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, October 24, 2026		 12VDC To 120VAC Inverter33
Guitar Fuzz Effect31
Yesterday
Friday, October 23, 2026		 12VDC To 120VAC Inverter49
FM Transmitter47
Of All Time 12VDC To 120VAC Inverter1,570,597
FM Transmitter1,039,501

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,302 61 *
Car Alarm Arming Horn Beep Canceller bob 147,748 6 *
Wireless Auto Tachometer 357,112 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,908 29 *
Parallel (Printer) Port Interface 303,938 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,927 63 *
3 Channel Spectrum Analyzer 237,665 20
40W Fluorescent Lamp Inverter Bart Milnes 343,395 60 *
Adjustable Strobe Light 324,820 36
Black Light 300,161 29
Colour (Sound) Organ 307,258 36
Electronic Dice NEW! 203,164 10 *
Fantastic Atom Expander 215,022 25
Flash Slave Trigger 235,911 18 *
Infa-Red Remote Control 655,405 216 *
IR Remote Extender NEW! 146,532 3 *
IR Remote Jammer Carl 281,835 110 *
IR Remote Switch NEW! 170,686 9 *
LASER Transmitter/Receiver 434,001 92
LED Chaser 464,212 83 *
LED Metronome NEW! 112,518 3 *
LED Thermometer 219,047 22 *
Light/Dark Detector 318,663 90 *
Simple Colour Organ 149,598 11 *
Strobe Light 288,766 27 *
TRIAC Light Dimmer 571,099 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,820 122 *
Electromagnetic Levitator NEW! 156,894 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,568 214 *
AC Motor Speed Controller 411,402 29 *
Air Flow Detector 265,202 54 *
Digital Keypad Combination Lock 214,595 20
Low Voltage Alarm 243,055 58 *
Pine Racecar Victory Judge 114,297 1 *
Pulse Width Modulation DC Motor Control 672,719 94
Rain Detector 319,102 112 *
Simple Lie Detector 581,548 323
Simple Polarity Tester Dudley LeRoux 179,015 13 *
Simple Servo Controller 236,012 22 *
Simple Touch Switch NEW! 184,059 6 *
Simple Two Speed Contactor DC Motor Controller 219,476 21 *
Stepper Motor Controller 772,842 120 *
Time Delay Relay 572,071 88
Time Delay Relay II jawaharlal@excite.com 261,441 39 *
Touch Switch 304,424 51 *
Video Activated Relay 134,053 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,678 10 *
Water Detector With Sump/Bilge Pump Controller 166,095 18 *
Wire Loop Alarm Alex Meaden 218,408 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 339,001 25 *
12VDC To 120VAC Inverter 1,570,597 691
6V to 12V Converter 546,757 121
Automatic 12V Lead Acid Battery Charger 957,807 248
Automatic Load Sensing Power Switch 181,310 16 *
Car Battery Charger 901,424 159 *
Dual Polarity Power Supply 387,874 84 *
Fixed Voltage Power Supply 325,331 52 *
High Current Power Supply 357,890 66 *
High Voltage High Current Power Supply 278,541 35 *
LASER Power Supply 311,647 28
Portable CD Player Adapter For Car 225,842 12 *
Power Supply 756,907 259 *
Solid State Tesla Coil NEW! 163,487 4
Solid State Tesla Coil/High Voltage Generator 465,534 51
Transformerless Power Supply 478,799 117 *
Voltage Inverter 360,609 51 *
Voltage Inverter II 217,793 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,724 182
3 Watt FM Transmitter Rae XL Tkacik 355,898 83 *
50 Watt Amplifier 525,687 74
8 Note Tune Player 153,186 12 *
8 Watt Audio Amp 392,882 67 *
Aircraft Radio Communications Receiver 297,014 50 *
Crystal Radio 176,043 53 *
Digital Volume Control 355,110 47 *
Electronic Stethoscope 338,902 142 *
FET Audio Mixer 358,930 41
FM Transmitter 1,039,501 420
Guitar Fuzz Effect 264,984 54 *
Microphone Mixer Anatoly I. Shikhatov 265,216 26 *
Mono To Stereo Synthesizer oRbEq 149,158 18 *
One Tube Regenerative Radio NEW! 167,668 4 *
Op Amp Radio 408,307 80 *
Single Chip AM Radio NEW! 113,606 4 *
Single Chip FM Radio NEW! 189,791 1 *
Sound Level Meter 357,555 51 *
Stereo Tube Amplifier Weslee Kinsler 284,068 15 *
Tone Control 325,942 31
Transistor Organ 215,594 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,400 27 *
FM Telephone Bug 247,007 57
Phone Busy Indicator 226,686 24 *
Remote Telephone Ringer 129,849 3 *
Ringing Phone Light Flasher 234,726 35 *
Simple Phone Tap Derek Tombrello 396,582 98 *
Telephone Hold Button 140,773 10
Telephone Recorder 229,078 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.