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, July 14, 2026		 12V To 24V DC-DC Converter86
12VDC To 120VAC Inverter44
Yesterday
Monday, July 13, 2026		 Single Chip AM Radio177
Flash Slave Trigger158
Of All Time 12VDC To 120VAC Inverter1,566,468
FM Transmitter1,036,590

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,891 61 *
Car Alarm Arming Horn Beep Canceller bob 146,467 6 *
Wireless Auto Tachometer 355,495 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,517 29 *
Parallel (Printer) Port Interface 301,779 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,981 63 *
3 Channel Spectrum Analyzer 235,735 20
40W Fluorescent Lamp Inverter Bart Milnes 341,856 60 *
Adjustable Strobe Light 322,913 36
Black Light 298,055 29
Colour (Sound) Organ 305,181 36
Electronic Dice NEW! 201,433 10 *
Fantastic Atom Expander 213,433 25
Flash Slave Trigger 233,978 18 *
Infa-Red Remote Control 653,152 216 *
IR Remote Extender NEW! 144,732 3 *
IR Remote Jammer Carl 280,117 110 *
IR Remote Switch NEW! 169,016 9 *
LASER Transmitter/Receiver 432,228 92
LED Chaser 462,149 83 *
LED Metronome NEW! 110,912 3 *
LED Thermometer 217,577 22 *
Light/Dark Detector 317,078 90 *
Simple Colour Organ 147,965 11 *
Strobe Light 287,034 27 *
TRIAC Light Dimmer 569,023 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,842 122 *
Electromagnetic Levitator NEW! 155,490 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,040 214 *
AC Motor Speed Controller 409,429 29 *
Air Flow Detector 263,604 54 *
Digital Keypad Combination Lock 213,130 20
Low Voltage Alarm 241,433 58 *
Pine Racecar Victory Judge 112,722 1 *
Pulse Width Modulation DC Motor Control 670,627 94
Rain Detector 317,427 112 *
Simple Lie Detector 579,787 323
Simple Polarity Tester Dudley LeRoux 177,380 13 *
Simple Servo Controller 234,192 22 *
Simple Touch Switch NEW! 182,375 6 *
Simple Two Speed Contactor DC Motor Controller 217,772 21 *
Stepper Motor Controller 770,253 120 *
Time Delay Relay 570,008 88
Time Delay Relay II jawaharlal@excite.com 259,842 39 *
Touch Switch 302,613 51 *
Video Activated Relay 132,356 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 195,081 10 *
Water Detector With Sump/Bilge Pump Controller 164,652 18 *
Wire Loop Alarm Alex Meaden 216,729 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,480 25 *
12VDC To 120VAC Inverter 1,566,468 691
6V to 12V Converter 544,717 121
Automatic 12V Lead Acid Battery Charger 955,493 248
Automatic Load Sensing Power Switch 179,679 16 *
Car Battery Charger 899,509 159 *
Dual Polarity Power Supply 386,195 84 *
Fixed Voltage Power Supply 324,040 52 *
High Current Power Supply 356,259 66 *
High Voltage High Current Power Supply 277,312 35 *
LASER Power Supply 310,098 28
Portable CD Player Adapter For Car 224,359 12 *
Power Supply 755,109 259 *
Solid State Tesla Coil NEW! 161,710 4
Solid State Tesla Coil/High Voltage Generator 463,287 51
Transformerless Power Supply 477,403 117 *
Voltage Inverter 358,663 51 *
Voltage Inverter II 216,377 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,324 182
3 Watt FM Transmitter Rae XL Tkacik 354,131 83 *
50 Watt Amplifier 524,050 74
8 Note Tune Player 151,848 12 *
8 Watt Audio Amp 391,040 67 *
Aircraft Radio Communications Receiver 295,270 50 *
Crystal Radio 174,457 53 *
Digital Volume Control 353,454 47 *
Electronic Stethoscope 337,078 142 *
FET Audio Mixer 357,399 41
FM Transmitter 1,036,590 420
Guitar Fuzz Effect 263,293 54 *
Microphone Mixer Anatoly I. Shikhatov 263,754 26 *
Mono To Stereo Synthesizer oRbEq 147,657 18 *
One Tube Regenerative Radio NEW! 165,507 4 *
Op Amp Radio 406,450 80 *
Single Chip AM Radio NEW! 112,155 4 *
Single Chip FM Radio NEW! 187,725 1 *
Sound Level Meter 355,942 51 *
Stereo Tube Amplifier Weslee Kinsler 282,689 15 *
Tone Control 324,291 31
Transistor Organ 213,719 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,158 27 *
FM Telephone Bug 245,676 57
Phone Busy Indicator 225,278 24 *
Remote Telephone Ringer 128,638 3 *
Ringing Phone Light Flasher 233,217 35 *
Simple Phone Tap Derek Tombrello 395,261 98 *
Telephone Hold Button 139,643 10
Telephone Recorder 227,565 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.