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
Wednesday, April 23, 2025		 Stepper Motor Controller15
Solid State Tesla Coil/High Voltage Generator9
Yesterday
Tuesday, April 22, 2025		 12VDC To 120VAC Inverter51
Stepper Motor Controller25
Of All Time 12VDC To 120VAC Inverter1,545,489
FM Transmitter1,019,838

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,770 61 *
Car Alarm Arming Horn Beep Canceller bob 140,018 6 *
Wireless Auto Tachometer 347,521 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,382 29 *
Parallel (Printer) Port Interface 292,152 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,034 63 *
3 Channel Spectrum Analyzer 227,184 20
40W Fluorescent Lamp Inverter Bart Milnes 334,288 60 *
Adjustable Strobe Light 314,219 36
Black Light 287,667 29
Colour (Sound) Organ 295,917 36
Electronic Dice NEW! 193,386 10 *
Fantastic Atom Expander 206,663 25
Flash Slave Trigger 225,856 18 *
Infa-Red Remote Control 642,721 216 *
IR Remote Extender NEW! 137,120 3 *
IR Remote Jammer Carl 271,435 110 *
IR Remote Switch NEW! 161,414 9 *
LASER Transmitter/Receiver 422,897 92
LED Chaser 451,983 83 *
LED Metronome NEW! 103,439 3 *
LED Thermometer 210,833 22 *
Light/Dark Detector 310,054 90 *
Simple Colour Organ 141,068 11 *
Strobe Light 279,931 27 *
TRIAC Light Dimmer 559,111 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,390 122 *
Electromagnetic Levitator NEW! 148,402 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,525 214 *
AC Motor Speed Controller 398,689 29 *
Air Flow Detector 256,105 54 *
Digital Keypad Combination Lock 206,044 20
Low Voltage Alarm 233,516 58 *
Pine Racecar Victory Judge 106,267 1 *
Pulse Width Modulation DC Motor Control 660,948 94
Rain Detector 309,476 112 *
Simple Lie Detector 570,438 323
Simple Polarity Tester Dudley LeRoux 169,576 13 *
Simple Servo Controller 226,137 22 *
Simple Touch Switch NEW! 174,303 6 *
Simple Two Speed Contactor DC Motor Controller 209,655 21 *
Stepper Motor Controller 756,635 120 *
Time Delay Relay 561,209 88
Time Delay Relay II jawaharlal@excite.com 252,028 39 *
Touch Switch 294,543 51 *
Video Activated Relay 125,686 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,172 10 *
Water Detector With Sump/Bilge Pump Controller 157,228 18 *
Wire Loop Alarm Alex Meaden 209,713 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,725 25 *
12VDC To 120VAC Inverter 1,545,489 691
6V to 12V Converter 534,426 121
Automatic 12V Lead Acid Battery Charger 944,221 248
Automatic Load Sensing Power Switch 171,972 16 *
Car Battery Charger 889,557 159 *
Dual Polarity Power Supply 376,638 84 *
Fixed Voltage Power Supply 316,536 52 *
High Current Power Supply 346,266 66 *
High Voltage High Current Power Supply 268,994 35 *
LASER Power Supply 301,816 28
Portable CD Player Adapter For Car 216,656 12 *
Power Supply 745,548 259 *
Solid State Tesla Coil NEW! 151,950 4
Solid State Tesla Coil/High Voltage Generator 451,514 51
Transformerless Power Supply 468,755 117 *
Voltage Inverter 347,204 51 *
Voltage Inverter II 208,488 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,946 182
3 Watt FM Transmitter Rae XL Tkacik 342,876 83 *
50 Watt Amplifier 514,522 74
8 Note Tune Player 144,919 12 *
8 Watt Audio Amp 380,118 67 *
Aircraft Radio Communications Receiver 285,475 50 *
Crystal Radio 164,310 53 *
Digital Volume Control 344,201 47 *
Electronic Stethoscope 327,594 142 *
FET Audio Mixer 349,209 41
FM Transmitter 1,019,838 420
Guitar Fuzz Effect 253,389 54 *
Microphone Mixer Anatoly I. Shikhatov 255,781 26 *
Mono To Stereo Synthesizer oRbEq 139,248 18 *
One Tube Regenerative Radio NEW! 152,498 4 *
Op Amp Radio 396,531 80 *
Single Chip AM Radio NEW! 104,441 4 *
Single Chip FM Radio NEW! 178,387 1 *
Sound Level Meter 347,361 51 *
Stereo Tube Amplifier Weslee Kinsler 273,650 15 *
Tone Control 315,296 31
Transistor Organ 205,310 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,496 27 *
FM Telephone Bug 239,076 57
Phone Busy Indicator 218,054 24 *
Remote Telephone Ringer 121,957 3 *
Ringing Phone Light Flasher 223,947 35 *
Simple Phone Tap Derek Tombrello 388,057 98 *
Telephone Hold Button 133,034 10
Telephone Recorder 220,898 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.