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, March 05, 2026		 12VDC To 120VAC Inverter35
12V To 24V DC-DC Converter32
Yesterday
Wednesday, March 04, 2026		 12VDC To 120VAC Inverter48
Computerize Your Room/Home37
Of All Time 12VDC To 120VAC Inverter1,561,028
FM Transmitter1,032,050

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,287 61 *
Car Alarm Arming Horn Beep Canceller bob 144,953 6 *
Wireless Auto Tachometer 353,697 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 167,978 29 *
Parallel (Printer) Port Interface 299,454 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 459,634 63 *
3 Channel Spectrum Analyzer 233,660 20
40W Fluorescent Lamp Inverter Bart Milnes 340,149 60 *
Adjustable Strobe Light 320,888 36
Black Light 295,627 29
Colour (Sound) Organ 302,954 36
Electronic Dice NEW! 199,456 10 *
Fantastic Atom Expander 211,810 25
Flash Slave Trigger 231,977 18 *
Infa-Red Remote Control 650,622 216 *
IR Remote Extender NEW! 142,965 3 *
IR Remote Jammer Carl 277,809 110 *
IR Remote Switch NEW! 167,261 9 *
LASER Transmitter/Receiver 430,016 92
LED Chaser 459,639 83 *
LED Metronome NEW! 109,007 3 *
LED Thermometer 215,950 22 *
Light/Dark Detector 315,442 90 *
Simple Colour Organ 146,337 11 *
Strobe Light 285,314 27 *
TRIAC Light Dimmer 566,166 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,413 122 *
Electromagnetic Levitator NEW! 153,734 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 939,002 214 *
AC Motor Speed Controller 407,096 29 *
Air Flow Detector 261,678 54 *
Digital Keypad Combination Lock 211,429 20
Low Voltage Alarm 239,578 58 *
Pine Racecar Victory Judge 111,172 1 *
Pulse Width Modulation DC Motor Control 668,381 94
Rain Detector 315,420 112 *
Simple Lie Detector 577,729 323
Simple Polarity Tester Dudley LeRoux 175,522 13 *
Simple Servo Controller 232,355 22 *
Simple Touch Switch NEW! 180,508 6 *
Simple Two Speed Contactor DC Motor Controller 215,750 21 *
Stepper Motor Controller 767,287 120 *
Time Delay Relay 567,864 88
Time Delay Relay II jawaharlal@excite.com 258,053 39 *
Touch Switch 300,694 51 *
Video Activated Relay 130,763 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 192,859 10 *
Water Detector With Sump/Bilge Pump Controller 162,824 18 *
Wire Loop Alarm Alex Meaden 215,035 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 333,620 25 *
12VDC To 120VAC Inverter 1,561,028 691
6V to 12V Converter 542,025 121
Automatic 12V Lead Acid Battery Charger 952,478 248
Automatic Load Sensing Power Switch 177,788 16 *
Car Battery Charger 897,222 159 *
Dual Polarity Power Supply 384,013 84 *
Fixed Voltage Power Supply 322,332 52 *
High Current Power Supply 353,981 66 *
High Voltage High Current Power Supply 275,336 35 *
LASER Power Supply 307,943 28
Portable CD Player Adapter For Car 222,428 12 *
Power Supply 752,602 259 *
Solid State Tesla Coil NEW! 159,372 4
Solid State Tesla Coil/High Voltage Generator 460,071 51
Transformerless Power Supply 475,452 117 *
Voltage Inverter 355,994 51 *
Voltage Inverter II 214,434 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,452 182
3 Watt FM Transmitter Rae XL Tkacik 351,419 83 *
50 Watt Amplifier 521,963 74
8 Note Tune Player 150,220 12 *
8 Watt Audio Amp 388,307 67 *
Aircraft Radio Communications Receiver 292,910 50 *
Crystal Radio 172,028 53 *
Digital Volume Control 351,488 47 *
Electronic Stethoscope 334,438 142 *
FET Audio Mixer 355,428 41
FM Transmitter 1,032,050 420
Guitar Fuzz Effect 260,859 54 *
Microphone Mixer Anatoly I. Shikhatov 261,878 26 *
Mono To Stereo Synthesizer oRbEq 145,587 18 *
One Tube Regenerative Radio NEW! 162,728 4 *
Op Amp Radio 404,084 80 *
Single Chip AM Radio NEW! 110,192 4 *
Single Chip FM Radio NEW! 185,506 1 *
Sound Level Meter 353,887 51 *
Stereo Tube Amplifier Weslee Kinsler 280,688 15 *
Tone Control 322,301 31
Transistor Organ 211,616 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,517 27 *
FM Telephone Bug 243,956 57
Phone Busy Indicator 223,407 24 *
Remote Telephone Ringer 127,035 3 *
Ringing Phone Light Flasher 230,839 35 *
Simple Phone Tap Derek Tombrello 393,567 98 *
Telephone Hold Button 138,036 10
Telephone Recorder 225,918 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.