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, July 30, 2026		 Solid State Tesla Coil/High Voltage Generator13
12VDC To 120VAC Inverter11
Yesterday
Wednesday, July 29, 2026		 12VDC To 120VAC Inverter52
Solid State Tesla Coil/High Voltage Generator32
Of All Time 12VDC To 120VAC Inverter1,567,028
FM Transmitter1,036,904

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,094 61 *
Car Alarm Arming Horn Beep Canceller bob 146,636 6 *
Wireless Auto Tachometer 355,712 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,687 29 *
Parallel (Printer) Port Interface 302,025 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,245 63 *
3 Channel Spectrum Analyzer 235,978 20
40W Fluorescent Lamp Inverter Bart Milnes 342,037 60 *
Adjustable Strobe Light 323,163 36
Black Light 298,330 29
Colour (Sound) Organ 305,454 36
Electronic Dice NEW! 201,663 10 *
Fantastic Atom Expander 213,638 25
Flash Slave Trigger 234,188 18 *
Infa-Red Remote Control 653,431 216 *
IR Remote Extender NEW! 144,943 3 *
IR Remote Jammer Carl 280,338 110 *
IR Remote Switch NEW! 169,206 9 *
LASER Transmitter/Receiver 432,478 92
LED Chaser 462,386 83 *
LED Metronome NEW! 111,126 3 *
LED Thermometer 217,775 22 *
Light/Dark Detector 317,272 90 *
Simple Colour Organ 148,142 11 *
Strobe Light 287,247 27 *
TRIAC Light Dimmer 569,342 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 375,079 122 *
Electromagnetic Levitator NEW! 155,655 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,389 214 *
AC Motor Speed Controller 409,698 29 *
Air Flow Detector 263,806 54 *
Digital Keypad Combination Lock 213,329 20
Low Voltage Alarm 241,654 58 *
Pine Racecar Victory Judge 112,916 1 *
Pulse Width Modulation DC Motor Control 670,860 94
Rain Detector 317,673 112 *
Simple Lie Detector 580,035 323
Simple Polarity Tester Dudley LeRoux 177,578 13 *
Simple Servo Controller 234,410 22 *
Simple Touch Switch NEW! 182,618 6 *
Simple Two Speed Contactor DC Motor Controller 218,000 21 *
Stepper Motor Controller 770,544 120 *
Time Delay Relay 570,251 88
Time Delay Relay II jawaharlal@excite.com 260,054 39 *
Touch Switch 302,864 51 *
Video Activated Relay 132,543 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 195,915 10 *
Water Detector With Sump/Bilge Pump Controller 164,831 18 *
Wire Loop Alarm Alex Meaden 216,939 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 336,782 25 *
12VDC To 120VAC Inverter 1,567,028 691
6V to 12V Converter 544,974 121
Automatic 12V Lead Acid Battery Charger 955,828 248
Automatic Load Sensing Power Switch 179,855 16 *
Car Battery Charger 899,787 159 *
Dual Polarity Power Supply 386,419 84 *
Fixed Voltage Power Supply 324,214 52 *
High Current Power Supply 356,501 66 *
High Voltage High Current Power Supply 277,500 35 *
LASER Power Supply 310,323 28
Portable CD Player Adapter For Car 224,613 12 *
Power Supply 755,384 259 *
Solid State Tesla Coil NEW! 161,962 4
Solid State Tesla Coil/High Voltage Generator 463,668 51
Transformerless Power Supply 477,600 117 *
Voltage Inverter 358,907 51 *
Voltage Inverter II 216,580 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,558 182
3 Watt FM Transmitter Rae XL Tkacik 354,367 83 *
50 Watt Amplifier 524,282 74
8 Note Tune Player 152,037 12 *
8 Watt Audio Amp 391,315 67 *
Aircraft Radio Communications Receiver 295,521 50 *
Crystal Radio 174,700 53 *
Digital Volume Control 353,711 47 *
Electronic Stethoscope 337,304 142 *
FET Audio Mixer 357,637 41
FM Transmitter 1,036,904 420
Guitar Fuzz Effect 263,530 54 *
Microphone Mixer Anatoly I. Shikhatov 263,983 26 *
Mono To Stereo Synthesizer oRbEq 147,883 18 *
One Tube Regenerative Radio NEW! 165,824 4 *
Op Amp Radio 406,706 80 *
Single Chip AM Radio NEW! 112,366 4 *
Single Chip FM Radio NEW! 188,007 1 *
Sound Level Meter 356,208 51 *
Stereo Tube Amplifier Weslee Kinsler 282,922 15 *
Tone Control 324,545 31
Transistor Organ 213,954 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,349 27 *
FM Telephone Bug 245,877 57
Phone Busy Indicator 225,481 24 *
Remote Telephone Ringer 128,833 3 *
Ringing Phone Light Flasher 233,454 35 *
Simple Phone Tap Derek Tombrello 395,444 98 *
Telephone Hold Button 139,790 10
Telephone Recorder 227,785 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.