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
Monday, July 13, 2026		 Single Chip AM Radio174
Flash Slave Trigger147
Yesterday
Sunday, July 12, 2026		 12VDC To 120VAC Inverter146
Voltage Inverter101
Of All Time 12VDC To 120VAC Inverter1,566,413
FM Transmitter1,036,573

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,871 61 *
Car Alarm Arming Horn Beep Canceller bob 146,457 6 *
Wireless Auto Tachometer 355,479 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,505 29 *
Parallel (Printer) Port Interface 301,761 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,969 63 *
3 Channel Spectrum Analyzer 235,710 20
40W Fluorescent Lamp Inverter Bart Milnes 341,847 60 *
Adjustable Strobe Light 322,890 36
Black Light 298,031 29
Colour (Sound) Organ 305,155 36
Electronic Dice NEW! 201,415 10 *
Fantastic Atom Expander 213,416 25
Flash Slave Trigger 233,954 18 *
Infa-Red Remote Control 653,126 216 *
IR Remote Extender NEW! 144,716 3 *
IR Remote Jammer Carl 280,099 110 *
IR Remote Switch NEW! 168,991 9 *
LASER Transmitter/Receiver 432,209 92
LED Chaser 462,133 83 *
LED Metronome NEW! 110,881 3 *
LED Thermometer 217,567 22 *
Light/Dark Detector 317,060 90 *
Simple Colour Organ 147,943 11 *
Strobe Light 287,017 27 *
TRIAC Light Dimmer 568,951 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,811 122 *
Electromagnetic Levitator NEW! 155,479 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,017 214 *
AC Motor Speed Controller 409,407 29 *
Air Flow Detector 263,586 54 *
Digital Keypad Combination Lock 213,113 20
Low Voltage Alarm 241,414 58 *
Pine Racecar Victory Judge 112,699 1 *
Pulse Width Modulation DC Motor Control 670,596 94
Rain Detector 317,406 112 *
Simple Lie Detector 579,771 323
Simple Polarity Tester Dudley LeRoux 177,350 13 *
Simple Servo Controller 234,170 22 *
Simple Touch Switch NEW! 182,360 6 *
Simple Two Speed Contactor DC Motor Controller 217,749 21 *
Stepper Motor Controller 770,228 120 *
Time Delay Relay 569,989 88
Time Delay Relay II jawaharlal@excite.com 259,819 39 *
Touch Switch 302,583 51 *
Video Activated Relay 132,341 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 195,063 10 *
Water Detector With Sump/Bilge Pump Controller 164,644 18 *
Wire Loop Alarm Alex Meaden 216,711 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,389 25 *
12VDC To 120VAC Inverter 1,566,413 691
6V to 12V Converter 544,702 121
Automatic 12V Lead Acid Battery Charger 955,468 248
Automatic Load Sensing Power Switch 179,662 16 *
Car Battery Charger 899,484 159 *
Dual Polarity Power Supply 386,170 84 *
Fixed Voltage Power Supply 324,029 52 *
High Current Power Supply 356,225 66 *
High Voltage High Current Power Supply 277,299 35 *
LASER Power Supply 310,076 28
Portable CD Player Adapter For Car 224,342 12 *
Power Supply 755,093 259 *
Solid State Tesla Coil NEW! 161,692 4
Solid State Tesla Coil/High Voltage Generator 463,265 51
Transformerless Power Supply 477,385 117 *
Voltage Inverter 358,639 51 *
Voltage Inverter II 216,357 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,292 182
3 Watt FM Transmitter Rae XL Tkacik 354,112 83 *
50 Watt Amplifier 524,029 74
8 Note Tune Player 151,825 12 *
8 Watt Audio Amp 391,019 67 *
Aircraft Radio Communications Receiver 295,243 50 *
Crystal Radio 174,426 53 *
Digital Volume Control 353,438 47 *
Electronic Stethoscope 337,052 142 *
FET Audio Mixer 357,374 41
FM Transmitter 1,036,573 420
Guitar Fuzz Effect 263,263 54 *
Microphone Mixer Anatoly I. Shikhatov 263,740 26 *
Mono To Stereo Synthesizer oRbEq 147,641 18 *
One Tube Regenerative Radio NEW! 165,489 4 *
Op Amp Radio 406,425 80 *
Single Chip AM Radio NEW! 112,120 4 *
Single Chip FM Radio NEW! 187,692 1 *
Sound Level Meter 355,913 51 *
Stereo Tube Amplifier Weslee Kinsler 282,675 15 *
Tone Control 324,272 31
Transistor Organ 213,694 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,135 27 *
FM Telephone Bug 245,655 57
Phone Busy Indicator 225,263 24 *
Remote Telephone Ringer 128,624 3 *
Ringing Phone Light Flasher 233,192 35 *
Simple Phone Tap Derek Tombrello 395,247 98 *
Telephone Hold Button 139,625 10
Telephone Recorder 227,549 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.