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, February 22, 2025		 12VDC To 120VAC Inverter40
Op Amp Radio33
Yesterday
Friday, February 21, 2025		 12VDC To 120VAC Inverter38
Stepper Motor Controller35
Of All Time 12VDC To 120VAC Inverter1,543,157
FM Transmitter1,018,299

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,140 61 *
Car Alarm Arming Horn Beep Canceller bob 139,492 6 *
Wireless Auto Tachometer 346,801 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,817 29 *
Parallel (Printer) Port Interface 291,250 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,197 63 *
3 Channel Spectrum Analyzer 226,277 20
40W Fluorescent Lamp Inverter Bart Milnes 333,617 60 *
Adjustable Strobe Light 313,401 36
Black Light 286,580 29
Colour (Sound) Organ 295,114 36
Electronic Dice NEW! 192,701 10 *
Fantastic Atom Expander 206,094 25
Flash Slave Trigger 225,123 18 *
Infa-Red Remote Control 641,847 216 *
IR Remote Extender NEW! 136,413 3 *
IR Remote Jammer Carl 270,558 110 *
IR Remote Switch NEW! 160,776 9 *
LASER Transmitter/Receiver 422,011 92
LED Chaser 451,082 83 *
LED Metronome NEW! 102,801 3 *
LED Thermometer 210,206 22 *
Light/Dark Detector 309,393 90 *
Simple Colour Organ 140,486 11 *
Strobe Light 279,241 27 *
TRIAC Light Dimmer 558,241 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,549 122 *
Electromagnetic Levitator NEW! 147,762 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,378 214 *
AC Motor Speed Controller 397,652 29 *
Air Flow Detector 255,417 54 *
Digital Keypad Combination Lock 205,421 20
Low Voltage Alarm 232,852 58 *
Pine Racecar Victory Judge 105,697 1 *
Pulse Width Modulation DC Motor Control 660,040 94
Rain Detector 308,754 112 *
Simple Lie Detector 569,533 323
Simple Polarity Tester Dudley LeRoux 168,948 13 *
Simple Servo Controller 225,368 22 *
Simple Touch Switch NEW! 173,606 6 *
Simple Two Speed Contactor DC Motor Controller 208,928 21 *
Stepper Motor Controller 755,074 120 *
Time Delay Relay 560,307 88
Time Delay Relay II jawaharlal@excite.com 251,352 39 *
Touch Switch 293,807 51 *
Video Activated Relay 125,088 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,481 10 *
Water Detector With Sump/Bilge Pump Controller 156,599 18 *
Wire Loop Alarm Alex Meaden 209,089 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 322,592 25 *
12VDC To 120VAC Inverter 1,543,157 691
6V to 12V Converter 533,365 121
Automatic 12V Lead Acid Battery Charger 943,162 248
Automatic Load Sensing Power Switch 171,297 16 *
Car Battery Charger 888,623 159 *
Dual Polarity Power Supply 375,818 84 *
Fixed Voltage Power Supply 315,858 52 *
High Current Power Supply 345,332 66 *
High Voltage High Current Power Supply 268,268 35 *
LASER Power Supply 300,999 28
Portable CD Player Adapter For Car 215,972 12 *
Power Supply 744,622 259 *
Solid State Tesla Coil NEW! 151,097 4
Solid State Tesla Coil/High Voltage Generator 450,435 51
Transformerless Power Supply 467,946 117 *
Voltage Inverter 345,916 51 *
Voltage Inverter II 207,729 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,126 182
3 Watt FM Transmitter Rae XL Tkacik 341,761 83 *
50 Watt Amplifier 513,612 74
8 Note Tune Player 144,299 12 *
8 Watt Audio Amp 379,178 67 *
Aircraft Radio Communications Receiver 284,423 50 *
Crystal Radio 163,413 53 *
Digital Volume Control 343,405 47 *
Electronic Stethoscope 326,743 142 *
FET Audio Mixer 348,354 41
FM Transmitter 1,018,299 420
Guitar Fuzz Effect 252,402 54 *
Microphone Mixer Anatoly I. Shikhatov 255,010 26 *
Mono To Stereo Synthesizer oRbEq 138,473 18 *
One Tube Regenerative Radio NEW! 150,988 4 *
Op Amp Radio 395,459 80 *
Single Chip AM Radio NEW! 103,755 4 *
Single Chip FM Radio NEW! 177,476 1 *
Sound Level Meter 346,561 51 *
Stereo Tube Amplifier Weslee Kinsler 272,818 15 *
Tone Control 314,498 31
Transistor Organ 204,409 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,945 27 *
FM Telephone Bug 238,486 57
Phone Busy Indicator 217,389 24 *
Remote Telephone Ringer 121,424 3 *
Ringing Phone Light Flasher 223,117 35 *
Simple Phone Tap Derek Tombrello 387,327 98 *
Telephone Hold Button 132,437 10
Telephone Recorder 220,283 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.