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, June 07, 2025		 Black Light19
Infa-Red Remote Control19
Yesterday
Friday, June 06, 2025		 Stepper Motor Controller84
Infa-Red Remote Control81
Of All Time 12VDC To 120VAC Inverter1,547,962
FM Transmitter1,021,570

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,581 61 *
Car Alarm Arming Horn Beep Canceller bob 140,708 6 *
Wireless Auto Tachometer 348,425 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 164,088 29 *
Parallel (Printer) Port Interface 293,150 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,938 63 *
3 Channel Spectrum Analyzer 228,182 20
40W Fluorescent Lamp Inverter Bart Milnes 335,096 60 *
Adjustable Strobe Light 315,240 36
Black Light 288,930 29
Colour (Sound) Organ 296,869 36
Electronic Dice NEW! 194,285 10 *
Fantastic Atom Expander 207,405 25
Flash Slave Trigger 226,702 18 *
Infa-Red Remote Control 643,936 216 *
IR Remote Extender NEW! 137,962 3 *
IR Remote Jammer Carl 272,417 110 *
IR Remote Switch NEW! 162,279 9 *
LASER Transmitter/Receiver 424,013 92
LED Chaser 453,018 83 *
LED Metronome NEW! 104,244 3 *
LED Thermometer 211,607 22 *
Light/Dark Detector 310,818 90 *
Simple Colour Organ 141,835 11 *
Strobe Light 280,706 27 *
TRIAC Light Dimmer 560,082 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 366,304 122 *
Electromagnetic Levitator NEW! 149,174 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,972 214 *
AC Motor Speed Controller 399,865 29 *
Air Flow Detector 256,855 54 *
Digital Keypad Combination Lock 206,771 20
Low Voltage Alarm 234,345 58 *
Pine Racecar Victory Judge 106,997 1 *
Pulse Width Modulation DC Motor Control 661,952 94
Rain Detector 310,347 112 *
Simple Lie Detector 571,449 323
Simple Polarity Tester Dudley LeRoux 170,367 13 *
Simple Servo Controller 227,059 22 *
Simple Touch Switch NEW! 175,180 6 *
Simple Two Speed Contactor DC Motor Controller 210,572 21 *
Stepper Motor Controller 758,329 120 *
Time Delay Relay 562,182 88
Time Delay Relay II jawaharlal@excite.com 252,840 39 *
Touch Switch 295,450 51 *
Video Activated Relay 126,405 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,947 10 *
Water Detector With Sump/Bilge Pump Controller 157,928 18 *
Wire Loop Alarm Alex Meaden 210,490 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,961 25 *
12VDC To 120VAC Inverter 1,547,962 691
6V to 12V Converter 535,448 121
Automatic 12V Lead Acid Battery Charger 945,403 248
Automatic Load Sensing Power Switch 172,821 16 *
Car Battery Charger 890,612 159 *
Dual Polarity Power Supply 377,636 84 *
Fixed Voltage Power Supply 317,350 52 *
High Current Power Supply 347,352 66 *
High Voltage High Current Power Supply 269,902 35 *
LASER Power Supply 302,702 28
Portable CD Player Adapter For Car 217,450 12 *
Power Supply 746,652 259 *
Solid State Tesla Coil NEW! 152,914 4
Solid State Tesla Coil/High Voltage Generator 452,758 51
Transformerless Power Supply 469,729 117 *
Voltage Inverter 348,422 51 *
Voltage Inverter II 209,384 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,863 182
3 Watt FM Transmitter Rae XL Tkacik 344,042 83 *
50 Watt Amplifier 515,576 74
8 Note Tune Player 145,681 12 *
8 Watt Audio Amp 381,231 67 *
Aircraft Radio Communications Receiver 286,614 50 *
Crystal Radio 165,299 53 *
Digital Volume Control 345,564 47 *
Electronic Stethoscope 328,583 142 *
FET Audio Mixer 350,204 41
FM Transmitter 1,021,570 420
Guitar Fuzz Effect 254,470 54 *
Microphone Mixer Anatoly I. Shikhatov 256,663 26 *
Mono To Stereo Synthesizer oRbEq 140,170 18 *
One Tube Regenerative Radio NEW! 153,995 4 *
Op Amp Radio 397,677 80 *
Single Chip AM Radio NEW! 105,284 4 *
Single Chip FM Radio NEW! 179,333 1 *
Sound Level Meter 348,391 51 *
Stereo Tube Amplifier Weslee Kinsler 274,512 15 *
Tone Control 316,261 31
Transistor Organ 206,208 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 168,222 27 *
FM Telephone Bug 239,809 57
Phone Busy Indicator 218,851 24 *
Remote Telephone Ringer 122,713 3 *
Ringing Phone Light Flasher 224,871 35 *
Simple Phone Tap Derek Tombrello 388,819 98 *
Telephone Hold Button 133,810 10
Telephone Recorder 221,683 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.