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
Thursday, February 13, 2025
FM Transmitter34
12VDC To 120VAC Inverter25
Yesterday
Wednesday, February 12, 2025
12V To 24V DC-DC Converter25
12VDC To 120VAC Inverter23
Of All Time 12VDC To 120VAC Inverter1,542,802
FM Transmitter1,018,053

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,056 61 *
Car Alarm Arming Horn Beep Canceller bob 139,404 6 *
Wireless Auto Tachometer 346,690 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,733 29 *
Parallel (Printer) Port Interface 291,113 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,076 63 *
3 Channel Spectrum Analyzer 226,159 20
40W Fluorescent Lamp Inverter Bart Milnes 333,508 60 *
Adjustable Strobe Light 313,278 36
Black Light 286,395 29
Colour (Sound) Organ 294,966 36
Electronic Dice NEW! 192,603 10 *
Fantastic Atom Expander 206,007 25
Flash Slave Trigger 225,028 18 *
Infa-Red Remote Control 641,694 216 *
IR Remote Extender NEW! 136,310 3 *
IR Remote Jammer Carl 270,438 110 *
IR Remote Switch NEW! 160,673 9 *
LASER Transmitter/Receiver 421,876 92
LED Chaser 450,933 83 *
LED Metronome NEW! 102,700 3 *
LED Thermometer 210,113 22 *
Light/Dark Detector 309,278 90 *
Simple Colour Organ 140,404 11 *
Strobe Light 279,138 27 *
TRIAC Light Dimmer 558,114 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,408 122 *
Electromagnetic Levitator NEW! 147,656 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,186 214 *
AC Motor Speed Controller 397,467 29 *
Air Flow Detector 255,308 54 *
Digital Keypad Combination Lock 205,321 20
Low Voltage Alarm 232,740 58 *
Pine Racecar Victory Judge 105,603 1 *
Pulse Width Modulation DC Motor Control 659,892 94
Rain Detector 308,627 112 *
Simple Lie Detector 569,387 323
Simple Polarity Tester Dudley LeRoux 168,840 13 *
Simple Servo Controller 225,261 22 *
Simple Touch Switch NEW! 173,499 6 *
Simple Two Speed Contactor DC Motor Controller 208,808 21 *
Stepper Motor Controller 754,800 120 *
Time Delay Relay 560,160 88
Time Delay Relay II jawaharlal@excite.com 251,236 39 *
Touch Switch 293,683 51 *
Video Activated Relay 124,998 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,368 10 *
Water Detector With Sump/Bilge Pump Controller 156,501 18 *
Wire Loop Alarm Alex Meaden 208,986 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 322,401 25 *
12VDC To 120VAC Inverter 1,542,802 691
6V to 12V Converter 533,195 121
Automatic 12V Lead Acid Battery Charger 942,995 248
Automatic Load Sensing Power Switch 171,188 16 *
Car Battery Charger 888,466 159 *
Dual Polarity Power Supply 375,686 84 *
Fixed Voltage Power Supply 315,733 52 *
High Current Power Supply 345,177 66 *
High Voltage High Current Power Supply 268,119 35 *
LASER Power Supply 300,854 28
Portable CD Player Adapter For Car 215,879 12 *
Power Supply 744,485 259 *
Solid State Tesla Coil NEW! 150,969 4
Solid State Tesla Coil/High Voltage Generator 450,259 51
Transformerless Power Supply 467,823 117 *
Voltage Inverter 345,734 51 *
Voltage Inverter II 207,596 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,999 182
3 Watt FM Transmitter Rae XL Tkacik 341,580 83 *
50 Watt Amplifier 513,471 74
8 Note Tune Player 144,192 12 *
8 Watt Audio Amp 379,031 67 *
Aircraft Radio Communications Receiver 284,274 50 *
Crystal Radio 163,240 53 *
Digital Volume Control 343,276 47 *
Electronic Stethoscope 326,558 142 *
FET Audio Mixer 348,198 41
FM Transmitter 1,018,053 420
Guitar Fuzz Effect 252,270 54 *
Microphone Mixer Anatoly I. Shikhatov 254,893 26 *
Mono To Stereo Synthesizer oRbEq 138,357 18 *
One Tube Regenerative Radio NEW! 150,747 4 *
Op Amp Radio 395,280 80 *
Single Chip AM Radio NEW! 103,645 4 *
Single Chip FM Radio NEW! 177,280 1 *
Sound Level Meter 346,413 51 *
Stereo Tube Amplifier Weslee Kinsler 272,663 15 *
Tone Control 314,343 31
Transistor Organ 204,279 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,844 27 *
FM Telephone Bug 238,386 57
Phone Busy Indicator 217,280 24 *
Remote Telephone Ringer 121,347 3 *
Ringing Phone Light Flasher 222,977 35 *
Simple Phone Tap Derek Tombrello 387,223 98 *
Telephone Hold Button 132,337 10
Telephone Recorder 220,169 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.