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, May 21, 2025		 12VDC To 120VAC Inverter44
Transistor Organ29
Yesterday
Tuesday, May 20, 2025		 12VDC To 120VAC Inverter42
Sound Level Meter32
Of All Time 12VDC To 120VAC Inverter1,546,934
FM Transmitter1,020,810

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,104 61 *
Car Alarm Arming Horn Beep Canceller bob 140,281 6 *
Wireless Auto Tachometer 347,910 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,665 29 *
Parallel (Printer) Port Interface 292,631 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,411 63 *
3 Channel Spectrum Analyzer 227,633 20
40W Fluorescent Lamp Inverter Bart Milnes 334,611 60 *
Adjustable Strobe Light 314,662 36
Black Light 288,226 29
Colour (Sound) Organ 296,322 36
Electronic Dice NEW! 193,798 10 *
Fantastic Atom Expander 206,963 25
Flash Slave Trigger 226,219 18 *
Infa-Red Remote Control 643,217 216 *
IR Remote Extender NEW! 137,488 3 *
IR Remote Jammer Carl 271,888 110 *
IR Remote Switch NEW! 161,794 9 *
LASER Transmitter/Receiver 423,425 92
LED Chaser 452,428 83 *
LED Metronome NEW! 103,786 3 *
LED Thermometer 211,139 22 *
Light/Dark Detector 310,370 90 *
Simple Colour Organ 141,395 11 *
Strobe Light 280,251 27 *
TRIAC Light Dimmer 559,555 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,797 122 *
Electromagnetic Levitator NEW! 148,733 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,301 214 *
AC Motor Speed Controller 399,273 29 *
Air Flow Detector 256,444 54 *
Digital Keypad Combination Lock 206,349 20
Low Voltage Alarm 233,882 58 *
Pine Racecar Victory Judge 106,572 1 *
Pulse Width Modulation DC Motor Control 661,427 94
Rain Detector 309,908 112 *
Simple Lie Detector 570,902 323
Simple Polarity Tester Dudley LeRoux 169,932 13 *
Simple Servo Controller 226,549 22 *
Simple Touch Switch NEW! 174,724 6 *
Simple Two Speed Contactor DC Motor Controller 210,041 21 *
Stepper Motor Controller 757,494 120 *
Time Delay Relay 561,678 88
Time Delay Relay II jawaharlal@excite.com 252,364 39 *
Touch Switch 294,972 51 *
Video Activated Relay 125,973 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,511 10 *
Water Detector With Sump/Bilge Pump Controller 157,509 18 *
Wire Loop Alarm Alex Meaden 210,046 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,376 25 *
12VDC To 120VAC Inverter 1,546,934 691
6V to 12V Converter 534,904 121
Automatic 12V Lead Acid Battery Charger 944,759 248
Automatic Load Sensing Power Switch 172,329 16 *
Car Battery Charger 890,066 159 *
Dual Polarity Power Supply 377,099 84 *
Fixed Voltage Power Supply 316,895 52 *
High Current Power Supply 346,814 66 *
High Voltage High Current Power Supply 269,406 35 *
LASER Power Supply 302,209 28
Portable CD Player Adapter For Car 216,998 12 *
Power Supply 746,123 259 *
Solid State Tesla Coil NEW! 152,400 4
Solid State Tesla Coil/High Voltage Generator 452,122 51
Transformerless Power Supply 469,237 117 *
Voltage Inverter 347,828 51 *
Voltage Inverter II 208,905 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,335 182
3 Watt FM Transmitter Rae XL Tkacik 343,461 83 *
50 Watt Amplifier 515,009 74
8 Note Tune Player 145,265 12 *
8 Watt Audio Amp 380,650 67 *
Aircraft Radio Communications Receiver 286,018 50 *
Crystal Radio 164,792 53 *
Digital Volume Control 344,885 47 *
Electronic Stethoscope 328,043 142 *
FET Audio Mixer 349,712 41
FM Transmitter 1,020,810 420
Guitar Fuzz Effect 253,915 54 *
Microphone Mixer Anatoly I. Shikhatov 256,183 26 *
Mono To Stereo Synthesizer oRbEq 139,627 18 *
One Tube Regenerative Radio NEW! 153,242 4 *
Op Amp Radio 397,082 80 *
Single Chip AM Radio NEW! 104,816 4 *
Single Chip FM Radio NEW! 178,830 1 *
Sound Level Meter 347,857 51 *
Stereo Tube Amplifier Weslee Kinsler 274,006 15 *
Tone Control 315,697 31
Transistor Organ 205,712 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,810 27 *
FM Telephone Bug 239,369 57
Phone Busy Indicator 218,407 24 *
Remote Telephone Ringer 122,270 3 *
Ringing Phone Light Flasher 224,385 35 *
Simple Phone Tap Derek Tombrello 388,386 98 *
Telephone Hold Button 133,361 10
Telephone Recorder 221,234 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.