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, November 28, 2022
Automatic 12V Lead Acid Battery Charger253
12VDC To 120VAC Inverter225
Yesterday
Sunday, November 27, 2022
Digital Volume Control172
Car Battery Charger43
Of All Time 12VDC To 120VAC Inverter1,508,468
FM Transmitter996,433

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 223,288 61 *
Car Alarm Arming Horn Beep Canceller bob 133,212 6 *
Wireless Auto Tachometer 338,482 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 156,783 29 *
Parallel (Printer) Port Interface 280,361 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 442,281 63 *
3 Channel Spectrum Analyzer 216,861 20
40W Fluorescent Lamp Inverter Bart Milnes 326,031 60 *
Adjustable Strobe Light 304,013 36
Black Light 273,162 29
Colour (Sound) Organ 285,574 36
Electronic Dice NEW! 184,914 10 *
Fantastic Atom Expander 199,475 25
Flash Slave Trigger 216,472 18 *
Infa-Red Remote Control 629,065 216 *
IR Remote Extender NEW! 128,156 2 *
IR Remote Jammer Carl 260,735 110 *
IR Remote Switch NEW! 154,076 9 *
LASER Transmitter/Receiver 408,863 92
LED Chaser 440,186 83 *
LED Metronome NEW! 96,341 3 *
LED Thermometer 203,270 22 *
Light/Dark Detector 302,599 90 *
Simple Colour Organ 134,422 11 *
Strobe Light 271,591 27 *
TRIAC Light Dimmer 546,072 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 354,862 122 *
Electromagnetic Levitator NEW! 140,575 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 916,076 214 *
AC Motor Speed Controller 383,417 29 *
Air Flow Detector 248,035 54 *
Digital Keypad Combination Lock 193,228 20
Low Voltage Alarm 225,514 58 *
Pine Racecar Victory Judge 99,994 1 *
Pulse Width Modulation DC Motor Control 643,566 94
Rain Detector 300,896 112 *
Simple Lie Detector 555,936 323
Simple Polarity Tester Dudley LeRoux 161,616 13 *
Simple Servo Controller 217,412 22 *
Simple Touch Switch NEW! 165,968 5 *
Simple Two Speed Contactor DC Motor Controller 201,147 21 *
Stepper Motor Controller 738,656 120 *
Time Delay Relay 550,932 88
Time Delay Relay II jawaharlal@excite.com 241,726 39 *
Touch Switch 285,641 51 *
Video Activated Relay 118,493 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 176,271 10 *
Water Detector With Sump/Bilge Pump Controller 149,283 18 *
Wire Loop Alarm Alex Meaden 202,325 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 308,572 25 *
12VDC To 120VAC Inverter 1,508,468 691
6V to 12V Converter 520,571 121
Automatic 12V Lead Acid Battery Charger 930,114 248
Automatic Load Sensing Power Switch 163,325 16 *
Car Battery Charger 876,643 159 *
Dual Polarity Power Supply 366,343 84 *
Fixed Voltage Power Supply 306,573 52 *
High Current Power Supply 332,342 66 *
High Voltage High Current Power Supply 248,549 35 *
LASER Power Supply 290,927 28
Portable CD Player Adapter For Car 208,276 12 *
Power Supply 731,807 259 *
Solid State Tesla Coil NEW! 141,450 4
Solid State Tesla Coil/High Voltage Generator 437,313 51
Transformerless Power Supply 458,225 117 *
Voltage Inverter 332,660 51 *
Voltage Inverter II 197,831 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 580,393 182
3 Watt FM Transmitter Rae XL Tkacik 328,970 83 *
50 Watt Amplifier 502,016 74
8 Note Tune Player 137,515 12 *
8 Watt Audio Amp 366,829 67 *
Aircraft Radio Communications Receiver 272,382 49 *
Crystal Radio 155,116 53 *
Digital Volume Control 330,816 47 *
Electronic Stethoscope 309,539 142 *
FET Audio Mixer 338,478 41
FM Transmitter 996,433 420
Guitar Fuzz Effect 241,879 54 *
Microphone Mixer Anatoly I. Shikhatov 246,160 26 *
Mono To Stereo Synthesizer oRbEq 129,362 18 *
One Tube Regenerative Radio NEW! 133,219 4 *
Op Amp Radio 381,497 80 *
Single Chip AM Radio NEW! 96,238 2 *
Single Chip FM Radio NEW! 167,035 1 *
Sound Level Meter 337,050 51 *
Stereo Tube Amplifier Weslee Kinsler 263,709 15 *
Tone Control 305,099 31
Transistor Organ 194,617 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 160,576 27 *
FM Telephone Bug 232,517 57
Phone Busy Indicator 210,886 24 *
Remote Telephone Ringer 115,432 3 *
Ringing Phone Light Flasher 212,416 35 *
Simple Phone Tap Derek Tombrello 380,149 98 *
Telephone Hold Button 125,799 10
Telephone Recorder 213,209 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.