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, May 09, 2025		 12VDC To 120VAC Inverter65
FM Transmitter44
Yesterday
Thursday, May 08, 2025		 12VDC To 120VAC Inverter48
FM Transmitter48
Of All Time 12VDC To 120VAC Inverter1,546,451
FM Transmitter1,020,386

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,985 61 *
Car Alarm Arming Horn Beep Canceller bob 140,185 6 *
Wireless Auto Tachometer 347,763 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,548 29 *
Parallel (Printer) Port Interface 292,446 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,280 63 *
3 Channel Spectrum Analyzer 227,465 20
40W Fluorescent Lamp Inverter Bart Milnes 334,492 60 *
Adjustable Strobe Light 314,500 36
Black Light 287,997 29
Colour (Sound) Organ 296,185 36
Electronic Dice NEW! 193,657 10 *
Fantastic Atom Expander 206,855 25
Flash Slave Trigger 226,082 18 *
Infa-Red Remote Control 643,016 216 *
IR Remote Extender NEW! 137,360 3 *
IR Remote Jammer Carl 271,725 110 *
IR Remote Switch NEW! 161,660 9 *
LASER Transmitter/Receiver 423,226 92
LED Chaser 452,231 83 *
LED Metronome NEW! 103,659 3 *
LED Thermometer 211,032 22 *
Light/Dark Detector 310,243 90 *
Simple Colour Organ 141,268 11 *
Strobe Light 280,126 27 *
TRIAC Light Dimmer 559,395 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,628 122 *
Electromagnetic Levitator NEW! 148,591 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,998 214 *
AC Motor Speed Controller 399,048 29 *
Air Flow Detector 256,313 54 *
Digital Keypad Combination Lock 206,234 20
Low Voltage Alarm 233,745 58 *
Pine Racecar Victory Judge 106,452 1 *
Pulse Width Modulation DC Motor Control 661,260 94
Rain Detector 309,750 112 *
Simple Lie Detector 570,728 323
Simple Polarity Tester Dudley LeRoux 169,780 13 *
Simple Servo Controller 226,388 22 *
Simple Touch Switch NEW! 174,555 6 *
Simple Two Speed Contactor DC Motor Controller 209,889 21 *
Stepper Motor Controller 757,168 120 *
Time Delay Relay 561,492 88
Time Delay Relay II jawaharlal@excite.com 252,221 39 *
Touch Switch 294,830 51 *
Video Activated Relay 125,855 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,380 10 *
Water Detector With Sump/Bilge Pump Controller 157,393 18 *
Wire Loop Alarm Alex Meaden 209,916 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,110 25 *
12VDC To 120VAC Inverter 1,546,451 691
6V to 12V Converter 534,728 121
Automatic 12V Lead Acid Battery Charger 944,544 248
Automatic Load Sensing Power Switch 172,192 16 *
Car Battery Charger 889,865 159 *
Dual Polarity Power Supply 376,900 84 *
Fixed Voltage Power Supply 316,755 52 *
High Current Power Supply 346,575 66 *
High Voltage High Current Power Supply 269,246 35 *
LASER Power Supply 302,063 28
Portable CD Player Adapter For Car 216,848 12 *
Power Supply 745,908 259 *
Solid State Tesla Coil NEW! 152,221 4
Solid State Tesla Coil/High Voltage Generator 451,879 51
Transformerless Power Supply 469,055 117 *
Voltage Inverter 347,578 51 *
Voltage Inverter II 208,755 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,181 182
3 Watt FM Transmitter Rae XL Tkacik 343,235 83 *
50 Watt Amplifier 514,803 74
8 Note Tune Player 145,110 12 *
8 Watt Audio Amp 380,423 67 *
Aircraft Radio Communications Receiver 285,794 50 *
Crystal Radio 164,621 53 *
Digital Volume Control 344,439 47 *
Electronic Stethoscope 327,853 142 *
FET Audio Mixer 349,511 41
FM Transmitter 1,020,386 420
Guitar Fuzz Effect 253,705 54 *
Microphone Mixer Anatoly I. Shikhatov 256,021 26 *
Mono To Stereo Synthesizer oRbEq 139,454 18 *
One Tube Regenerative Radio NEW! 152,954 4 *
Op Amp Radio 396,846 80 *
Single Chip AM Radio NEW! 104,679 4 *
Single Chip FM Radio NEW! 178,660 1 *
Sound Level Meter 347,662 51 *
Stereo Tube Amplifier Weslee Kinsler 273,862 15 *
Tone Control 315,533 31
Transistor Organ 205,550 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,688 27 *
FM Telephone Bug 239,261 57
Phone Busy Indicator 218,273 24 *
Remote Telephone Ringer 122,137 3 *
Ringing Phone Light Flasher 224,202 35 *
Simple Phone Tap Derek Tombrello 388,249 98 *
Telephone Hold Button 133,229 10
Telephone Recorder 221,091 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.