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
Sunday, August 16, 2026		 12VDC To 120VAC Inverter43
FM Transmitter30
Yesterday
Saturday, August 15, 2026		 12VDC To 120VAC Inverter28
Solid State Tesla Coil/High Voltage Generator28
Of All Time 12VDC To 120VAC Inverter1,567,628
FM Transmitter1,037,286

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,255 61 *
Car Alarm Arming Horn Beep Canceller bob 146,779 6 *
Wireless Auto Tachometer 355,907 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 169,828 29 *
Parallel (Printer) Port Interface 302,306 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,476 63 *
3 Channel Spectrum Analyzer 236,187 20
40W Fluorescent Lamp Inverter Bart Milnes 342,220 60 *
Adjustable Strobe Light 323,360 36
Black Light 298,564 29
Colour (Sound) Organ 305,699 36
Electronic Dice NEW! 201,850 10 *
Fantastic Atom Expander 213,817 25
Flash Slave Trigger 234,394 18 *
Infa-Red Remote Control 653,688 216 *
IR Remote Extender NEW! 145,138 3 *
IR Remote Jammer Carl 280,549 110 *
IR Remote Switch NEW! 169,371 9 *
LASER Transmitter/Receiver 432,695 92
LED Chaser 462,613 83 *
LED Metronome NEW! 111,331 3 *
LED Thermometer 217,940 22 *
Light/Dark Detector 317,446 90 *
Simple Colour Organ 148,287 11 *
Strobe Light 287,421 27 *
TRIAC Light Dimmer 569,579 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 375,376 122 *
Electromagnetic Levitator NEW! 155,787 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 942,764 214 *
AC Motor Speed Controller 409,989 29 *
Air Flow Detector 264,022 54 *
Digital Keypad Combination Lock 213,489 20
Low Voltage Alarm 241,843 58 *
Pine Racecar Victory Judge 113,071 1 *
Pulse Width Modulation DC Motor Control 671,073 94
Rain Detector 317,844 112 *
Simple Lie Detector 580,234 323
Simple Polarity Tester Dudley LeRoux 177,745 13 *
Simple Servo Controller 234,621 22 *
Simple Touch Switch NEW! 182,804 6 *
Simple Two Speed Contactor DC Motor Controller 218,202 21 *
Stepper Motor Controller 770,982 120 *
Time Delay Relay 570,540 88
Time Delay Relay II jawaharlal@excite.com 260,295 39 *
Touch Switch 303,070 51 *
Video Activated Relay 132,709 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 196,172 10 *
Water Detector With Sump/Bilge Pump Controller 165,001 18 *
Wire Loop Alarm Alex Meaden 217,140 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 337,110 25 *
12VDC To 120VAC Inverter 1,567,628 691
6V to 12V Converter 545,218 121
Automatic 12V Lead Acid Battery Charger 956,106 248
Automatic Load Sensing Power Switch 180,045 16 *
Car Battery Charger 900,009 159 *
Dual Polarity Power Supply 386,638 84 *
Fixed Voltage Power Supply 324,400 52 *
High Current Power Supply 356,723 66 *
High Voltage High Current Power Supply 277,663 35 *
LASER Power Supply 310,523 28
Portable CD Player Adapter For Car 224,789 12 *
Power Supply 755,628 259 *
Solid State Tesla Coil NEW! 162,185 4
Solid State Tesla Coil/High Voltage Generator 464,002 51
Transformerless Power Supply 477,784 117 *
Voltage Inverter 359,144 51 *
Voltage Inverter II 216,771 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,732 182
3 Watt FM Transmitter Rae XL Tkacik 354,626 83 *
50 Watt Amplifier 524,509 74
8 Note Tune Player 152,172 12 *
8 Watt Audio Amp 391,578 67 *
Aircraft Radio Communications Receiver 295,772 50 *
Crystal Radio 174,965 53 *
Digital Volume Control 353,937 47 *
Electronic Stethoscope 337,515 142 *
FET Audio Mixer 357,860 41
FM Transmitter 1,037,286 420
Guitar Fuzz Effect 263,774 54 *
Microphone Mixer Anatoly I. Shikhatov 264,177 26 *
Mono To Stereo Synthesizer oRbEq 148,083 18 *
One Tube Regenerative Radio NEW! 166,126 4 *
Op Amp Radio 406,968 80 *
Single Chip AM Radio NEW! 112,559 4 *
Single Chip FM Radio NEW! 188,268 1 *
Sound Level Meter 356,419 51 *
Stereo Tube Amplifier Weslee Kinsler 283,105 15 *
Tone Control 324,815 31
Transistor Organ 214,166 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,505 27 *
FM Telephone Bug 246,052 57
Phone Busy Indicator 225,671 24 *
Remote Telephone Ringer 128,999 3 *
Ringing Phone Light Flasher 233,702 35 *
Simple Phone Tap Derek Tombrello 395,625 98 *
Telephone Hold Button 139,945 10
Telephone Recorder 227,967 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.