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, September 15, 2025		 12VDC To 120VAC Inverter17
12VDC To 120VAC Inverter17
Yesterday
Sunday, September 14, 2025		 12VDC To 120VAC Inverter61
LED Chaser42
Of All Time 12VDC To 120VAC Inverter1,553,021
FM Transmitter1,025,667

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 233,607 61 *
Car Alarm Arming Horn Beep Canceller bob 142,431 6 *
Wireless Auto Tachometer 350,498 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 165,770 29 *
Parallel (Printer) Port Interface 295,650 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 456,226 63 *
3 Channel Spectrum Analyzer 230,445 20
40W Fluorescent Lamp Inverter Bart Milnes 337,170 60 *
Adjustable Strobe Light 317,779 36
Black Light 291,709 29
Colour (Sound) Organ 299,429 36
Electronic Dice NEW! 196,396 10 *
Fantastic Atom Expander 209,175 25
Flash Slave Trigger 228,860 18 *
Infa-Red Remote Control 646,975 216 *
IR Remote Extender NEW! 139,983 3 *
IR Remote Jammer Carl 274,621 110 *
IR Remote Switch NEW! 164,344 9 *
LASER Transmitter/Receiver 426,556 92
LED Chaser 455,607 83 *
LED Metronome NEW! 106,191 3 *
LED Thermometer 213,448 22 *
Light/Dark Detector 312,729 90 *
Simple Colour Organ 143,722 11 *
Strobe Light 282,654 27 *
TRIAC Light Dimmer 562,439 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 368,510 122 *
Electromagnetic Levitator NEW! 151,089 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 933,839 214 *
AC Motor Speed Controller 402,790 29 *
Air Flow Detector 258,851 54 *
Digital Keypad Combination Lock 208,641 20
Low Voltage Alarm 236,484 58 *
Pine Racecar Victory Judge 108,681 1 *
Pulse Width Modulation DC Motor Control 664,692 94
Rain Detector 312,377 112 *
Simple Lie Detector 573,975 323
Simple Polarity Tester Dudley LeRoux 172,297 13 *
Simple Servo Controller 229,246 22 *
Simple Touch Switch NEW! 177,321 6 *
Simple Two Speed Contactor DC Motor Controller 212,701 21 *
Stepper Motor Controller 762,118 120 *
Time Delay Relay 564,560 88
Time Delay Relay II jawaharlal@excite.com 254,900 39 *
Touch Switch 297,669 51 *
Video Activated Relay 128,242 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 189,137 10 *
Water Detector With Sump/Bilge Pump Controller 159,756 18 *
Wire Loop Alarm Alex Meaden 212,427 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 327,946 25 *
12VDC To 120VAC Inverter 1,553,021 691
6V to 12V Converter 538,104 121
Automatic 12V Lead Acid Battery Charger 948,068 248
Automatic Load Sensing Power Switch 174,822 16 *
Car Battery Charger 893,317 159 *
Dual Polarity Power Supply 380,107 84 *
Fixed Voltage Power Supply 319,496 52 *
High Current Power Supply 350,025 66 *
High Voltage High Current Power Supply 272,096 35 *
LASER Power Supply 304,923 28
Portable CD Player Adapter For Car 219,434 12 *
Power Supply 749,014 259 *
Solid State Tesla Coil NEW! 155,376 4
Solid State Tesla Coil/High Voltage Generator 455,664 51
Transformerless Power Supply 471,967 117 *
Voltage Inverter 351,611 51 *
Voltage Inverter II 211,354 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 594,185 182
3 Watt FM Transmitter Rae XL Tkacik 347,324 83 *
50 Watt Amplifier 518,304 74
8 Note Tune Player 147,521 12 *
8 Watt Audio Amp 384,198 67 *
Aircraft Radio Communications Receiver 289,217 50 *
Crystal Radio 167,909 53 *
Digital Volume Control 347,943 47 *
Electronic Stethoscope 330,961 142 *
FET Audio Mixer 352,418 41
FM Transmitter 1,025,667 420
Guitar Fuzz Effect 256,883 54 *
Microphone Mixer Anatoly I. Shikhatov 258,767 26 *
Mono To Stereo Synthesizer oRbEq 142,338 18 *
One Tube Regenerative Radio NEW! 157,692 4 *
Op Amp Radio 400,372 80 *
Single Chip AM Radio NEW! 107,229 4 *
Single Chip FM Radio NEW! 181,755 1 *
Sound Level Meter 350,577 51 *
Stereo Tube Amplifier Weslee Kinsler 276,777 15 *
Tone Control 318,648 31
Transistor Organ 208,377 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,019 27 *
FM Telephone Bug 241,608 57
Phone Busy Indicator 220,770 24 *
Remote Telephone Ringer 124,448 3 *
Ringing Phone Light Flasher 227,308 35 *
Simple Phone Tap Derek Tombrello 390,854 98 *
Telephone Hold Button 135,736 10
Telephone Recorder 223,499 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.