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, June 25, 2026		 Infa-Red Remote Control76
12VDC To 120VAC Inverter17
Yesterday
Wednesday, June 24, 2026		 Rain Detector92
12VDC To 120VAC Inverter48
Of All Time 12VDC To 120VAC Inverter1,565,359
FM Transmitter1,036,121

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,595 61 *
Car Alarm Arming Horn Beep Canceller bob 146,180 6 *
Wireless Auto Tachometer 355,156 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,210 29 *
Parallel (Printer) Port Interface 301,367 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,465 63 *
3 Channel Spectrum Analyzer 235,376 20
40W Fluorescent Lamp Inverter Bart Milnes 341,567 60 *
Adjustable Strobe Light 322,546 36
Black Light 297,554 29
Colour (Sound) Organ 304,800 36
Electronic Dice NEW! 201,089 10 *
Fantastic Atom Expander 213,114 25
Flash Slave Trigger 233,468 18 *
Infa-Red Remote Control 652,637 216 *
IR Remote Extender NEW! 144,396 3 *
IR Remote Jammer Carl 279,551 110 *
IR Remote Switch NEW! 168,681 9 *
LASER Transmitter/Receiver 431,855 92
LED Chaser 461,457 83 *
LED Metronome NEW! 110,564 3 *
LED Thermometer 217,293 22 *
Light/Dark Detector 316,766 90 *
Simple Colour Organ 147,637 11 *
Strobe Light 286,681 27 *
TRIAC Light Dimmer 568,393 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,335 122 *
Electromagnetic Levitator NEW! 155,176 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,465 214 *
AC Motor Speed Controller 409,053 29 *
Air Flow Detector 263,226 54 *
Digital Keypad Combination Lock 212,805 20
Low Voltage Alarm 241,037 58 *
Pine Racecar Victory Judge 112,421 1 *
Pulse Width Modulation DC Motor Control 670,205 94
Rain Detector 317,034 112 *
Simple Lie Detector 579,400 323
Simple Polarity Tester Dudley LeRoux 177,045 13 *
Simple Servo Controller 233,822 22 *
Simple Touch Switch NEW! 182,014 6 *
Simple Two Speed Contactor DC Motor Controller 217,359 21 *
Stepper Motor Controller 769,807 120 *
Time Delay Relay 569,634 88
Time Delay Relay II jawaharlal@excite.com 259,506 39 *
Touch Switch 302,205 51 *
Video Activated Relay 132,007 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,545 10 *
Water Detector With Sump/Bilge Pump Controller 164,220 18 *
Wire Loop Alarm Alex Meaden 216,371 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,931 25 *
12VDC To 120VAC Inverter 1,565,359 691
6V to 12V Converter 544,092 121
Automatic 12V Lead Acid Battery Charger 954,818 248
Automatic Load Sensing Power Switch 179,264 16 *
Car Battery Charger 899,150 159 *
Dual Polarity Power Supply 385,794 84 *
Fixed Voltage Power Supply 323,707 52 *
High Current Power Supply 355,827 66 *
High Voltage High Current Power Supply 276,909 35 *
LASER Power Supply 309,570 28
Portable CD Player Adapter For Car 223,866 12 *
Power Supply 754,616 259 *
Solid State Tesla Coil NEW! 161,346 4
Solid State Tesla Coil/High Voltage Generator 462,559 51
Transformerless Power Supply 476,945 117 *
Voltage Inverter 358,086 51 *
Voltage Inverter II 215,988 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,966 182
3 Watt FM Transmitter Rae XL Tkacik 353,629 83 *
50 Watt Amplifier 523,680 74
8 Note Tune Player 151,540 12 *
8 Watt Audio Amp 390,500 67 *
Aircraft Radio Communications Receiver 294,888 50 *
Crystal Radio 173,993 53 *
Digital Volume Control 353,063 47 *
Electronic Stethoscope 336,682 142 *
FET Audio Mixer 357,021 41
FM Transmitter 1,036,121 420
Guitar Fuzz Effect 262,752 54 *
Microphone Mixer Anatoly I. Shikhatov 263,418 26 *
Mono To Stereo Synthesizer oRbEq 147,315 18 *
One Tube Regenerative Radio NEW! 165,073 4 *
Op Amp Radio 405,998 80 *
Single Chip AM Radio NEW! 111,637 4 *
Single Chip FM Radio NEW! 187,300 1 *
Sound Level Meter 355,603 51 *
Stereo Tube Amplifier Weslee Kinsler 282,341 15 *
Tone Control 323,939 31
Transistor Organ 213,359 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,831 27 *
FM Telephone Bug 245,338 57
Phone Busy Indicator 224,913 24 *
Remote Telephone Ringer 128,321 3 *
Ringing Phone Light Flasher 232,668 35 *
Simple Phone Tap Derek Tombrello 394,938 98 *
Telephone Hold Button 139,362 10
Telephone Recorder 227,249 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.