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
Saturday, July 04, 2026		 3 Watt FM Transmitter108
12V To 24V DC-DC Converter88
Yesterday
Friday, July 03, 2026		 12VDC To 120VAC Inverter48
Ringing Phone Light Flasher40
Of All Time 12VDC To 120VAC Inverter1,565,763
FM Transmitter1,036,335

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,731 61 *
Car Alarm Arming Horn Beep Canceller bob 146,309 6 *
Wireless Auto Tachometer 355,314 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,359 29 *
Parallel (Printer) Port Interface 301,580 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,735 63 *
3 Channel Spectrum Analyzer 235,535 20
40W Fluorescent Lamp Inverter Bart Milnes 341,705 60 *
Adjustable Strobe Light 322,730 36
Black Light 297,789 29
Colour (Sound) Organ 304,975 36
Electronic Dice NEW! 201,247 10 *
Fantastic Atom Expander 213,263 25
Flash Slave Trigger 233,650 18 *
Infa-Red Remote Control 652,930 216 *
IR Remote Extender NEW! 144,548 3 *
IR Remote Jammer Carl 279,931 110 *
IR Remote Switch NEW! 168,830 9 *
LASER Transmitter/Receiver 432,043 92
LED Chaser 461,945 83 *
LED Metronome NEW! 110,724 3 *
LED Thermometer 217,431 22 *
Light/Dark Detector 316,920 90 *
Simple Colour Organ 147,798 11 *
Strobe Light 286,858 27 *
TRIAC Light Dimmer 568,594 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,570 122 *
Electromagnetic Levitator NEW! 155,321 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,796 214 *
AC Motor Speed Controller 409,215 29 *
Air Flow Detector 263,410 54 *
Digital Keypad Combination Lock 212,959 20
Low Voltage Alarm 241,263 58 *
Pine Racecar Victory Judge 112,561 1 *
Pulse Width Modulation DC Motor Control 670,382 94
Rain Detector 317,224 112 *
Simple Lie Detector 579,572 323
Simple Polarity Tester Dudley LeRoux 177,193 13 *
Simple Servo Controller 234,004 22 *
Simple Touch Switch NEW! 182,170 6 *
Simple Two Speed Contactor DC Motor Controller 217,536 21 *
Stepper Motor Controller 770,027 120 *
Time Delay Relay 569,808 88
Time Delay Relay II jawaharlal@excite.com 259,666 39 *
Touch Switch 302,398 51 *
Video Activated Relay 132,171 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,745 10 *
Water Detector With Sump/Bilge Pump Controller 164,493 18 *
Wire Loop Alarm Alex Meaden 216,546 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,185 25 *
12VDC To 120VAC Inverter 1,565,763 691
6V to 12V Converter 544,499 121
Automatic 12V Lead Acid Battery Charger 955,121 248
Automatic Load Sensing Power Switch 179,499 16 *
Car Battery Charger 899,305 159 *
Dual Polarity Power Supply 386,000 84 *
Fixed Voltage Power Supply 323,864 52 *
High Current Power Supply 356,015 66 *
High Voltage High Current Power Supply 277,057 35 *
LASER Power Supply 309,779 28
Portable CD Player Adapter For Car 224,150 12 *
Power Supply 754,843 259 *
Solid State Tesla Coil NEW! 161,499 4
Solid State Tesla Coil/High Voltage Generator 462,802 51
Transformerless Power Supply 477,148 117 *
Voltage Inverter 358,277 51 *
Voltage Inverter II 216,162 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,144 182
3 Watt FM Transmitter Rae XL Tkacik 353,911 83 *
50 Watt Amplifier 523,860 74
8 Note Tune Player 151,687 12 *
8 Watt Audio Amp 390,791 67 *
Aircraft Radio Communications Receiver 295,061 50 *
Crystal Radio 174,192 53 *
Digital Volume Control 353,257 47 *
Electronic Stethoscope 336,882 142 *
FET Audio Mixer 357,194 41
FM Transmitter 1,036,335 420
Guitar Fuzz Effect 262,941 54 *
Microphone Mixer Anatoly I. Shikhatov 263,589 26 *
Mono To Stereo Synthesizer oRbEq 147,489 18 *
One Tube Regenerative Radio NEW! 165,280 4 *
Op Amp Radio 406,203 80 *
Single Chip AM Radio NEW! 111,769 4 *
Single Chip FM Radio NEW! 187,496 1 *
Sound Level Meter 355,765 51 *
Stereo Tube Amplifier Weslee Kinsler 282,512 15 *
Tone Control 324,120 31
Transistor Organ 213,527 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,976 27 *
FM Telephone Bug 245,492 57
Phone Busy Indicator 225,092 24 *
Remote Telephone Ringer 128,466 3 *
Ringing Phone Light Flasher 232,870 35 *
Simple Phone Tap Derek Tombrello 395,092 98 *
Telephone Hold Button 139,498 10
Telephone Recorder 227,400 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.