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
Thursday, August 13, 2026		 Stepper Motor Controller24
12VDC To 120VAC Inverter23
Yesterday
Wednesday, August 12, 2026		 12VDC To 120VAC Inverter40
Solid State Tesla Coil/High Voltage Generator29
Of All Time 12VDC To 120VAC Inverter1,567,515
FM Transmitter1,037,215

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,221 61 *
Car Alarm Arming Horn Beep Canceller bob 146,754 6 *
Wireless Auto Tachometer 355,881 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,799 29 *
Parallel (Printer) Port Interface 302,246 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,438 63 *
3 Channel Spectrum Analyzer 236,148 20
40W Fluorescent Lamp Inverter Bart Milnes 342,196 60 *
Adjustable Strobe Light 323,316 36
Black Light 298,514 29
Colour (Sound) Organ 305,640 36
Electronic Dice NEW! 201,812 10 *
Fantastic Atom Expander 213,781 25
Flash Slave Trigger 234,370 18 *
Infa-Red Remote Control 653,645 216 *
IR Remote Extender NEW! 145,107 3 *
IR Remote Jammer Carl 280,499 110 *
IR Remote Switch NEW! 169,341 9 *
LASER Transmitter/Receiver 432,667 92
LED Chaser 462,566 83 *
LED Metronome NEW! 111,286 3 *
LED Thermometer 217,907 22 *
Light/Dark Detector 317,420 90 *
Simple Colour Organ 148,257 11 *
Strobe Light 287,396 27 *
TRIAC Light Dimmer 569,527 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 375,332 122 *
Electromagnetic Levitator NEW! 155,767 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,718 214 *
AC Motor Speed Controller 409,942 29 *
Air Flow Detector 264,001 54 *
Digital Keypad Combination Lock 213,456 20
Low Voltage Alarm 241,816 58 *
Pine Racecar Victory Judge 113,044 1 *
Pulse Width Modulation DC Motor Control 671,027 94
Rain Detector 317,817 112 *
Simple Lie Detector 580,200 323
Simple Polarity Tester Dudley LeRoux 177,721 13 *
Simple Servo Controller 234,598 22 *
Simple Touch Switch NEW! 182,776 6 *
Simple Two Speed Contactor DC Motor Controller 218,160 21 *
Stepper Motor Controller 770,931 120 *
Time Delay Relay 570,500 88
Time Delay Relay II jawaharlal@excite.com 260,268 39 *
Touch Switch 303,035 51 *
Video Activated Relay 132,683 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 196,122 10 *
Water Detector With Sump/Bilge Pump Controller 164,968 18 *
Wire Loop Alarm Alex Meaden 217,113 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 337,067 25 *
12VDC To 120VAC Inverter 1,567,515 691
6V to 12V Converter 545,178 121
Automatic 12V Lead Acid Battery Charger 956,061 248
Automatic Load Sensing Power Switch 180,010 16 *
Car Battery Charger 899,975 159 *
Dual Polarity Power Supply 386,603 84 *
Fixed Voltage Power Supply 324,375 52 *
High Current Power Supply 356,693 66 *
High Voltage High Current Power Supply 277,631 35 *
LASER Power Supply 310,485 28
Portable CD Player Adapter For Car 224,758 12 *
Power Supply 755,588 259 *
Solid State Tesla Coil NEW! 162,137 4
Solid State Tesla Coil/High Voltage Generator 463,932 51
Transformerless Power Supply 477,759 117 *
Voltage Inverter 359,100 51 *
Voltage Inverter II 216,735 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,706 182
3 Watt FM Transmitter Rae XL Tkacik 354,558 83 *
50 Watt Amplifier 524,470 74
8 Note Tune Player 152,151 12 *
8 Watt Audio Amp 391,526 67 *
Aircraft Radio Communications Receiver 295,715 50 *
Crystal Radio 174,940 53 *
Digital Volume Control 353,890 47 *
Electronic Stethoscope 337,473 142 *
FET Audio Mixer 357,833 41
FM Transmitter 1,037,215 420
Guitar Fuzz Effect 263,731 54 *
Microphone Mixer Anatoly I. Shikhatov 264,141 26 *
Mono To Stereo Synthesizer oRbEq 148,046 18 *
One Tube Regenerative Radio NEW! 166,074 4 *
Op Amp Radio 406,919 80 *
Single Chip AM Radio NEW! 112,528 4 *
Single Chip FM Radio NEW! 188,231 1 *
Sound Level Meter 356,378 51 *
Stereo Tube Amplifier Weslee Kinsler 283,070 15 *
Tone Control 324,765 31
Transistor Organ 214,128 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,466 27 *
FM Telephone Bug 246,018 57
Phone Busy Indicator 225,636 24 *
Remote Telephone Ringer 128,962 3 *
Ringing Phone Light Flasher 233,667 35 *
Simple Phone Tap Derek Tombrello 395,594 98 *
Telephone Hold Button 139,918 10
Telephone Recorder 227,942 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.