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, July 17, 2018
Automatic 12V Lead Acid Battery Charger6
Wireless Auto Tachometer6
Yesterday
Monday, July 16, 2018
Dual Polarity Power Supply73
Stepper Motor Controller61
Of All Time 12VDC To 120VAC Inverter1,414,786
FM Transmitter936,201

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 190,082 61 *
Car Alarm Arming Horn Beep Canceller bob 101,886 6 *
Wireless Auto Tachometer 297,745 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 133,057 29 *
Parallel (Printer) Port Interface 236,455 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 393,508 63 *
3 Channel Spectrum Analyzer 186,043 20
40W Fluorescent Lamp Inverter Bart Milnes 290,333 60 *
Adjustable Strobe Light 263,678 36
Black Light 225,496 29
Colour (Sound) Organ 247,672 36
Electronic Dice NEW! 151,397 10 *
Fantastic Atom Expander 161,785 25
Flash Slave Trigger 182,119 18 *
Infa-Red Remote Control 582,112 216 *
IR Remote Extender NEW! 92,327 2 *
IR Remote Jammer Carl 225,503 110 *
IR Remote Switch NEW! 122,359 9 *
LASER Transmitter/Receiver 363,638 92
LED Chaser 406,983 83 *
LED Metronome NEW! 81,063 3 *
LED Thermometer 176,340 22 *
Light/Dark Detector 275,654 90 *
Simple Colour Organ 111,127 10 *
Strobe Light 243,078 27 *
TRIAC Light Dimmer 456,094 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 312,293 122 *
Electromagnetic Levitator NEW! 112,821 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 858,963 214 *
AC Motor Speed Controller 339,301 29 *
Air Flow Detector 219,956 54 *
Digital Keypad Combination Lock 163,396 20
Low Voltage Alarm 193,602 58 *
Pine Racecar Victory Judge 75,565 1 *
Pulse Width Modulation DC Motor Control 610,548 93
Rain Detector 272,395 112 *
Simple Lie Detector 518,186 323
Simple Polarity Tester Dudley LeRoux 128,339 13 *
Simple Servo Controller 184,879 22 *
Simple Touch Switch NEW! 139,107 5 *
Simple Two Speed Contactor DC Motor Controller 175,759 21 *
Stepper Motor Controller 681,261 120 *
Time Delay Relay 512,815 88
Time Delay Relay II jawaharlal@excite.com 205,072 39 *
Touch Switch 256,533 51 *
Video Activated Relay 94,407 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 146,424 10 *
Water Detector With Sump/Bilge Pump Controller 119,929 18 *
Wire Loop Alarm Alex Meaden 177,783 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 268,883 25 *
12VDC To 120VAC Inverter 1,414,786 688
6V to 12V Converter 450,779 121
Automatic 12V Lead Acid Battery Charger 873,464 246
Automatic Load Sensing Power Switch 133,735 16 *
Car Battery Charger 825,300 159 *
Dual Polarity Power Supply 320,579 84 *
Fixed Voltage Power Supply 277,743 52 *
High Current Power Supply 295,233 65 *
High Voltage High Current Power Supply 221,323 35 *
LASER Power Supply 252,833 28
Portable CD Player Adapter For Car 179,451 12 *
Power Supply 687,288 259 *
Solid State Tesla Coil NEW! 118,011 4
Solid State Tesla Coil/High Voltage Generator 387,672 50
Transformerless Power Supply 418,670 117 *
Voltage Inverter 304,012 51 *
Voltage Inverter II 172,841 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 545,696 182
3 Watt FM Transmitter Rae XL Tkacik 295,700 82 *
50 Watt Amplifier 462,196 74
8 Note Tune Player 115,190 12 *
8 Watt Audio Amp 328,282 67 *
Aircraft Radio Communications Receiver 232,443 49 *
Crystal Radio 136,214 53 *
Digital Volume Control 296,232 47 *
Electronic Stethoscope 273,393 141 *
FET Audio Mixer 304,705 41
FM Transmitter 936,201 419
Guitar Fuzz Effect 205,343 52 *
Microphone Mixer Anatoly I. Shikhatov 214,593 26 *
Mono To Stereo Synthesizer oRbEq 98,184 18 *
One Tube Regenerative Radio NEW! 104,259 4 *
Op Amp Radio 344,075 80 *
Single Chip AM Radio NEW! 79,952 2 *
Single Chip FM Radio NEW! 133,047 1 *
Sound Level Meter 304,023 51 *
Stereo Tube Amplifier Weslee Kinsler 232,130 15 *
Tone Control 268,082 31
Transistor Organ 162,902 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 137,048 27 *
FM Telephone Bug 202,020 57
Phone Busy Indicator 184,047 24 *
Remote Telephone Ringer 92,999 3 *
Ringing Phone Light Flasher 181,605 34 *
Simple Phone Tap Derek Tombrello 329,270 98 *
Telephone Hold Button 97,394 10
Telephone Recorder 182,696 54 *


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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.