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, May 11, 2025		 FM Transmitter35
12VDC To 120VAC Inverter24
Yesterday
Saturday, May 10, 2025		 12VDC To 120VAC Inverter44
Voltage Inverter29
Of All Time 12VDC To 120VAC Inverter1,546,521
FM Transmitter1,020,449

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,004 61 *
Car Alarm Arming Horn Beep Canceller bob 140,197 6 *
Wireless Auto Tachometer 347,777 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,561 29 *
Parallel (Printer) Port Interface 292,467 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,291 63 *
3 Channel Spectrum Analyzer 227,482 20
40W Fluorescent Lamp Inverter Bart Milnes 334,509 60 *
Adjustable Strobe Light 314,518 36
Black Light 288,023 29
Colour (Sound) Organ 296,198 36
Electronic Dice NEW! 193,677 10 *
Fantastic Atom Expander 206,865 25
Flash Slave Trigger 226,112 18 *
Infa-Red Remote Control 643,039 216 *
IR Remote Extender NEW! 137,374 3 *
IR Remote Jammer Carl 271,740 110 *
IR Remote Switch NEW! 161,673 9 *
LASER Transmitter/Receiver 423,253 92
LED Chaser 452,262 83 *
LED Metronome NEW! 103,676 3 *
LED Thermometer 211,047 22 *
Light/Dark Detector 310,260 90 *
Simple Colour Organ 141,279 11 *
Strobe Light 280,140 27 *
TRIAC Light Dimmer 559,419 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,650 122 *
Electromagnetic Levitator NEW! 148,612 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,030 214 *
AC Motor Speed Controller 399,075 29 *
Air Flow Detector 256,329 54 *
Digital Keypad Combination Lock 206,248 20
Low Voltage Alarm 233,764 58 *
Pine Racecar Victory Judge 106,473 1 *
Pulse Width Modulation DC Motor Control 661,283 94
Rain Detector 309,777 112 *
Simple Lie Detector 570,745 323
Simple Polarity Tester Dudley LeRoux 169,804 13 *
Simple Servo Controller 226,407 22 *
Simple Touch Switch NEW! 174,579 6 *
Simple Two Speed Contactor DC Motor Controller 209,914 21 *
Stepper Motor Controller 757,216 120 *
Time Delay Relay 561,520 88
Time Delay Relay II jawaharlal@excite.com 252,244 39 *
Touch Switch 294,846 51 *
Video Activated Relay 125,872 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,395 10 *
Water Detector With Sump/Bilge Pump Controller 157,413 18 *
Wire Loop Alarm Alex Meaden 209,937 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,150 25 *
12VDC To 120VAC Inverter 1,546,521 691
6V to 12V Converter 534,753 121
Automatic 12V Lead Acid Battery Charger 944,569 248
Automatic Load Sensing Power Switch 172,206 16 *
Car Battery Charger 889,898 159 *
Dual Polarity Power Supply 376,923 84 *
Fixed Voltage Power Supply 316,775 52 *
High Current Power Supply 346,612 66 *
High Voltage High Current Power Supply 269,267 35 *
LASER Power Supply 302,085 28
Portable CD Player Adapter For Car 216,873 12 *
Power Supply 745,944 259 *
Solid State Tesla Coil NEW! 152,243 4
Solid State Tesla Coil/High Voltage Generator 451,920 51
Transformerless Power Supply 469,075 117 *
Voltage Inverter 347,621 51 *
Voltage Inverter II 208,773 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,196 182
3 Watt FM Transmitter Rae XL Tkacik 343,274 83 *
50 Watt Amplifier 514,831 74
8 Note Tune Player 145,133 12 *
8 Watt Audio Amp 380,450 67 *
Aircraft Radio Communications Receiver 285,819 50 *
Crystal Radio 164,646 53 *
Digital Volume Control 344,469 47 *
Electronic Stethoscope 327,881 142 *
FET Audio Mixer 349,548 41
FM Transmitter 1,020,449 420
Guitar Fuzz Effect 253,730 54 *
Microphone Mixer Anatoly I. Shikhatov 256,033 26 *
Mono To Stereo Synthesizer oRbEq 139,475 18 *
One Tube Regenerative Radio NEW! 152,993 4 *
Op Amp Radio 396,877 80 *
Single Chip AM Radio NEW! 104,692 4 *
Single Chip FM Radio NEW! 178,678 1 *
Sound Level Meter 347,681 51 *
Stereo Tube Amplifier Weslee Kinsler 273,885 15 *
Tone Control 315,554 31
Transistor Organ 205,569 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,709 27 *
FM Telephone Bug 239,275 57
Phone Busy Indicator 218,292 24 *
Remote Telephone Ringer 122,160 3 *
Ringing Phone Light Flasher 224,233 35 *
Simple Phone Tap Derek Tombrello 388,269 98 *
Telephone Hold Button 133,251 10
Telephone Recorder 221,119 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.