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
Friday, February 07, 2025		 12VDC To 120VAC Inverter29
Stepper Motor Controller28
Yesterday
Thursday, February 06, 2025		 12VDC To 120VAC Inverter29
3 Watt FM Transmitter29
Of All Time 12VDC To 120VAC Inverter1,542,634
FM Transmitter1,017,924

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,022 61 *
Car Alarm Arming Horn Beep Canceller bob 139,377 6 *
Wireless Auto Tachometer 346,655 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,684 29 *
Parallel (Printer) Port Interface 291,053 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,012 63 *
3 Channel Spectrum Analyzer 226,092 20
40W Fluorescent Lamp Inverter Bart Milnes 333,455 60 *
Adjustable Strobe Light 313,222 36
Black Light 286,327 29
Colour (Sound) Organ 294,904 36
Electronic Dice NEW! 192,545 10 *
Fantastic Atom Expander 205,951 25
Flash Slave Trigger 224,982 18 *
Infa-Red Remote Control 641,631 216 *
IR Remote Extender NEW! 136,249 3 *
IR Remote Jammer Carl 270,372 110 *
IR Remote Switch NEW! 160,618 9 *
LASER Transmitter/Receiver 421,811 92
LED Chaser 450,868 83 *
LED Metronome NEW! 102,648 3 *
LED Thermometer 210,060 22 *
Light/Dark Detector 309,215 90 *
Simple Colour Organ 140,363 11 *
Strobe Light 279,093 27 *
TRIAC Light Dimmer 558,047 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,354 122 *
Electromagnetic Levitator NEW! 147,607 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,120 214 *
AC Motor Speed Controller 397,393 29 *
Air Flow Detector 255,264 54 *
Digital Keypad Combination Lock 205,282 20
Low Voltage Alarm 232,696 58 *
Pine Racecar Victory Judge 105,571 1 *
Pulse Width Modulation DC Motor Control 659,824 94
Rain Detector 308,560 112 *
Simple Lie Detector 569,326 323
Simple Polarity Tester Dudley LeRoux 168,795 13 *
Simple Servo Controller 225,190 22 *
Simple Touch Switch NEW! 173,441 6 *
Simple Two Speed Contactor DC Motor Controller 208,769 21 *
Stepper Motor Controller 754,669 120 *
Time Delay Relay 560,097 88
Time Delay Relay II jawaharlal@excite.com 251,176 39 *
Touch Switch 293,626 51 *
Video Activated Relay 124,962 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,307 10 *
Water Detector With Sump/Bilge Pump Controller 156,456 18 *
Wire Loop Alarm Alex Meaden 208,945 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 322,292 25 *
12VDC To 120VAC Inverter 1,542,634 691
6V to 12V Converter 533,091 121
Automatic 12V Lead Acid Battery Charger 942,919 248
Automatic Load Sensing Power Switch 171,133 16 *
Car Battery Charger 888,388 159 *
Dual Polarity Power Supply 375,627 84 *
Fixed Voltage Power Supply 315,672 52 *
High Current Power Supply 345,087 66 *
High Voltage High Current Power Supply 268,052 35 *
LASER Power Supply 300,782 28
Portable CD Player Adapter For Car 215,829 12 *
Power Supply 744,412 259 *
Solid State Tesla Coil NEW! 150,898 4
Solid State Tesla Coil/High Voltage Generator 450,178 51
Transformerless Power Supply 467,765 117 *
Voltage Inverter 345,639 51 *
Voltage Inverter II 207,535 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,937 182
3 Watt FM Transmitter Rae XL Tkacik 341,448 83 *
50 Watt Amplifier 513,415 74
8 Note Tune Player 144,152 12 *
8 Watt Audio Amp 378,967 67 *
Aircraft Radio Communications Receiver 284,218 50 *
Crystal Radio 163,168 53 *
Digital Volume Control 343,222 47 *
Electronic Stethoscope 326,502 142 *
FET Audio Mixer 348,113 41
FM Transmitter 1,017,924 420
Guitar Fuzz Effect 252,179 54 *
Microphone Mixer Anatoly I. Shikhatov 254,842 26 *
Mono To Stereo Synthesizer oRbEq 138,284 18 *
One Tube Regenerative Radio NEW! 150,589 4 *
Op Amp Radio 395,216 80 *
Single Chip AM Radio NEW! 103,593 4 *
Single Chip FM Radio NEW! 177,202 1 *
Sound Level Meter 346,356 51 *
Stereo Tube Amplifier Weslee Kinsler 272,584 15 *
Tone Control 314,287 31
Transistor Organ 204,217 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,787 27 *
FM Telephone Bug 238,331 57
Phone Busy Indicator 217,236 24 *
Remote Telephone Ringer 121,306 3 *
Ringing Phone Light Flasher 222,915 35 *
Simple Phone Tap Derek Tombrello 387,172 98 *
Telephone Hold Button 132,299 10
Telephone Recorder 220,123 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.