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
Monday, January 20, 2025		 12VDC To 120VAC Inverter28
One Tube Regenerative Radio24
Yesterday
Sunday, January 19, 2025		 Stepper Motor Controller28
One Tube Regenerative Radio27
Of All Time 12VDC To 120VAC Inverter1,541,996
FM Transmitter1,017,457

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 229,870 61 *
Car Alarm Arming Horn Beep Canceller bob 139,245 6 *
Wireless Auto Tachometer 346,493 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,552 29 *
Parallel (Printer) Port Interface 290,833 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 451,783 63 *
3 Channel Spectrum Analyzer 225,863 20
40W Fluorescent Lamp Inverter Bart Milnes 333,285 60 *
Adjustable Strobe Light 313,046 36
Black Light 286,029 29
Colour (Sound) Organ 294,706 36
Electronic Dice NEW! 192,379 10 *
Fantastic Atom Expander 205,809 25
Flash Slave Trigger 224,820 18 *
Infa-Red Remote Control 641,406 216 *
IR Remote Extender NEW! 136,057 3 *
IR Remote Jammer Carl 270,144 110 *
IR Remote Switch NEW! 160,461 9 *
LASER Transmitter/Receiver 421,588 92
LED Chaser 450,617 83 *
LED Metronome NEW! 102,500 3 *
LED Thermometer 209,909 22 *
Light/Dark Detector 309,072 90 *
Simple Colour Organ 140,232 11 *
Strobe Light 278,937 27 *
TRIAC Light Dimmer 557,791 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,164 122 *
Electromagnetic Levitator NEW! 147,414 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 927,851 214 *
AC Motor Speed Controller 397,084 29 *
Air Flow Detector 255,088 54 *
Digital Keypad Combination Lock 205,136 20
Low Voltage Alarm 232,526 58 *
Pine Racecar Victory Judge 105,426 1 *
Pulse Width Modulation DC Motor Control 659,577 94
Rain Detector 308,369 112 *
Simple Lie Detector 569,109 323
Simple Polarity Tester Dudley LeRoux 168,637 13 *
Simple Servo Controller 224,996 22 *
Simple Touch Switch NEW! 173,253 6 *
Simple Two Speed Contactor DC Motor Controller 208,601 21 *
Stepper Motor Controller 754,158 120 *
Time Delay Relay 559,873 88
Time Delay Relay II jawaharlal@excite.com 251,003 39 *
Touch Switch 293,444 51 *
Video Activated Relay 124,806 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,092 10 *
Water Detector With Sump/Bilge Pump Controller 156,275 18 *
Wire Loop Alarm Alex Meaden 208,797 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 321,882 25 *
12VDC To 120VAC Inverter 1,541,996 691
6V to 12V Converter 532,828 121
Automatic 12V Lead Acid Battery Charger 942,590 248
Automatic Load Sensing Power Switch 170,976 16 *
Car Battery Charger 888,130 159 *
Dual Polarity Power Supply 375,420 84 *
Fixed Voltage Power Supply 315,479 52 *
High Current Power Supply 344,768 66 *
High Voltage High Current Power Supply 267,879 35 *
LASER Power Supply 300,563 28
Portable CD Player Adapter For Car 215,651 12 *
Power Supply 744,148 259 *
Solid State Tesla Coil NEW! 150,649 4
Solid State Tesla Coil/High Voltage Generator 449,893 51
Transformerless Power Supply 467,568 117 *
Voltage Inverter 345,297 51 *
Voltage Inverter II 207,312 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,720 182
3 Watt FM Transmitter Rae XL Tkacik 341,100 83 *
50 Watt Amplifier 513,123 74
8 Note Tune Player 144,000 12 *
8 Watt Audio Amp 378,725 67 *
Aircraft Radio Communications Receiver 283,948 49 *
Crystal Radio 162,930 53 *
Digital Volume Control 342,993 47 *
Electronic Stethoscope 326,238 142 *
FET Audio Mixer 347,895 41
FM Transmitter 1,017,457 420
Guitar Fuzz Effect 251,927 54 *
Microphone Mixer Anatoly I. Shikhatov 254,663 26 *
Mono To Stereo Synthesizer oRbEq 138,086 18 *
One Tube Regenerative Radio NEW! 150,072 4 *
Op Amp Radio 394,927 80 *
Single Chip AM Radio NEW! 103,402 3 *
Single Chip FM Radio NEW! 176,933 1 *
Sound Level Meter 346,087 51 *
Stereo Tube Amplifier Weslee Kinsler 272,387 15 *
Tone Control 314,076 31
Transistor Organ 204,018 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,638 27 *
FM Telephone Bug 238,187 57
Phone Busy Indicator 217,078 24 *
Remote Telephone Ringer 121,173 3 *
Ringing Phone Light Flasher 222,691 35 *
Simple Phone Tap Derek Tombrello 386,991 98 *
Telephone Hold Button 132,149 10
Telephone Recorder 219,944 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.