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, June 02, 2026		 12VDC To 120VAC Inverter30
Computerize Your Room/Home20
Yesterday
Monday, June 01, 2026		 12VDC To 120VAC Inverter34
High Voltage High Current Power Supply26
Of All Time 12VDC To 120VAC Inverter1,564,557
FM Transmitter1,035,583

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,331 61 *
Car Alarm Arming Horn Beep Canceller bob 145,922 6 *
Wireless Auto Tachometer 354,885 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 168,921 29 *
Parallel (Printer) Port Interface 300,977 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,053 63 *
3 Channel Spectrum Analyzer 235,024 20
40W Fluorescent Lamp Inverter Bart Milnes 341,289 60 *
Adjustable Strobe Light 322,221 36
Black Light 297,146 29
Colour (Sound) Organ 304,454 36
Electronic Dice NEW! 200,758 10 *
Fantastic Atom Expander 212,866 25
Flash Slave Trigger 233,180 18 *
Infa-Red Remote Control 652,142 216 *
IR Remote Extender NEW! 144,124 3 *
IR Remote Jammer Carl 279,180 110 *
IR Remote Switch NEW! 168,390 9 *
LASER Transmitter/Receiver 431,492 92
LED Chaser 461,064 83 *
LED Metronome NEW! 110,249 3 *
LED Thermometer 217,012 22 *
Light/Dark Detector 316,536 90 *
Simple Colour Organ 147,387 11 *
Strobe Light 286,402 27 *
TRIAC Light Dimmer 567,845 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 373,891 122 *
Electromagnetic Levitator NEW! 154,886 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,071 214 *
AC Motor Speed Controller 408,659 29 *
Air Flow Detector 262,908 54 *
Digital Keypad Combination Lock 212,554 20
Low Voltage Alarm 240,738 58 *
Pine Racecar Victory Judge 112,153 1 *
Pulse Width Modulation DC Motor Control 669,836 94
Rain Detector 316,619 112 *
Simple Lie Detector 579,082 323
Simple Polarity Tester Dudley LeRoux 176,755 13 *
Simple Servo Controller 233,545 22 *
Simple Touch Switch NEW! 181,705 6 *
Simple Two Speed Contactor DC Motor Controller 217,016 21 *
Stepper Motor Controller 769,370 120 *
Time Delay Relay 569,287 88
Time Delay Relay II jawaharlal@excite.com 259,247 39 *
Touch Switch 301,883 51 *
Video Activated Relay 131,730 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,221 10 *
Water Detector With Sump/Bilge Pump Controller 163,982 18 *
Wire Loop Alarm Alex Meaden 216,091 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,565 25 *
12VDC To 120VAC Inverter 1,564,557 691
6V to 12V Converter 543,699 121
Automatic 12V Lead Acid Battery Charger 954,434 248
Automatic Load Sensing Power Switch 179,010 16 *
Car Battery Charger 898,807 159 *
Dual Polarity Power Supply 385,485 84 *
Fixed Voltage Power Supply 323,451 52 *
High Current Power Supply 355,495 66 *
High Voltage High Current Power Supply 276,660 35 *
LASER Power Supply 309,216 28
Portable CD Player Adapter For Car 223,551 12 *
Power Supply 754,236 259 *
Solid State Tesla Coil NEW! 161,031 4
Solid State Tesla Coil/High Voltage Generator 462,088 51
Transformerless Power Supply 476,668 117 *
Voltage Inverter 357,707 51 *
Voltage Inverter II 215,686 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,675 182
3 Watt FM Transmitter Rae XL Tkacik 353,013 83 *
50 Watt Amplifier 523,413 74
8 Note Tune Player 151,278 12 *
8 Watt Audio Amp 390,117 67 *
Aircraft Radio Communications Receiver 294,554 50 *
Crystal Radio 173,588 53 *
Digital Volume Control 352,755 47 *
Electronic Stethoscope 336,369 142 *
FET Audio Mixer 356,714 41
FM Transmitter 1,035,583 420
Guitar Fuzz Effect 262,433 54 *
Microphone Mixer Anatoly I. Shikhatov 263,151 26 *
Mono To Stereo Synthesizer oRbEq 146,989 18 *
One Tube Regenerative Radio NEW! 164,654 4 *
Op Amp Radio 405,665 80 *
Single Chip AM Radio NEW! 111,393 4 *
Single Chip FM Radio NEW! 186,944 1 *
Sound Level Meter 355,289 51 *
Stereo Tube Amplifier Weslee Kinsler 282,033 15 *
Tone Control 323,636 31
Transistor Organ 213,033 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,526 27 *
FM Telephone Bug 245,029 57
Phone Busy Indicator 224,595 24 *
Remote Telephone Ringer 128,042 3 *
Ringing Phone Light Flasher 232,319 35 *
Simple Phone Tap Derek Tombrello 394,655 98 *
Telephone Hold Button 139,096 10
Telephone Recorder 226,943 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.