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
Wednesday, June 17, 2026		 12VDC To 120VAC Inverter14
One Tube Regenerative Radio9
Yesterday
Tuesday, June 16, 2026		 12VDC To 120VAC Inverter45
Solid State Tesla Coil37
Of All Time 12VDC To 120VAC Inverter1,565,024
FM Transmitter1,035,903

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,493 61 *
Car Alarm Arming Horn Beep Canceller bob 146,081 6 *
Wireless Auto Tachometer 355,043 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,098 29 *
Parallel (Printer) Port Interface 301,212 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,310 63 *
3 Channel Spectrum Analyzer 235,228 20
40W Fluorescent Lamp Inverter Bart Milnes 341,461 60 *
Adjustable Strobe Light 322,423 36
Black Light 297,415 29
Colour (Sound) Organ 304,671 36
Electronic Dice NEW! 200,970 10 *
Fantastic Atom Expander 213,017 25
Flash Slave Trigger 233,345 18 *
Infa-Red Remote Control 652,345 216 *
IR Remote Extender NEW! 144,286 3 *
IR Remote Jammer Carl 279,375 110 *
IR Remote Switch NEW! 168,571 9 *
LASER Transmitter/Receiver 431,718 92
LED Chaser 461,261 83 *
LED Metronome NEW! 110,448 3 *
LED Thermometer 217,199 22 *
Light/Dark Detector 316,683 90 *
Simple Colour Organ 147,536 11 *
Strobe Light 286,567 27 *
TRIAC Light Dimmer 568,119 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,146 122 *
Electromagnetic Levitator NEW! 155,057 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,306 214 *
AC Motor Speed Controller 408,884 29 *
Air Flow Detector 263,091 54 *
Digital Keypad Combination Lock 212,704 20
Low Voltage Alarm 240,920 58 *
Pine Racecar Victory Judge 112,300 1 *
Pulse Width Modulation DC Motor Control 670,042 94
Rain Detector 316,826 112 *
Simple Lie Detector 579,273 323
Simple Polarity Tester Dudley LeRoux 176,933 13 *
Simple Servo Controller 233,697 22 *
Simple Touch Switch NEW! 181,882 6 *
Simple Two Speed Contactor DC Motor Controller 217,217 21 *
Stepper Motor Controller 769,616 120 *
Time Delay Relay 569,492 88
Time Delay Relay II jawaharlal@excite.com 259,417 39 *
Touch Switch 302,078 51 *
Video Activated Relay 131,890 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,438 10 *
Water Detector With Sump/Bilge Pump Controller 164,135 18 *
Wire Loop Alarm Alex Meaden 216,270 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,797 25 *
12VDC To 120VAC Inverter 1,565,024 691
6V to 12V Converter 543,906 121
Automatic 12V Lead Acid Battery Charger 954,682 248
Automatic Load Sensing Power Switch 179,175 16 *
Car Battery Charger 899,011 159 *
Dual Polarity Power Supply 385,649 84 *
Fixed Voltage Power Supply 323,606 52 *
High Current Power Supply 355,713 66 *
High Voltage High Current Power Supply 276,821 35 *
LASER Power Supply 309,435 28
Portable CD Player Adapter For Car 223,743 12 *
Power Supply 754,479 259 *
Solid State Tesla Coil NEW! 161,234 4
Solid State Tesla Coil/High Voltage Generator 462,346 51
Transformerless Power Supply 476,847 117 *
Voltage Inverter 357,951 51 *
Voltage Inverter II 215,877 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,858 182
3 Watt FM Transmitter Rae XL Tkacik 353,206 83 *
50 Watt Amplifier 523,566 74
8 Note Tune Player 151,437 12 *
8 Watt Audio Amp 390,334 67 *
Aircraft Radio Communications Receiver 294,757 50 *
Crystal Radio 173,876 53 *
Digital Volume Control 352,944 47 *
Electronic Stethoscope 336,563 142 *
FET Audio Mixer 356,912 41
FM Transmitter 1,035,903 420
Guitar Fuzz Effect 262,635 54 *
Microphone Mixer Anatoly I. Shikhatov 263,307 26 *
Mono To Stereo Synthesizer oRbEq 147,175 18 *
One Tube Regenerative Radio NEW! 164,900 4 *
Op Amp Radio 405,869 80 *
Single Chip AM Radio NEW! 111,540 4 *
Single Chip FM Radio NEW! 187,166 1 *
Sound Level Meter 355,459 51 *
Stereo Tube Amplifier Weslee Kinsler 282,238 15 *
Tone Control 323,835 31
Transistor Organ 213,217 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,712 27 *
FM Telephone Bug 245,217 57
Phone Busy Indicator 224,769 24 *
Remote Telephone Ringer 128,217 3 *
Ringing Phone Light Flasher 232,534 35 *
Simple Phone Tap Derek Tombrello 394,837 98 *
Telephone Hold Button 139,261 10
Telephone Recorder 227,121 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.