fuzz Effect 252,906 54 *
Microphone Mixer Anatoly I. Shikhatov 255,407 26 *
Mono To Stereo Synthesizer oRbEq 138,850 18 *
One Tube Regenerative Radio NEW! 151,839 4 *
Op Amp Radio 396,020 80 *
Single Chip AM Radio NEW! 104,122 4 *
Single Chip FM Radio NEW! 177,942 1 *
Sound Level Meter 346,976 51 *
Stereo Tube Amplifier Weslee Kinsler 273,270 15 *
Tone Control 314,929 31
Transistor Organ 204,845 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,235 27 *
FM Telephone Bug 238,807 57
Phone Busy Indicator 217,751 24 *
Remote Telephone Ringer 121,698 3 *
Ringing Phone Light Flasher 223,561 35 *
Simple Phone Tap Derek Tombrello 387,687 98 *
Telephone Hold Button 132,762 10
Telephone Recorder 220,594 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.