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
Sunday, November 01, 2026		 IR Remote Jammer10
Rain Detector10
Yesterday
Saturday, October 31, 2026		 12VDC To 120VAC Inverter62
Ringing Phone Light Flasher55
Of All Time 12VDC To 120VAC Inverter1,570,952
FM Transmitter1,039,758

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,427 61 *
Car Alarm Arming Horn Beep Canceller bob 147,863 6 *
Wireless Auto Tachometer 357,257 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 171,036 29 *
Parallel (Printer) Port Interface 304,104 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 464,078 63 *
3 Channel Spectrum Analyzer 237,819 20
40W Fluorescent Lamp Inverter Bart Milnes 343,534 60 *
Adjustable Strobe Light 324,961 36
Black Light 300,345 29
Colour (Sound) Organ 307,452 36
Electronic Dice NEW! 203,304 10 *
Fantastic Atom Expander 215,168 25
Flash Slave Trigger 236,083 18 *
Infa-Red Remote Control 655,557 216 *
IR Remote Extender NEW! 146,671 3 *
IR Remote Jammer Carl 281,986 110 *
IR Remote Switch NEW! 170,849 9 *
LASER Transmitter/Receiver 434,143 92
LED Chaser 464,368 83 *
LED Metronome NEW! 112,642 3 *
LED Thermometer 219,146 22 *
Light/Dark Detector 318,777 90 *
Simple Colour Organ 149,701 11 *
Strobe Light 288,923 27 *
TRIAC Light Dimmer 571,261 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 377,011 122 *
Electromagnetic Levitator NEW! 157,005 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,861 214 *
AC Motor Speed Controller 411,582 29 *
Air Flow Detector 265,322 54 *
Digital Keypad Combination Lock 214,706 20
Low Voltage Alarm 243,180 58 *
Pine Racecar Victory Judge 114,420 1 *
Pulse Width Modulation DC Motor Control 672,891 94
Rain Detector 319,264 112 *
Simple Lie Detector 581,725 323
Simple Polarity Tester Dudley LeRoux 179,152 13 *
Simple Servo Controller 236,137 22 *
Simple Touch Switch NEW! 184,175 6 *
Simple Two Speed Contactor DC Motor Controller 219,623 21 *
Stepper Motor Controller 773,021 120 *
Time Delay Relay 572,224 88
Time Delay Relay II jawaharlal@excite.com 261,566 39 *
Touch Switch 304,563 51 *
Video Activated Relay 134,209 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,837 10 *
Water Detector With Sump/Bilge Pump Controller 166,206 18 *
Wire Loop Alarm Alex Meaden 218,550 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 339,175 25 *
12VDC To 120VAC Inverter 1,570,952 691
6V to 12V Converter 546,926 121
Automatic 12V Lead Acid Battery Charger 958,000 248
Automatic Load Sensing Power Switch 181,422 16 *
Car Battery Charger 901,596 159 *
Dual Polarity Power Supply 388,016 84 *
Fixed Voltage Power Supply 325,453 52 *
High Current Power Supply 358,045 66 *
High Voltage High Current Power Supply 278,674 35 *
LASER Power Supply 311,787 28
Portable CD Player Adapter For Car 225,983 12 *
Power Supply 757,095 259 *
Solid State Tesla Coil NEW! 163,653 4
Solid State Tesla Coil/High Voltage Generator 465,704 51
Transformerless Power Supply 478,957 117 *
Voltage Inverter 360,800 51 *
Voltage Inverter II 217,945 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,850 182
3 Watt FM Transmitter Rae XL Tkacik 356,055 83 *
50 Watt Amplifier 525,826 74
8 Note Tune Player 153,314 12 *
8 Watt Audio Amp 393,043 67 *
Aircraft Radio Communications Receiver 297,165 50 *
Crystal Radio 176,184 53 *
Digital Volume Control 355,262 47 *
Electronic Stethoscope 339,045 142 *
FET Audio Mixer 359,108 41
FM Transmitter 1,039,758 420
Guitar Fuzz Effect 265,134 54 *
Microphone Mixer Anatoly I. Shikhatov 265,356 26 *
Mono To Stereo Synthesizer oRbEq 149,294 18 *
One Tube Regenerative Radio NEW! 167,965 4 *
Op Amp Radio 408,533 80 *
Single Chip AM Radio NEW! 113,751 4 *
Single Chip FM Radio NEW! 189,977 1 *
Sound Level Meter 357,729 51 *
Stereo Tube Amplifier Weslee Kinsler 284,226 15 *
Tone Control 326,086 31
Transistor Organ 215,759 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,526 27 *
FM Telephone Bug 247,152 57
Phone Busy Indicator 226,817 24 *
Remote Telephone Ringer 129,996 3 *
Ringing Phone Light Flasher 234,900 35 *
Simple Phone Tap Derek Tombrello 396,696 98 *
Telephone Hold Button 140,896 10
Telephone Recorder 229,201 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.