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, July 18, 2026		 Video Stabilizer/MacroVision Removal78
12VDC To 120VAC Inverter19
Yesterday
Friday, July 17, 2026		 12VDC To 120VAC Inverter35
Automatic 12V Lead Acid Battery Charger31
Of All Time 12VDC To 120VAC Inverter1,566,583
FM Transmitter1,036,656

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,936 61 *
Car Alarm Arming Horn Beep Canceller bob 146,508 6 *
Wireless Auto Tachometer 355,536 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,564 29 *
Parallel (Printer) Port Interface 301,837 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,035 63 *
3 Channel Spectrum Analyzer 235,780 20
40W Fluorescent Lamp Inverter Bart Milnes 341,898 60 *
Adjustable Strobe Light 322,953 36
Black Light 298,105 29
Colour (Sound) Organ 305,246 36
Electronic Dice NEW! 201,483 10 *
Fantastic Atom Expander 213,474 25
Flash Slave Trigger 234,011 18 *
Infa-Red Remote Control 653,208 216 *
IR Remote Extender NEW! 144,781 3 *
IR Remote Jammer Carl 280,164 110 *
IR Remote Switch NEW! 169,048 9 *
LASER Transmitter/Receiver 432,279 92
LED Chaser 462,202 83 *
LED Metronome NEW! 110,963 3 *
LED Thermometer 217,618 22 *
Light/Dark Detector 317,115 90 *
Simple Colour Organ 147,997 11 *
Strobe Light 287,073 27 *
TRIAC Light Dimmer 569,119 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 374,888 122 *
Electromagnetic Levitator NEW! 155,532 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,111 214 *
AC Motor Speed Controller 409,480 29 *
Air Flow Detector 263,642 54 *
Digital Keypad Combination Lock 213,170 20
Low Voltage Alarm 241,478 58 *
Pine Racecar Victory Judge 112,757 1 *
Pulse Width Modulation DC Motor Control 670,669 94
Rain Detector 317,470 112 *
Simple Lie Detector 579,832 323
Simple Polarity Tester Dudley LeRoux 177,410 13 *
Simple Servo Controller 234,222 22 *
Simple Touch Switch NEW! 182,419 6 *
Simple Two Speed Contactor DC Motor Controller 217,822 21 *
Stepper Motor Controller 770,319 120 *
Time Delay Relay 570,071 88
Time Delay Relay II jawaharlal@excite.com 259,889 39 *
Touch Switch 302,668 51 *
Video Activated Relay 132,385 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 195,219 10 *
Water Detector With Sump/Bilge Pump Controller 164,695 18 *
Wire Loop Alarm Alex Meaden 216,770 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,554 25 *
12VDC To 120VAC Inverter 1,566,583 691
6V to 12V Converter 544,774 121
Automatic 12V Lead Acid Battery Charger 955,564 248
Automatic Load Sensing Power Switch 179,723 16 *
Car Battery Charger 899,568 159 *
Dual Polarity Power Supply 386,255 84 *
Fixed Voltage Power Supply 324,078 52 *
High Current Power Supply 356,318 66 *
High Voltage High Current Power Supply 277,353 35 *
LASER Power Supply 310,153 28
Portable CD Player Adapter For Car 224,408 12 *
Power Supply 755,166 259 *
Solid State Tesla Coil NEW! 161,776 4
Solid State Tesla Coil/High Voltage Generator 463,356 51
Transformerless Power Supply 477,441 117 *
Voltage Inverter 358,716 51 *
Voltage Inverter II 216,428 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,355 182
3 Watt FM Transmitter Rae XL Tkacik 354,181 83 *
50 Watt Amplifier 524,100 74
8 Note Tune Player 151,898 12 *
8 Watt Audio Amp 391,086 67 *
Aircraft Radio Communications Receiver 295,311 50 *
Crystal Radio 174,495 53 *
Digital Volume Control 353,502 47 *
Electronic Stethoscope 337,126 142 *
FET Audio Mixer 357,448 41
FM Transmitter 1,036,656 420
Guitar Fuzz Effect 263,329 54 *
Microphone Mixer Anatoly I. Shikhatov 263,801 26 *
Mono To Stereo Synthesizer oRbEq 147,697 18 *
One Tube Regenerative Radio NEW! 165,579 4 *
Op Amp Radio 406,492 80 *
Single Chip AM Radio NEW! 112,199 4 *
Single Chip FM Radio NEW! 187,798 1 *
Sound Level Meter 356,001 51 *
Stereo Tube Amplifier Weslee Kinsler 282,735 15 *
Tone Control 324,340 31
Transistor Organ 213,756 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,205 27 *
FM Telephone Bug 245,720 57
Phone Busy Indicator 225,315 24 *
Remote Telephone Ringer 128,678 3 *
Ringing Phone Light Flasher 233,273 35 *
Simple Phone Tap Derek Tombrello 395,303 98 *
Telephone Hold Button 139,681 10
Telephone Recorder 227,611 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.