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		 12VDC To 120VAC Inverter21
6V to 12V Converter20
Yesterday
Monday, June 08, 2026		 Voltage Inverter45
12VDC To 120VAC Inverter45
Of All Time 12VDC To 120VAC Inverter1,564,744
FM Transmitter1,035,707

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 237,388 61 *
Car Alarm Arming Horn Beep Canceller bob 145,987 6 *
Wireless Auto Tachometer 354,954 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 168,980 29 *
Parallel (Printer) Port Interface 301,073 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 461,172 63 *
3 Channel Spectrum Analyzer 235,102 20
40W Fluorescent Lamp Inverter Bart Milnes 341,370 60 *
Adjustable Strobe Light 322,296 36
Black Light 297,256 29
Colour (Sound) Organ 304,523 36
Electronic Dice NEW! 200,841 10 *
Fantastic Atom Expander 212,930 25
Flash Slave Trigger 233,241 18 *
Infa-Red Remote Control 652,214 216 *
IR Remote Extender NEW! 144,193 3 *
IR Remote Jammer Carl 279,256 110 *
IR Remote Switch NEW! 168,469 9 *
LASER Transmitter/Receiver 431,584 92
LED Chaser 461,137 83 *
LED Metronome NEW! 110,327 3 *
LED Thermometer 217,064 22 *
Light/Dark Detector 316,599 90 *
Simple Colour Organ 147,441 11 *
Strobe Light 286,468 27 *
TRIAC Light Dimmer 567,947 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 373,990 122 *
Electromagnetic Levitator NEW! 154,938 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 941,163 214 *
AC Motor Speed Controller 408,752 29 *
Air Flow Detector 262,984 54 *
Digital Keypad Combination Lock 212,619 20
Low Voltage Alarm 240,804 58 *
Pine Racecar Victory Judge 112,206 1 *
Pulse Width Modulation DC Motor Control 669,920 94
Rain Detector 316,700 112 *
Simple Lie Detector 579,152 323
Simple Polarity Tester Dudley LeRoux 176,819 13 *
Simple Servo Controller 233,600 22 *
Simple Touch Switch NEW! 181,778 6 *
Simple Two Speed Contactor DC Motor Controller 217,099 21 *
Stepper Motor Controller 769,466 120 *
Time Delay Relay 569,362 88
Time Delay Relay II jawaharlal@excite.com 259,307 39 *
Touch Switch 301,970 51 *
Video Activated Relay 131,789 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 194,302 10 *
Water Detector With Sump/Bilge Pump Controller 164,053 18 *
Wire Loop Alarm Alex Meaden 216,179 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 335,654 25 *
12VDC To 120VAC Inverter 1,564,744 691
6V to 12V Converter 543,785 121
Automatic 12V Lead Acid Battery Charger 954,532 248
Automatic Load Sensing Power Switch 179,080 16 *
Car Battery Charger 898,885 159 *
Dual Polarity Power Supply 385,547 84 *
Fixed Voltage Power Supply 323,516 52 *
High Current Power Supply 355,584 66 *
High Voltage High Current Power Supply 276,727 35 *
LASER Power Supply 309,304 28
Portable CD Player Adapter For Car 223,637 12 *
Power Supply 754,333 259 *
Solid State Tesla Coil NEW! 161,102 4
Solid State Tesla Coil/High Voltage Generator 462,178 51
Transformerless Power Supply 476,743 117 *
Voltage Inverter 357,808 51 *
Voltage Inverter II 215,761 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 598,743 182
3 Watt FM Transmitter Rae XL Tkacik 353,094 83 *
50 Watt Amplifier 523,473 74
8 Note Tune Player 151,340 12 *
8 Watt Audio Amp 390,197 67 *
Aircraft Radio Communications Receiver 294,630 50 *
Crystal Radio 173,735 53 *
Digital Volume Control 352,834 47 *
Electronic Stethoscope 336,444 142 *
FET Audio Mixer 356,778 41
FM Transmitter 1,035,707 420
Guitar Fuzz Effect 262,508 54 *
Microphone Mixer Anatoly I. Shikhatov 263,216 26 *
Mono To Stereo Synthesizer oRbEq 147,055 18 *
One Tube Regenerative Radio NEW! 164,753 4 *
Op Amp Radio 405,737 80 *
Single Chip AM Radio NEW! 111,446 4 *
Single Chip FM Radio NEW! 187,033 1 *
Sound Level Meter 355,351 51 *
Stereo Tube Amplifier Weslee Kinsler 282,111 15 *
Tone Control 323,720 31
Transistor Organ 213,105 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 173,594 27 *
FM Telephone Bug 245,106 57
Phone Busy Indicator 224,666 24 *
Remote Telephone Ringer 128,109 3 *
Ringing Phone Light Flasher 232,407 35 *
Simple Phone Tap Derek Tombrello 394,723 98 *
Telephone Hold Button 139,153 10
Telephone Recorder 227,013 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.