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
Friday, July 24, 2026		 7 Segment LED Counter23
FM Transmitter22
Yesterday
Thursday, July 23, 2026		 Video Stabilizer/MacroVision Removal48
12VDC To 120VAC Inverter23
Of All Time 12VDC To 120VAC Inverter1,566,786
FM Transmitter1,036,772

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,995 61 *
Car Alarm Arming Horn Beep Canceller bob 146,555 6 *
Wireless Auto Tachometer 355,609 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,609 29 *
Parallel (Printer) Port Interface 301,920 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,119 63 *
3 Channel Spectrum Analyzer 235,865 20
40W Fluorescent Lamp Inverter Bart Milnes 341,960 60 *
Adjustable Strobe Light 323,042 36
Black Light 298,202 29
Colour (Sound) Organ 305,325 36
Electronic Dice NEW! 201,559 10 *
Fantastic Atom Expander 213,537 25
Flash Slave Trigger 234,085 18 *
Infa-Red Remote Control 653,317 216 *
IR Remote Extender NEW! 144,851 3 *
IR Remote Jammer Carl 280,237 110 *
IR Remote Switch NEW! 169,119 9 *
LASER Transmitter/Receiver 432,359 92
LED Chaser 462,284 83 *
LED Metronome NEW! 111,034 3 *
LED Thermometer 217,688 22 *
Light/Dark Detector 317,182 90 *
Simple Colour Organ 148,062 11 *
Strobe Light 287,140 27 *
TRIAC Light Dimmer 569,210 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,972 122 *
Electromagnetic Levitator NEW! 155,597 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,225 214 *
AC Motor Speed Controller 409,581 29 *
Air Flow Detector 263,712 54 *
Digital Keypad Combination Lock 213,249 20
Low Voltage Alarm 241,559 58 *
Pine Racecar Victory Judge 112,823 1 *
Pulse Width Modulation DC Motor Control 670,750 94
Rain Detector 317,559 112 *
Simple Lie Detector 579,910 323
Simple Polarity Tester Dudley LeRoux 177,482 13 *
Simple Servo Controller 234,306 22 *
Simple Touch Switch NEW! 182,501 6 *
Simple Two Speed Contactor DC Motor Controller 217,903 21 *
Stepper Motor Controller 770,408 120 *
Time Delay Relay 570,134 88
Time Delay Relay II jawaharlal@excite.com 259,958 39 *
Touch Switch 302,752 51 *
Video Activated Relay 132,458 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 195,813 10 *
Water Detector With Sump/Bilge Pump Controller 164,757 18 *
Wire Loop Alarm Alex Meaden 216,837 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,665 25 *
12VDC To 120VAC Inverter 1,566,786 691
6V to 12V Converter 544,859 121
Automatic 12V Lead Acid Battery Charger 955,650 248
Automatic Load Sensing Power Switch 179,780 16 *
Car Battery Charger 899,648 159 *
Dual Polarity Power Supply 386,318 84 *
Fixed Voltage Power Supply 324,139 52 *
High Current Power Supply 356,400 66 *
High Voltage High Current Power Supply 277,416 35 *
LASER Power Supply 310,213 28
Portable CD Player Adapter For Car 224,491 12 *
Power Supply 755,259 259 *
Solid State Tesla Coil NEW! 161,850 4
Solid State Tesla Coil/High Voltage Generator 463,504 51
Transformerless Power Supply 477,501 117 *
Voltage Inverter 358,795 51 *
Voltage Inverter II 216,488 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,437 182
3 Watt FM Transmitter Rae XL Tkacik 354,263 83 *
50 Watt Amplifier 524,177 74
8 Note Tune Player 151,958 12 *
8 Watt Audio Amp 391,170 67 *
Aircraft Radio Communications Receiver 295,417 50 *
Crystal Radio 174,574 53 *
Digital Volume Control 353,587 47 *
Electronic Stethoscope 337,203 142 *
FET Audio Mixer 357,515 41
FM Transmitter 1,036,772 420
Guitar Fuzz Effect 263,405 54 *
Microphone Mixer Anatoly I. Shikhatov 263,871 26 *
Mono To Stereo Synthesizer oRbEq 147,779 18 *
One Tube Regenerative Radio NEW! 165,682 4 *
Op Amp Radio 406,583 80 *
Single Chip AM Radio NEW! 112,281 4 *
Single Chip FM Radio NEW! 187,889 1 *
Sound Level Meter 356,070 51 *
Stereo Tube Amplifier Weslee Kinsler 282,820 15 *
Tone Control 324,433 31
Transistor Organ 213,850 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,265 27 *
FM Telephone Bug 245,778 57
Phone Busy Indicator 225,379 24 *
Remote Telephone Ringer 128,733 3 *
Ringing Phone Light Flasher 233,339 35 *
Simple Phone Tap Derek Tombrello 395,361 98 *
Telephone Hold Button 139,721 10
Telephone Recorder 227,696 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.