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, June 04, 2025		 12VDC To 120VAC Inverter6
FM Transmitter6
Yesterday
Tuesday, June 03, 2025		 Black Light101
Adjustable Strobe Light86
Of All Time 12VDC To 120VAC Inverter1,547,655
FM Transmitter1,021,310

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,361 61 *
Car Alarm Arming Horn Beep Canceller bob 140,492 6 *
Wireless Auto Tachometer 348,191 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,866 29 *
Parallel (Printer) Port Interface 292,935 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,694 63 *
3 Channel Spectrum Analyzer 227,944 20
40W Fluorescent Lamp Inverter Bart Milnes 334,878 60 *
Adjustable Strobe Light 314,957 36
Black Light 288,614 29
Colour (Sound) Organ 296,629 36
Electronic Dice NEW! 194,050 10 *
Fantastic Atom Expander 207,176 25
Flash Slave Trigger 226,470 18 *
Infa-Red Remote Control 643,637 216 *
IR Remote Extender NEW! 137,733 3 *
IR Remote Jammer Carl 272,183 110 *
IR Remote Switch NEW! 162,051 9 *
LASER Transmitter/Receiver 423,797 92
LED Chaser 452,770 83 *
LED Metronome NEW! 104,021 3 *
LED Thermometer 211,385 22 *
Light/Dark Detector 310,593 90 *
Simple Colour Organ 141,616 11 *
Strobe Light 280,491 27 *
TRIAC Light Dimmer 559,858 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 366,081 122 *
Electromagnetic Levitator NEW! 148,967 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,727 214 *
AC Motor Speed Controller 399,635 29 *
Air Flow Detector 256,654 54 *
Digital Keypad Combination Lock 206,560 20
Low Voltage Alarm 234,134 58 *
Pine Racecar Victory Judge 106,797 1 *
Pulse Width Modulation DC Motor Control 661,729 94
Rain Detector 310,137 112 *
Simple Lie Detector 571,223 323
Simple Polarity Tester Dudley LeRoux 170,157 13 *
Simple Servo Controller 226,811 22 *
Simple Touch Switch NEW! 174,966 6 *
Simple Two Speed Contactor DC Motor Controller 210,350 21 *
Stepper Motor Controller 757,993 120 *
Time Delay Relay 561,973 88
Time Delay Relay II jawaharlal@excite.com 252,628 39 *
Touch Switch 295,252 51 *
Video Activated Relay 126,206 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,750 10 *
Water Detector With Sump/Bilge Pump Controller 157,732 18 *
Wire Loop Alarm Alex Meaden 210,287 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,738 25 *
12VDC To 120VAC Inverter 1,547,655 691
6V to 12V Converter 535,230 121
Automatic 12V Lead Acid Battery Charger 945,130 248
Automatic Load Sensing Power Switch 172,606 16 *
Car Battery Charger 890,394 159 *
Dual Polarity Power Supply 377,426 84 *
Fixed Voltage Power Supply 317,144 52 *
High Current Power Supply 347,138 66 *
High Voltage High Current Power Supply 269,699 35 *
LASER Power Supply 302,485 28
Portable CD Player Adapter For Car 217,239 12 *
Power Supply 746,444 259 *
Solid State Tesla Coil NEW! 152,693 4
Solid State Tesla Coil/High Voltage Generator 452,518 51
Transformerless Power Supply 469,518 117 *
Voltage Inverter 348,187 51 *
Voltage Inverter II 209,178 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,629 182
3 Watt FM Transmitter Rae XL Tkacik 343,808 83 *
50 Watt Amplifier 515,344 74
8 Note Tune Player 145,472 12 *
8 Watt Audio Amp 380,993 67 *
Aircraft Radio Communications Receiver 286,382 50 *
Crystal Radio 165,091 53 *
Digital Volume Control 345,331 47 *
Electronic Stethoscope 328,347 142 *
FET Audio Mixer 349,994 41
FM Transmitter 1,021,310 420
Guitar Fuzz Effect 254,242 54 *
Microphone Mixer Anatoly I. Shikhatov 256,450 26 *
Mono To Stereo Synthesizer oRbEq 139,924 18 *
One Tube Regenerative Radio NEW! 153,700 4 *
Op Amp Radio 397,438 80 *
Single Chip AM Radio NEW! 105,064 4 *
Single Chip FM Radio NEW! 179,114 1 *
Sound Level Meter 348,175 51 *
Stereo Tube Amplifier Weslee Kinsler 274,287 15 *
Tone Control 316,033 31
Transistor Organ 206,001 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 168,014 27 *
FM Telephone Bug 239,596 57
Phone Busy Indicator 218,638 24 *
Remote Telephone Ringer 122,504 3 *
Ringing Phone Light Flasher 224,661 35 *
Simple Phone Tap Derek Tombrello 388,613 98 *
Telephone Hold Button 133,594 10
Telephone Recorder 221,468 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.