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 05, 2025		 12VDC To 120VAC Inverter38
FM Transmitter18
Yesterday
Friday, July 04, 2025		 12VDC To 120VAC Inverter73
FM Transmitter50
Of All Time 12VDC To 120VAC Inverter1,549,993
FM Transmitter1,023,272

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 232,584 61 *
Car Alarm Arming Horn Beep Canceller bob 141,594 6 *
Wireless Auto Tachometer 349,418 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 164,957 29 *
Parallel (Printer) Port Interface 294,246 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 455,023 63 *
3 Channel Spectrum Analyzer 229,208 20
40W Fluorescent Lamp Inverter Bart Milnes 336,085 60 *
Adjustable Strobe Light 316,447 36
Black Light 290,361 29
Colour (Sound) Organ 297,975 36
Electronic Dice NEW! 195,306 10 *
Fantastic Atom Expander 208,275 25
Flash Slave Trigger 227,741 18 *
Infa-Red Remote Control 645,416 216 *
IR Remote Extender NEW! 138,928 3 *
IR Remote Jammer Carl 273,388 110 *
IR Remote Switch NEW! 163,285 9 *
LASER Transmitter/Receiver 425,206 92
LED Chaser 454,179 83 *
LED Metronome NEW! 105,178 3 *
LED Thermometer 212,473 22 *
Light/Dark Detector 311,715 90 *
Simple Colour Organ 142,760 11 *
Strobe Light 281,631 27 *
TRIAC Light Dimmer 561,170 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 367,293 122 *
Electromagnetic Levitator NEW! 150,095 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 932,226 214 *
AC Motor Speed Controller 401,057 29 *
Air Flow Detector 257,803 54 *
Digital Keypad Combination Lock 207,652 20
Low Voltage Alarm 235,322 58 *
Pine Racecar Victory Judge 107,837 1 *
Pulse Width Modulation DC Motor Control 663,060 94
Rain Detector 311,341 112 *
Simple Lie Detector 572,612 323
Simple Polarity Tester Dudley LeRoux 171,278 13 *
Simple Servo Controller 228,056 22 *
Simple Touch Switch NEW! 176,127 6 *
Simple Two Speed Contactor DC Motor Controller 211,584 21 *
Stepper Motor Controller 759,875 120 *
Time Delay Relay 563,279 88
Time Delay Relay II jawaharlal@excite.com 253,821 39 *
Touch Switch 296,471 51 *
Video Activated Relay 127,308 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 187,954 10 *
Water Detector With Sump/Bilge Pump Controller 158,830 18 *
Wire Loop Alarm Alex Meaden 211,424 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 326,067 25 *
12VDC To 120VAC Inverter 1,549,993 691
6V to 12V Converter 536,605 121
Automatic 12V Lead Acid Battery Charger 946,585 248
Automatic Load Sensing Power Switch 173,730 16 *
Car Battery Charger 891,830 159 *
Dual Polarity Power Supply 378,751 84 *
Fixed Voltage Power Supply 318,345 52 *
High Current Power Supply 348,418 66 *
High Voltage High Current Power Supply 270,942 35 *
LASER Power Supply 303,727 28
Portable CD Player Adapter For Car 218,407 12 *
Power Supply 747,686 259 *
Solid State Tesla Coil NEW! 153,991 4
Solid State Tesla Coil/High Voltage Generator 454,018 51
Transformerless Power Supply 470,782 117 *
Voltage Inverter 349,686 51 *
Voltage Inverter II 210,316 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 592,918 182
3 Watt FM Transmitter Rae XL Tkacik 345,285 83 *
50 Watt Amplifier 516,811 74
8 Note Tune Player 146,663 12 *
8 Watt Audio Amp 382,490 67 *
Aircraft Radio Communications Receiver 287,762 50 *
Crystal Radio 166,439 53 *
Digital Volume Control 346,696 47 *
Electronic Stethoscope 329,623 142 *
FET Audio Mixer 351,254 41
FM Transmitter 1,023,272 420
Guitar Fuzz Effect 255,546 54 *
Microphone Mixer Anatoly I. Shikhatov 257,643 26 *
Mono To Stereo Synthesizer oRbEq 141,215 18 *
One Tube Regenerative Radio NEW! 155,522 4 *
Op Amp Radio 398,922 80 *
Single Chip AM Radio NEW! 106,237 4 *
Single Chip FM Radio NEW! 180,426 1 *
Sound Level Meter 349,435 51 *
Stereo Tube Amplifier Weslee Kinsler 275,495 15 *
Tone Control 317,385 31
Transistor Organ 207,303 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,107 27 *
FM Telephone Bug 240,664 57
Phone Busy Indicator 219,798 24 *
Remote Telephone Ringer 123,553 3 *
Ringing Phone Light Flasher 225,897 35 *
Simple Phone Tap Derek Tombrello 389,772 98 *
Telephone Hold Button 134,778 10
Telephone Recorder 222,515 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.