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, May 19, 2025		 12VDC To 120VAC Inverter18
One Tube Regenerative Radio18
Yesterday
Sunday, May 18, 2025		 12VDC To 120VAC Inverter38
FM Transmitter31
Of All Time 12VDC To 120VAC Inverter1,546,826
FM Transmitter1,020,739

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,074 61 *
Car Alarm Arming Horn Beep Canceller bob 140,257 6 *
Wireless Auto Tachometer 347,880 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,629 29 *
Parallel (Printer) Port Interface 292,582 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,386 63 *
3 Channel Spectrum Analyzer 227,598 20
40W Fluorescent Lamp Inverter Bart Milnes 334,587 60 *
Adjustable Strobe Light 314,619 36
Black Light 288,183 29
Colour (Sound) Organ 296,286 36
Electronic Dice NEW! 193,769 10 *
Fantastic Atom Expander 206,936 25
Flash Slave Trigger 226,191 18 *
Infa-Red Remote Control 643,169 216 *
IR Remote Extender NEW! 137,458 3 *
IR Remote Jammer Carl 271,838 110 *
IR Remote Switch NEW! 161,751 9 *
LASER Transmitter/Receiver 423,377 92
LED Chaser 452,383 83 *
LED Metronome NEW! 103,759 3 *
LED Thermometer 211,111 22 *
Light/Dark Detector 310,337 90 *
Simple Colour Organ 141,351 11 *
Strobe Light 280,224 27 *
TRIAC Light Dimmer 559,520 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,748 122 *
Electromagnetic Levitator NEW! 148,706 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,246 214 *
AC Motor Speed Controller 399,229 29 *
Air Flow Detector 256,408 54 *
Digital Keypad Combination Lock 206,325 20
Low Voltage Alarm 233,848 58 *
Pine Racecar Victory Judge 106,542 1 *
Pulse Width Modulation DC Motor Control 661,394 94
Rain Detector 309,874 112 *
Simple Lie Detector 570,852 323
Simple Polarity Tester Dudley LeRoux 169,900 13 *
Simple Servo Controller 226,504 22 *
Simple Touch Switch NEW! 174,682 6 *
Simple Two Speed Contactor DC Motor Controller 210,006 21 *
Stepper Motor Controller 757,439 120 *
Time Delay Relay 561,647 88
Time Delay Relay II jawaharlal@excite.com 252,332 39 *
Touch Switch 294,943 51 *
Video Activated Relay 125,950 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,485 10 *
Water Detector With Sump/Bilge Pump Controller 157,478 18 *
Wire Loop Alarm Alex Meaden 210,016 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,318 25 *
12VDC To 120VAC Inverter 1,546,826 691
6V to 12V Converter 534,870 121
Automatic 12V Lead Acid Battery Charger 944,710 248
Automatic Load Sensing Power Switch 172,291 16 *
Car Battery Charger 890,015 159 *
Dual Polarity Power Supply 377,051 84 *
Fixed Voltage Power Supply 316,863 52 *
High Current Power Supply 346,771 66 *
High Voltage High Current Power Supply 269,371 35 *
LASER Power Supply 302,175 28
Portable CD Player Adapter For Car 216,971 12 *
Power Supply 746,087 259 *
Solid State Tesla Coil NEW! 152,357 4
Solid State Tesla Coil/High Voltage Generator 452,058 51
Transformerless Power Supply 469,194 117 *
Voltage Inverter 347,780 51 *
Voltage Inverter II 208,873 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,298 182
3 Watt FM Transmitter Rae XL Tkacik 343,407 83 *
50 Watt Amplifier 514,967 74
8 Note Tune Player 145,230 12 *
8 Watt Audio Amp 380,597 67 *
Aircraft Radio Communications Receiver 285,964 50 *
Crystal Radio 164,747 53 *
Digital Volume Control 344,847 47 *
Electronic Stethoscope 327,994 142 *
FET Audio Mixer 349,666 41
FM Transmitter 1,020,739 420
Guitar Fuzz Effect 253,864 54 *
Microphone Mixer Anatoly I. Shikhatov 256,140 26 *
Mono To Stereo Synthesizer oRbEq 139,578 18 *
One Tube Regenerative Radio NEW! 153,192 4 *
Op Amp Radio 397,032 80 *
Single Chip AM Radio NEW! 104,785 4 *
Single Chip FM Radio NEW! 178,794 1 *
Sound Level Meter 347,799 51 *
Stereo Tube Amplifier Weslee Kinsler 273,968 15 *
Tone Control 315,657 31
Transistor Organ 205,659 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,778 27 *
FM Telephone Bug 239,344 57
Phone Busy Indicator 218,377 24 *
Remote Telephone Ringer 122,237 3 *
Ringing Phone Light Flasher 224,353 35 *
Simple Phone Tap Derek Tombrello 388,350 98 *
Telephone Hold Button 133,334 10
Telephone Recorder 221,194 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.