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 03, 2026		 Computerize Your Room/Home145
3 Channel Spectrum Analyzer12
Yesterday
Monday, March 02, 2026		 Computerize Your Room/Home115
12V To 24V DC-DC Converter30
Of All Time 12VDC To 120VAC Inverter1,560,908
FM Transmitter1,031,985

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,240 61 *
Car Alarm Arming Horn Beep Canceller bob 144,904 6 *
Wireless Auto Tachometer 353,652 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 167,938 29 *
Parallel (Printer) Port Interface 299,397 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 459,566 63 *
3 Channel Spectrum Analyzer 233,613 20
40W Fluorescent Lamp Inverter Bart Milnes 340,102 60 *
Adjustable Strobe Light 320,841 36
Black Light 295,549 29
Colour (Sound) Organ 302,898 36
Electronic Dice NEW! 199,408 10 *
Fantastic Atom Expander 211,759 25
Flash Slave Trigger 231,925 18 *
Infa-Red Remote Control 650,580 216 *
IR Remote Extender NEW! 142,920 3 *
IR Remote Jammer Carl 277,745 110 *
IR Remote Switch NEW! 167,219 9 *
LASER Transmitter/Receiver 429,948 92
LED Chaser 459,580 83 *
LED Metronome NEW! 108,949 3 *
LED Thermometer 215,902 22 *
Light/Dark Detector 315,393 90 *
Simple Colour Organ 146,296 11 *
Strobe Light 285,269 27 *
TRIAC Light Dimmer 566,101 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,143 122 *
Electromagnetic Levitator NEW! 153,675 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 938,925 214 *
AC Motor Speed Controller 407,045 29 *
Air Flow Detector 261,630 54 *
Digital Keypad Combination Lock 211,386 20
Low Voltage Alarm 239,550 58 *
Pine Racecar Victory Judge 111,137 1 *
Pulse Width Modulation DC Motor Control 668,340 94
Rain Detector 315,372 112 *
Simple Lie Detector 577,680 323
Simple Polarity Tester Dudley LeRoux 175,490 13 *
Simple Servo Controller 232,306 22 *
Simple Touch Switch NEW! 180,475 6 *
Simple Two Speed Contactor DC Motor Controller 215,692 21 *
Stepper Motor Controller 767,221 120 *
Time Delay Relay 567,823 88
Time Delay Relay II jawaharlal@excite.com 258,017 39 *
Touch Switch 300,641 51 *
Video Activated Relay 130,720 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 192,807 10 *
Water Detector With Sump/Bilge Pump Controller 162,779 18 *
Wire Loop Alarm Alex Meaden 214,984 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 333,539 25 *
12VDC To 120VAC Inverter 1,560,908 691
6V to 12V Converter 541,970 121
Automatic 12V Lead Acid Battery Charger 952,401 248
Automatic Load Sensing Power Switch 177,741 16 *
Car Battery Charger 897,163 159 *
Dual Polarity Power Supply 383,950 84 *
Fixed Voltage Power Supply 322,284 52 *
High Current Power Supply 353,933 66 *
High Voltage High Current Power Supply 275,283 35 *
LASER Power Supply 307,888 28
Portable CD Player Adapter For Car 222,370 12 *
Power Supply 752,533 259 *
Solid State Tesla Coil NEW! 159,315 4
Solid State Tesla Coil/High Voltage Generator 460,004 51
Transformerless Power Supply 475,399 117 *
Voltage Inverter 355,943 51 *
Voltage Inverter II 214,385 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,405 182
3 Watt FM Transmitter Rae XL Tkacik 351,364 83 *
50 Watt Amplifier 521,903 74
8 Note Tune Player 150,167 12 *
8 Watt Audio Amp 388,234 67 *
Aircraft Radio Communications Receiver 292,815 50 *
Crystal Radio 171,959 53 *
Digital Volume Control 351,441 47 *
Electronic Stethoscope 334,381 142 *
FET Audio Mixer 355,370 41
FM Transmitter 1,031,985 420
Guitar Fuzz Effect 260,798 54 *
Microphone Mixer Anatoly I. Shikhatov 261,820 26 *
Mono To Stereo Synthesizer oRbEq 145,535 18 *
One Tube Regenerative Radio NEW! 162,677 4 *
Op Amp Radio 404,012 80 *
Single Chip AM Radio NEW! 110,147 4 *
Single Chip FM Radio NEW! 185,456 1 *
Sound Level Meter 353,821 51 *
Stereo Tube Amplifier Weslee Kinsler 280,632 15 *
Tone Control 322,242 31
Transistor Organ 211,558 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,468 27 *
FM Telephone Bug 243,912 57
Phone Busy Indicator 223,361 24 *
Remote Telephone Ringer 126,997 3 *
Ringing Phone Light Flasher 230,785 35 *
Simple Phone Tap Derek Tombrello 393,532 98 *
Telephone Hold Button 138,000 10
Telephone Recorder 225,874 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.