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 07, 2026		 Automatic 12V Lead Acid Battery Charger35
12VDC To 120VAC Inverter22
Yesterday
Monday, July 06, 2026		 Solid State Tesla Coil/High Voltage Generator118
Transformerless Power Supply78
Of All Time 12VDC To 120VAC Inverter1,565,974
FM Transmitter1,036,430

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,783 61 *
Car Alarm Arming Horn Beep Canceller bob 146,365 6 *
Wireless Auto Tachometer 355,380 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,414 29 *
Parallel (Printer) Port Interface 301,640 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,823 63 *
3 Channel Spectrum Analyzer 235,599 20
40W Fluorescent Lamp Inverter Bart Milnes 341,763 60 *
Adjustable Strobe Light 322,788 36
Black Light 297,877 29
Colour (Sound) Organ 305,045 36
Electronic Dice NEW! 201,317 10 *
Fantastic Atom Expander 213,322 25
Flash Slave Trigger 233,701 18 *
Infa-Red Remote Control 653,006 216 *
IR Remote Extender NEW! 144,610 3 *
IR Remote Jammer Carl 279,994 110 *
IR Remote Switch NEW! 168,900 9 *
LASER Transmitter/Receiver 432,109 92
LED Chaser 462,003 83 *
LED Metronome NEW! 110,786 3 *
LED Thermometer 217,475 22 *
Light/Dark Detector 316,974 90 *
Simple Colour Organ 147,852 11 *
Strobe Light 286,915 27 *
TRIAC Light Dimmer 568,666 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,662 122 *
Electromagnetic Levitator NEW! 155,378 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,884 214 *
AC Motor Speed Controller 409,282 29 *
Air Flow Detector 263,483 54 *
Digital Keypad Combination Lock 213,017 20
Low Voltage Alarm 241,321 58 *
Pine Racecar Victory Judge 112,616 1 *
Pulse Width Modulation DC Motor Control 670,472 94
Rain Detector 317,294 112 *
Simple Lie Detector 579,651 323
Simple Polarity Tester Dudley LeRoux 177,245 13 *
Simple Servo Controller 234,079 22 *
Simple Touch Switch NEW! 182,245 6 *
Simple Two Speed Contactor DC Motor Controller 217,624 21 *
Stepper Motor Controller 770,110 120 *
Time Delay Relay 569,878 88
Time Delay Relay II jawaharlal@excite.com 259,723 39 *
Touch Switch 302,471 51 *
Video Activated Relay 132,235 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,830 10 *
Water Detector With Sump/Bilge Pump Controller 164,548 18 *
Wire Loop Alarm Alex Meaden 216,616 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,271 25 *
12VDC To 120VAC Inverter 1,565,974 691
6V to 12V Converter 544,570 121
Automatic 12V Lead Acid Battery Charger 955,212 248
Automatic Load Sensing Power Switch 179,557 16 *
Car Battery Charger 899,373 159 *
Dual Polarity Power Supply 386,063 84 *
Fixed Voltage Power Supply 323,927 52 *
High Current Power Supply 356,092 66 *
High Voltage High Current Power Supply 277,113 35 *
LASER Power Supply 309,850 28
Portable CD Player Adapter For Car 224,234 12 *
Power Supply 754,925 259 *
Solid State Tesla Coil NEW! 161,568 4
Solid State Tesla Coil/High Voltage Generator 462,967 51
Transformerless Power Supply 477,265 117 *
Voltage Inverter 358,342 51 *
Voltage Inverter II 216,236 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,200 182
3 Watt FM Transmitter Rae XL Tkacik 353,986 83 *
50 Watt Amplifier 523,924 74
8 Note Tune Player 151,739 12 *
8 Watt Audio Amp 390,864 67 *
Aircraft Radio Communications Receiver 295,127 50 *
Crystal Radio 174,249 53 *
Digital Volume Control 353,323 47 *
Electronic Stethoscope 336,962 142 *
FET Audio Mixer 357,259 41
FM Transmitter 1,036,430 420
Guitar Fuzz Effect 263,041 54 *
Microphone Mixer Anatoly I. Shikhatov 263,636 26 *
Mono To Stereo Synthesizer oRbEq 147,546 18 *
One Tube Regenerative Radio NEW! 165,356 4 *
Op Amp Radio 406,274 80 *
Single Chip AM Radio NEW! 111,837 4 *
Single Chip FM Radio NEW! 187,576 1 *
Sound Level Meter 355,815 51 *
Stereo Tube Amplifier Weslee Kinsler 282,569 15 *
Tone Control 324,173 31
Transistor Organ 213,585 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,030 27 *
FM Telephone Bug 245,551 57
Phone Busy Indicator 225,151 24 *
Remote Telephone Ringer 128,516 3 *
Ringing Phone Light Flasher 232,955 35 *
Simple Phone Tap Derek Tombrello 395,149 98 *
Telephone Hold Button 139,547 10
Telephone Recorder 227,445 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.