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		 22 Watt Audio Amplifier12
One Tube Regenerative Radio11
Yesterday
Sunday, January 19, 2025		 Stepper Motor Controller28
One Tube Regenerative Radio27
Of All Time 12VDC To 120VAC Inverter1,541,973
FM Transmitter1,017,447

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 229,865 61 *
Car Alarm Arming Horn Beep Canceller bob 139,240 6 *
Wireless Auto Tachometer 346,489 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,550 29 *
Parallel (Printer) Port Interface 290,829 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 451,777 63 *
3 Channel Spectrum Analyzer 225,856 20
40W Fluorescent Lamp Inverter Bart Milnes 333,283 60 *
Adjustable Strobe Light 313,042 36
Black Light 286,022 29
Colour (Sound) Organ 294,693 36
Electronic Dice NEW! 192,373 10 *
Fantastic Atom Expander 205,806 25
Flash Slave Trigger 224,814 18 *
Infa-Red Remote Control 641,402 216 *
IR Remote Extender NEW! 136,055 3 *
IR Remote Jammer Carl 270,140 110 *
IR Remote Switch NEW! 160,458 9 *
LASER Transmitter/Receiver 421,582 92
LED Chaser 450,608 83 *
LED Metronome NEW! 102,497 3 *
LED Thermometer 209,907 22 *
Light/Dark Detector 309,067 90 *
Simple Colour Organ 140,227 11 *
Strobe Light 278,934 27 *
TRIAC Light Dimmer 557,783 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,158 122 *
Electromagnetic Levitator NEW! 147,411 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 927,841 214 *
AC Motor Speed Controller 397,078 29 *
Air Flow Detector 255,082 54 *
Digital Keypad Combination Lock 205,130 20
Low Voltage Alarm 232,521 58 *
Pine Racecar Victory Judge 105,423 1 *
Pulse Width Modulation DC Motor Control 659,571 94
Rain Detector 308,364 112 *
Simple Lie Detector 569,103 323
Simple Polarity Tester Dudley LeRoux 168,633 13 *
Simple Servo Controller 224,990 22 *
Simple Touch Switch NEW! 173,244 6 *
Simple Two Speed Contactor DC Motor Controller 208,595 21 *
Stepper Motor Controller 754,146 120 *
Time Delay Relay 559,868 88
Time Delay Relay II jawaharlal@excite.com 250,997 39 *
Touch Switch 293,439 51 *
Video Activated Relay 124,804 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,090 10 *
Water Detector With Sump/Bilge Pump Controller 156,268 18 *
Wire Loop Alarm Alex Meaden 208,794 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 321,868 25 *
12VDC To 120VAC Inverter 1,541,973 691
6V to 12V Converter 532,824 121
Automatic 12V Lead Acid Battery Charger 942,585 248
Automatic Load Sensing Power Switch 170,972 16 *
Car Battery Charger 888,123 159 *
Dual Polarity Power Supply 375,416 84 *
Fixed Voltage Power Supply 315,475 52 *
High Current Power Supply 344,755 66 *
High Voltage High Current Power Supply 267,875 35 *
LASER Power Supply 300,559 28
Portable CD Player Adapter For Car 215,646 12 *
Power Supply 744,142 259 *
Solid State Tesla Coil NEW! 150,646 4
Solid State Tesla Coil/High Voltage Generator 449,886 51
Transformerless Power Supply 467,564 117 *
Voltage Inverter 345,288 51 *
Voltage Inverter II 207,306 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,718 182
3 Watt FM Transmitter Rae XL Tkacik 341,098 83 *
50 Watt Amplifier 513,115 74
8 Note Tune Player 143,995 12 *
8 Watt Audio Amp 378,719 67 *
Aircraft Radio Communications Receiver 283,943 49 *
Crystal Radio 162,925 53 *
Digital Volume Control 342,989 47 *
Electronic Stethoscope 326,219 142 *
FET Audio Mixer 347,887 41
FM Transmitter 1,017,447 420
Guitar Fuzz Effect 251,922 54 *
Microphone Mixer Anatoly I. Shikhatov 254,659 26 *
Mono To Stereo Synthesizer oRbEq 138,083 18 *
One Tube Regenerative Radio NEW! 150,059 4 *
Op Amp Radio 394,917 80 *
Single Chip AM Radio NEW! 103,396 3 *
Single Chip FM Radio NEW! 176,926 1 *
Sound Level Meter 346,083 51 *
Stereo Tube Amplifier Weslee Kinsler 272,384 15 *
Tone Control 314,072 31
Transistor Organ 204,011 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,634 27 *
FM Telephone Bug 238,183 57
Phone Busy Indicator 217,072 24 *
Remote Telephone Ringer 121,170 3 *
Ringing Phone Light Flasher 222,688 35 *
Simple Phone Tap Derek Tombrello 386,988 98 *
Telephone Hold Button 132,142 10
Telephone Recorder 219,940 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.