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, June 01, 2026		 12VDC To 120VAC Inverter30
High Voltage High Current Power Supply22
Yesterday
Sunday, May 31, 2026		 12VDC To 120VAC Inverter31
Aircraft Radio Communications Receiver27
Of All Time 12VDC To 120VAC Inverter1,564,523
FM Transmitter1,035,569

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,317 61 *
Car Alarm Arming Horn Beep Canceller bob 145,912 6 *
Wireless Auto Tachometer 354,868 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 168,912 29 *
Parallel (Printer) Port Interface 300,964 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,040 63 *
3 Channel Spectrum Analyzer 235,008 20
40W Fluorescent Lamp Inverter Bart Milnes 341,279 60 *
Adjustable Strobe Light 322,203 36
Black Light 297,133 29
Colour (Sound) Organ 304,440 36
Electronic Dice NEW! 200,748 10 *
Fantastic Atom Expander 212,858 25
Flash Slave Trigger 233,166 18 *
Infa-Red Remote Control 652,129 216 *
IR Remote Extender NEW! 144,114 3 *
IR Remote Jammer Carl 279,167 110 *
IR Remote Switch NEW! 168,379 9 *
LASER Transmitter/Receiver 431,479 92
LED Chaser 461,054 83 *
LED Metronome NEW! 110,237 3 *
LED Thermometer 217,003 22 *
Light/Dark Detector 316,525 90 *
Simple Colour Organ 147,378 11 *
Strobe Light 286,389 27 *
TRIAC Light Dimmer 567,837 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 373,870 122 *
Electromagnetic Levitator NEW! 154,878 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,059 214 *
AC Motor Speed Controller 408,641 29 *
Air Flow Detector 262,897 54 *
Digital Keypad Combination Lock 212,540 20
Low Voltage Alarm 240,722 58 *
Pine Racecar Victory Judge 112,143 1 *
Pulse Width Modulation DC Motor Control 669,820 94
Rain Detector 316,605 112 *
Simple Lie Detector 579,070 323
Simple Polarity Tester Dudley LeRoux 176,745 13 *
Simple Servo Controller 233,535 22 *
Simple Touch Switch NEW! 181,697 6 *
Simple Two Speed Contactor DC Motor Controller 217,006 21 *
Stepper Motor Controller 769,358 120 *
Time Delay Relay 569,269 88
Time Delay Relay II jawaharlal@excite.com 259,236 39 *
Touch Switch 301,870 51 *
Video Activated Relay 131,717 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,213 10 *
Water Detector With Sump/Bilge Pump Controller 163,974 18 *
Wire Loop Alarm Alex Meaden 216,081 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,553 25 *
12VDC To 120VAC Inverter 1,564,523 691
6V to 12V Converter 543,680 121
Automatic 12V Lead Acid Battery Charger 954,416 248
Automatic Load Sensing Power Switch 179,002 16 *
Car Battery Charger 898,787 159 *
Dual Polarity Power Supply 385,478 84 *
Fixed Voltage Power Supply 323,444 52 *
High Current Power Supply 355,482 66 *
High Voltage High Current Power Supply 276,650 35 *
LASER Power Supply 309,202 28
Portable CD Player Adapter For Car 223,542 12 *
Power Supply 754,220 259 *
Solid State Tesla Coil NEW! 161,017 4
Solid State Tesla Coil/High Voltage Generator 462,073 51
Transformerless Power Supply 476,658 117 *
Voltage Inverter 357,694 51 *
Voltage Inverter II 215,670 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,665 182
3 Watt FM Transmitter Rae XL Tkacik 353,007 83 *
50 Watt Amplifier 523,407 74
8 Note Tune Player 151,265 12 *
8 Watt Audio Amp 390,105 67 *
Aircraft Radio Communications Receiver 294,544 50 *
Crystal Radio 173,573 53 *
Digital Volume Control 352,743 47 *
Electronic Stethoscope 336,359 142 *
FET Audio Mixer 356,702 41
FM Transmitter 1,035,569 420
Guitar Fuzz Effect 262,419 54 *
Microphone Mixer Anatoly I. Shikhatov 263,144 26 *
Mono To Stereo Synthesizer oRbEq 146,977 18 *
One Tube Regenerative Radio NEW! 164,639 4 *
Op Amp Radio 405,652 80 *
Single Chip AM Radio NEW! 111,385 4 *
Single Chip FM Radio NEW! 186,931 1 *
Sound Level Meter 355,282 51 *
Stereo Tube Amplifier Weslee Kinsler 282,020 15 *
Tone Control 323,625 31
Transistor Organ 213,014 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,516 27 *
FM Telephone Bug 245,018 57
Phone Busy Indicator 224,582 24 *
Remote Telephone Ringer 128,031 3 *
Ringing Phone Light Flasher 232,304 35 *
Simple Phone Tap Derek Tombrello 394,647 98 *
Telephone Hold Button 139,082 10
Telephone Recorder 226,928 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.