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
Tuesday, September 15, 2026		 12VDC To 120VAC Inverter23
Stepper Motor Controller14
Yesterday
Monday, September 14, 2026		 12VDC To 120VAC Inverter39
Automatic 12V Lead Acid Battery Charger30
Of All Time 12VDC To 120VAC Inverter1,569,147
FM Transmitter1,038,370

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,797 61 *
Car Alarm Arming Horn Beep Canceller bob 147,307 6 *
Wireless Auto Tachometer 356,531 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,379 29 *
Parallel (Printer) Port Interface 303,159 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,171 63 *
3 Channel Spectrum Analyzer 236,934 20
40W Fluorescent Lamp Inverter Bart Milnes 342,818 60 *
Adjustable Strobe Light 324,076 36
Black Light 299,317 29
Colour (Sound) Organ 306,441 36
Electronic Dice NEW! 202,497 10 *
Fantastic Atom Expander 214,411 25
Flash Slave Trigger 235,146 18 *
Infa-Red Remote Control 654,558 216 *
IR Remote Extender NEW! 145,839 3 *
IR Remote Jammer Carl 281,210 110 *
IR Remote Switch NEW! 170,004 9 *
LASER Transmitter/Receiver 433,338 92
LED Chaser 463,466 83 *
LED Metronome NEW! 111,935 3 *
LED Thermometer 218,509 22 *
Light/Dark Detector 318,068 90 *
Simple Colour Organ 148,969 11 *
Strobe Light 288,074 27 *
TRIAC Light Dimmer 570,353 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,068 122 *
Electromagnetic Levitator NEW! 156,331 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 943,672 214 *
AC Motor Speed Controller 410,711 29 *
Air Flow Detector 264,634 54 *
Digital Keypad Combination Lock 214,063 20
Low Voltage Alarm 242,469 58 *
Pine Racecar Victory Judge 113,677 1 *
Pulse Width Modulation DC Motor Control 671,888 94
Rain Detector 318,476 112 *
Simple Lie Detector 580,879 323
Simple Polarity Tester Dudley LeRoux 178,393 13 *
Simple Servo Controller 235,343 22 *
Simple Touch Switch NEW! 183,422 6 *
Simple Two Speed Contactor DC Motor Controller 218,818 21 *
Stepper Motor Controller 771,954 120 *
Time Delay Relay 571,342 88
Time Delay Relay II jawaharlal@excite.com 260,891 39 *
Touch Switch 303,719 51 *
Video Activated Relay 133,363 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 196,892 10 *
Water Detector With Sump/Bilge Pump Controller 165,567 18 *
Wire Loop Alarm Alex Meaden 217,766 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 338,178 25 *
12VDC To 120VAC Inverter 1,569,147 691
6V to 12V Converter 545,992 121
Automatic 12V Lead Acid Battery Charger 956,953 248
Automatic Load Sensing Power Switch 180,706 16 *
Car Battery Charger 900,732 159 *
Dual Polarity Power Supply 387,234 84 *
Fixed Voltage Power Supply 324,782 52 *
High Current Power Supply 357,213 66 *
High Voltage High Current Power Supply 278,037 35 *
LASER Power Supply 310,944 28
Portable CD Player Adapter For Car 225,204 12 *
Power Supply 756,149 259 *
Solid State Tesla Coil NEW! 162,746 4
Solid State Tesla Coil/High Voltage Generator 464,690 51
Transformerless Power Supply 478,191 117 *
Voltage Inverter 359,768 51 *
Voltage Inverter II 217,176 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,146 182
3 Watt FM Transmitter Rae XL Tkacik 355,168 83 *
50 Watt Amplifier 525,001 74
8 Note Tune Player 152,618 12 *
8 Watt Audio Amp 392,141 67 *
Aircraft Radio Communications Receiver 296,312 50 *
Crystal Radio 175,420 53 *
Digital Volume Control 354,410 47 *
Electronic Stethoscope 338,204 142 *
FET Audio Mixer 358,270 41
FM Transmitter 1,038,370 420
Guitar Fuzz Effect 264,238 54 *
Microphone Mixer Anatoly I. Shikhatov 264,601 26 *
Mono To Stereo Synthesizer oRbEq 148,478 18 *
One Tube Regenerative Radio NEW! 166,709 4 *
Op Amp Radio 407,495 80 *
Single Chip AM Radio NEW! 112,998 4 *
Single Chip FM Radio NEW! 188,930 1 *
Sound Level Meter 356,856 51 *
Stereo Tube Amplifier Weslee Kinsler 283,484 15 *
Tone Control 325,283 31
Transistor Organ 214,638 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,883 27 *
FM Telephone Bug 246,424 57
Phone Busy Indicator 226,079 24 *
Remote Telephone Ringer 129,323 3 *
Ringing Phone Light Flasher 234,132 35 *
Simple Phone Tap Derek Tombrello 396,008 98 *
Telephone Hold Button 140,272 10
Telephone Recorder 228,441 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.