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, June 13, 2026		 Video Stabilizer/MacroVision Removal4
Voltage Inverter II4
Yesterday
Friday, June 12, 2026		 Solid State Tesla Coil7
Electronic Dice6
Of All Time 12VDC To 120VAC Inverter1,564,857
FM Transmitter1,035,813

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,424 61 *
Car Alarm Arming Horn Beep Canceller bob 146,023 6 *
Wireless Auto Tachometer 354,995 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,018 29 *
Parallel (Printer) Port Interface 301,130 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,235 63 *
3 Channel Spectrum Analyzer 235,158 20
40W Fluorescent Lamp Inverter Bart Milnes 341,416 60 *
Adjustable Strobe Light 322,346 36
Black Light 297,328 29
Colour (Sound) Organ 304,595 36
Electronic Dice NEW! 200,908 10 *
Fantastic Atom Expander 212,977 25
Flash Slave Trigger 233,286 18 *
Infa-Red Remote Control 652,280 216 *
IR Remote Extender NEW! 144,241 3 *
IR Remote Jammer Carl 279,314 110 *
IR Remote Switch NEW! 168,510 9 *
LASER Transmitter/Receiver 431,641 92
LED Chaser 461,185 83 *
LED Metronome NEW! 110,388 3 *
LED Thermometer 217,125 22 *
Light/Dark Detector 316,641 90 *
Simple Colour Organ 147,486 11 *
Strobe Light 286,518 27 *
TRIAC Light Dimmer 568,024 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,066 122 *
Electromagnetic Levitator NEW! 154,995 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,231 214 *
AC Motor Speed Controller 408,824 29 *
Air Flow Detector 263,035 54 *
Digital Keypad Combination Lock 212,659 20
Low Voltage Alarm 240,850 58 *
Pine Racecar Victory Judge 112,241 1 *
Pulse Width Modulation DC Motor Control 669,969 94
Rain Detector 316,746 112 *
Simple Lie Detector 579,205 323
Simple Polarity Tester Dudley LeRoux 176,880 13 *
Simple Servo Controller 233,649 22 *
Simple Touch Switch NEW! 181,824 6 *
Simple Two Speed Contactor DC Motor Controller 217,155 21 *
Stepper Motor Controller 769,534 120 *
Time Delay Relay 569,418 88
Time Delay Relay II jawaharlal@excite.com 259,359 39 *
Touch Switch 302,021 51 *
Video Activated Relay 131,832 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,350 10 *
Water Detector With Sump/Bilge Pump Controller 164,101 18 *
Wire Loop Alarm Alex Meaden 216,220 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,710 25 *
12VDC To 120VAC Inverter 1,564,857 691
6V to 12V Converter 543,853 121
Automatic 12V Lead Acid Battery Charger 954,597 248
Automatic Load Sensing Power Switch 179,118 16 *
Car Battery Charger 898,949 159 *
Dual Polarity Power Supply 385,596 84 *
Fixed Voltage Power Supply 323,551 52 *
High Current Power Supply 355,660 66 *
High Voltage High Current Power Supply 276,770 35 *
LASER Power Supply 309,368 28
Portable CD Player Adapter For Car 223,683 12 *
Power Supply 754,391 259 *
Solid State Tesla Coil NEW! 161,150 4
Solid State Tesla Coil/High Voltage Generator 462,251 51
Transformerless Power Supply 476,800 117 *
Voltage Inverter 357,880 51 *
Voltage Inverter II 215,814 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,791 182
3 Watt FM Transmitter Rae XL Tkacik 353,146 83 *
50 Watt Amplifier 523,519 74
8 Note Tune Player 151,384 12 *
8 Watt Audio Amp 390,251 67 *
Aircraft Radio Communications Receiver 294,687 50 *
Crystal Radio 173,813 53 *
Digital Volume Control 352,887 47 *
Electronic Stethoscope 336,504 142 *
FET Audio Mixer 356,839 41
FM Transmitter 1,035,813 420
Guitar Fuzz Effect 262,555 54 *
Microphone Mixer Anatoly I. Shikhatov 263,261 26 *
Mono To Stereo Synthesizer oRbEq 147,099 18 *
One Tube Regenerative Radio NEW! 164,810 4 *
Op Amp Radio 405,809 80 *
Single Chip AM Radio NEW! 111,485 4 *
Single Chip FM Radio NEW! 187,081 1 *
Sound Level Meter 355,406 51 *
Stereo Tube Amplifier Weslee Kinsler 282,177 15 *
Tone Control 323,770 31
Transistor Organ 213,157 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,659 27 *
FM Telephone Bug 245,165 57
Phone Busy Indicator 224,717 24 *
Remote Telephone Ringer 128,162 3 *
Ringing Phone Light Flasher 232,472 35 *
Simple Phone Tap Derek Tombrello 394,773 98 *
Telephone Hold Button 139,202 10
Telephone Recorder 227,072 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.