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
Tuesday, May 13, 2025		 FM Transmitter46
12VDC To 120VAC Inverter33
Yesterday
Monday, May 12, 2025		 12VDC To 120VAC Inverter39
7 Segment LED Counter36
Of All Time 12VDC To 120VAC Inverter1,546,598
FM Transmitter1,020,532

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,024 61 *
Car Alarm Arming Horn Beep Canceller bob 140,213 6 *
Wireless Auto Tachometer 347,805 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,575 29 *
Parallel (Printer) Port Interface 292,498 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,311 63 *
3 Channel Spectrum Analyzer 227,519 20
40W Fluorescent Lamp Inverter Bart Milnes 334,527 60 *
Adjustable Strobe Light 314,548 36
Black Light 288,063 29
Colour (Sound) Organ 296,214 36
Electronic Dice NEW! 193,707 10 *
Fantastic Atom Expander 206,882 25
Flash Slave Trigger 226,130 18 *
Infa-Red Remote Control 643,073 216 *
IR Remote Extender NEW! 137,394 3 *
IR Remote Jammer Carl 271,761 110 *
IR Remote Switch NEW! 161,684 9 *
LASER Transmitter/Receiver 423,278 92
LED Chaser 452,310 83 *
LED Metronome NEW! 103,693 3 *
LED Thermometer 211,063 22 *
Light/Dark Detector 310,280 90 *
Simple Colour Organ 141,296 11 *
Strobe Light 280,164 27 *
TRIAC Light Dimmer 559,440 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,676 122 *
Electromagnetic Levitator NEW! 148,631 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,100 214 *
AC Motor Speed Controller 399,123 29 *
Air Flow Detector 256,352 54 *
Digital Keypad Combination Lock 206,266 20
Low Voltage Alarm 233,792 58 *
Pine Racecar Victory Judge 106,489 1 *
Pulse Width Modulation DC Motor Control 661,317 94
Rain Detector 309,803 112 *
Simple Lie Detector 570,778 323
Simple Polarity Tester Dudley LeRoux 169,826 13 *
Simple Servo Controller 226,439 22 *
Simple Touch Switch NEW! 174,599 6 *
Simple Two Speed Contactor DC Motor Controller 209,943 21 *
Stepper Motor Controller 757,271 120 *
Time Delay Relay 561,558 88
Time Delay Relay II jawaharlal@excite.com 252,275 39 *
Touch Switch 294,880 51 *
Video Activated Relay 125,893 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,417 10 *
Water Detector With Sump/Bilge Pump Controller 157,436 18 *
Wire Loop Alarm Alex Meaden 209,956 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,188 25 *
12VDC To 120VAC Inverter 1,546,598 691
6V to 12V Converter 534,793 121
Automatic 12V Lead Acid Battery Charger 944,605 248
Automatic Load Sensing Power Switch 172,237 16 *
Car Battery Charger 889,934 159 *
Dual Polarity Power Supply 376,948 84 *
Fixed Voltage Power Supply 316,790 52 *
High Current Power Supply 346,657 66 *
High Voltage High Current Power Supply 269,293 35 *
LASER Power Supply 302,110 28
Portable CD Player Adapter For Car 216,908 12 *
Power Supply 745,975 259 *
Solid State Tesla Coil NEW! 152,267 4
Solid State Tesla Coil/High Voltage Generator 451,950 51
Transformerless Power Supply 469,102 117 *
Voltage Inverter 347,657 51 *
Voltage Inverter II 208,804 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,218 182
3 Watt FM Transmitter Rae XL Tkacik 343,303 83 *
50 Watt Amplifier 514,868 74
8 Note Tune Player 145,159 12 *
8 Watt Audio Amp 380,494 67 *
Aircraft Radio Communications Receiver 285,847 50 *
Crystal Radio 164,677 53 *
Digital Volume Control 344,499 47 *
Electronic Stethoscope 327,903 142 *
FET Audio Mixer 349,593 41
FM Transmitter 1,020,532 420
Guitar Fuzz Effect 253,768 54 *
Microphone Mixer Anatoly I. Shikhatov 256,065 26 *
Mono To Stereo Synthesizer oRbEq 139,506 18 *
One Tube Regenerative Radio NEW! 153,040 4 *
Op Amp Radio 396,930 80 *
Single Chip AM Radio NEW! 104,714 4 *
Single Chip FM Radio NEW! 178,708 1 *
Sound Level Meter 347,728 51 *
Stereo Tube Amplifier Weslee Kinsler 273,909 15 *
Tone Control 315,581 31
Transistor Organ 205,591 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,726 27 *
FM Telephone Bug 239,296 57
Phone Busy Indicator 218,310 24 *
Remote Telephone Ringer 122,175 3 *
Ringing Phone Light Flasher 224,268 35 *
Simple Phone Tap Derek Tombrello 388,290 98 *
Telephone Hold Button 133,271 10
Telephone Recorder 221,131 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.