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, June 09, 2026		 6V to 12V Converter16
IR Remote Switch13
Yesterday
Monday, June 08, 2026		 Voltage Inverter45
12VDC To 120VAC Inverter45
Of All Time 12VDC To 120VAC Inverter1,564,735
FM Transmitter1,035,702

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,383 61 *
Car Alarm Arming Horn Beep Canceller bob 145,983 6 *
Wireless Auto Tachometer 354,949 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 168,976 29 *
Parallel (Printer) Port Interface 301,069 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,166 63 *
3 Channel Spectrum Analyzer 235,100 20
40W Fluorescent Lamp Inverter Bart Milnes 341,365 60 *
Adjustable Strobe Light 322,293 36
Black Light 297,251 29
Colour (Sound) Organ 304,519 36
Electronic Dice NEW! 200,839 10 *
Fantastic Atom Expander 212,927 25
Flash Slave Trigger 233,239 18 *
Infa-Red Remote Control 652,211 216 *
IR Remote Extender NEW! 144,188 3 *
IR Remote Jammer Carl 279,254 110 *
IR Remote Switch NEW! 168,464 9 *
LASER Transmitter/Receiver 431,577 92
LED Chaser 461,134 83 *
LED Metronome NEW! 110,321 3 *
LED Thermometer 217,061 22 *
Light/Dark Detector 316,595 90 *
Simple Colour Organ 147,438 11 *
Strobe Light 286,463 27 *
TRIAC Light Dimmer 567,938 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 373,988 122 *
Electromagnetic Levitator NEW! 154,938 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,158 214 *
AC Motor Speed Controller 408,747 29 *
Air Flow Detector 262,979 54 *
Digital Keypad Combination Lock 212,614 20
Low Voltage Alarm 240,798 58 *
Pine Racecar Victory Judge 112,203 1 *
Pulse Width Modulation DC Motor Control 669,918 94
Rain Detector 316,696 112 *
Simple Lie Detector 579,148 323
Simple Polarity Tester Dudley LeRoux 176,815 13 *
Simple Servo Controller 233,598 22 *
Simple Touch Switch NEW! 181,775 6 *
Simple Two Speed Contactor DC Motor Controller 217,092 21 *
Stepper Motor Controller 769,459 120 *
Time Delay Relay 569,357 88
Time Delay Relay II jawaharlal@excite.com 259,303 39 *
Touch Switch 301,967 51 *
Video Activated Relay 131,782 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,295 10 *
Water Detector With Sump/Bilge Pump Controller 164,048 18 *
Wire Loop Alarm Alex Meaden 216,173 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,650 25 *
12VDC To 120VAC Inverter 1,564,735 691
6V to 12V Converter 543,781 121
Automatic 12V Lead Acid Battery Charger 954,525 248
Automatic Load Sensing Power Switch 179,078 16 *
Car Battery Charger 898,882 159 *
Dual Polarity Power Supply 385,544 84 *
Fixed Voltage Power Supply 323,512 52 *
High Current Power Supply 355,579 66 *
High Voltage High Current Power Supply 276,724 35 *
LASER Power Supply 309,298 28
Portable CD Player Adapter For Car 223,632 12 *
Power Supply 754,325 259 *
Solid State Tesla Coil NEW! 161,100 4
Solid State Tesla Coil/High Voltage Generator 462,172 51
Transformerless Power Supply 476,736 117 *
Voltage Inverter 357,804 51 *
Voltage Inverter II 215,756 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,739 182
3 Watt FM Transmitter Rae XL Tkacik 353,090 83 *
50 Watt Amplifier 523,470 74
8 Note Tune Player 151,336 12 *
8 Watt Audio Amp 390,193 67 *
Aircraft Radio Communications Receiver 294,625 50 *
Crystal Radio 173,731 53 *
Digital Volume Control 352,831 47 *
Electronic Stethoscope 336,442 142 *
FET Audio Mixer 356,775 41
FM Transmitter 1,035,702 420
Guitar Fuzz Effect 262,500 54 *
Microphone Mixer Anatoly I. Shikhatov 263,214 26 *
Mono To Stereo Synthesizer oRbEq 147,052 18 *
One Tube Regenerative Radio NEW! 164,748 4 *
Op Amp Radio 405,733 80 *
Single Chip AM Radio NEW! 111,444 4 *
Single Chip FM Radio NEW! 187,031 1 *
Sound Level Meter 355,347 51 *
Stereo Tube Amplifier Weslee Kinsler 282,108 15 *
Tone Control 323,715 31
Transistor Organ 213,102 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,590 27 *
FM Telephone Bug 245,103 57
Phone Busy Indicator 224,663 24 *
Remote Telephone Ringer 128,105 3 *
Ringing Phone Light Flasher 232,402 35 *
Simple Phone Tap Derek Tombrello 394,720 98 *
Telephone Hold Button 139,149 10
Telephone Recorder 227,011 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.