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
Wednesday, November 11, 2026		 12VDC To 120VAC Inverter39
One Tube Regenerative Radio37
Yesterday
Tuesday, November 10, 2026		 12VDC To 120VAC Inverter81
Transformerless Power Supply42
Of All Time 12VDC To 120VAC Inverter1,571,446
FM Transmitter1,040,130

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,593 61 *
Car Alarm Arming Horn Beep Canceller bob 148,016 6 *
Wireless Auto Tachometer 357,457 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 171,192 29 *
Parallel (Printer) Port Interface 304,298 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 464,301 63 *
3 Channel Spectrum Analyzer 238,035 20
40W Fluorescent Lamp Inverter Bart Milnes 343,743 60 *
Adjustable Strobe Light 325,176 36
Black Light 300,599 29
Colour (Sound) Organ 307,687 36
Electronic Dice NEW! 203,536 10 *
Fantastic Atom Expander 215,365 25
Flash Slave Trigger 236,304 18 *
Infa-Red Remote Control 655,821 216 *
IR Remote Extender NEW! 146,876 3 *
IR Remote Jammer Carl 282,192 110 *
IR Remote Switch NEW! 171,042 9 *
LASER Transmitter/Receiver 434,346 92
LED Chaser 464,596 83 *
LED Metronome NEW! 112,836 3 *
LED Thermometer 219,308 22 *
Light/Dark Detector 318,952 90 *
Simple Colour Organ 149,908 11 *
Strobe Light 289,128 27 *
TRIAC Light Dimmer 571,491 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 377,247 122 *
Electromagnetic Levitator NEW! 157,183 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 945,170 214 *
AC Motor Speed Controller 411,802 29 *
Air Flow Detector 265,501 54 *
Digital Keypad Combination Lock 214,876 20
Low Voltage Alarm 243,384 58 *
Pine Racecar Victory Judge 114,627 1 *
Pulse Width Modulation DC Motor Control 673,262 94
Rain Detector 319,480 112 *
Simple Lie Detector 581,959 323
Simple Polarity Tester Dudley LeRoux 179,367 13 *
Simple Servo Controller 236,359 22 *
Simple Touch Switch NEW! 184,402 6 *
Simple Two Speed Contactor DC Motor Controller 219,847 21 *
Stepper Motor Controller 773,280 120 *
Time Delay Relay 572,488 88
Time Delay Relay II jawaharlal@excite.com 261,783 39 *
Touch Switch 304,793 51 *
Video Activated Relay 134,469 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 198,147 10 *
Water Detector With Sump/Bilge Pump Controller 166,400 18 *
Wire Loop Alarm Alex Meaden 218,758 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 339,441 25 *
12VDC To 120VAC Inverter 1,571,446 691
6V to 12V Converter 547,157 121
Automatic 12V Lead Acid Battery Charger 958,268 248
Automatic Load Sensing Power Switch 181,613 16 *
Car Battery Charger 901,802 159 *
Dual Polarity Power Supply 388,215 84 *
Fixed Voltage Power Supply 325,623 52 *
High Current Power Supply 358,256 66 *
High Voltage High Current Power Supply 278,849 35 *
LASER Power Supply 312,006 28
Portable CD Player Adapter For Car 226,196 12 *
Power Supply 757,397 259 *
Solid State Tesla Coil NEW! 163,858 4
Solid State Tesla Coil/High Voltage Generator 465,964 51
Transformerless Power Supply 479,175 117 *
Voltage Inverter 361,057 51 *
Voltage Inverter II 218,160 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 601,039 182
3 Watt FM Transmitter Rae XL Tkacik 356,279 83 *
50 Watt Amplifier 526,100 74
8 Note Tune Player 153,474 12 *
8 Watt Audio Amp 393,261 67 *
Aircraft Radio Communications Receiver 297,471 50 *
Crystal Radio 176,386 53 *
Digital Volume Control 355,469 47 *
Electronic Stethoscope 339,267 142 *
FET Audio Mixer 359,317 41
FM Transmitter 1,040,130 420
Guitar Fuzz Effect 265,361 54 *
Microphone Mixer Anatoly I. Shikhatov 265,557 26 *
Mono To Stereo Synthesizer oRbEq 149,574 18 *
One Tube Regenerative Radio NEW! 168,281 4 *
Op Amp Radio 408,818 80 *
Single Chip AM Radio NEW! 113,969 4 *
Single Chip FM Radio NEW! 190,221 1 *
Sound Level Meter 357,966 51 *
Stereo Tube Amplifier Weslee Kinsler 284,411 15 *
Tone Control 326,313 31
Transistor Organ 216,004 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,709 27 *
FM Telephone Bug 247,335 57
Phone Busy Indicator 227,007 24 *
Remote Telephone Ringer 130,154 3 *
Ringing Phone Light Flasher 235,117 35 *
Simple Phone Tap Derek Tombrello 396,871 98 *
Telephone Hold Button 141,036 10
Telephone Recorder 229,382 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.