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
Thursday, November 12, 2026		 Stepper Motor Controller19
Infa-Red Remote Control18
Yesterday
Wednesday, November 11, 2026		 12VDC To 120VAC Inverter46
One Tube Regenerative Radio37
Of All Time 12VDC To 120VAC Inverter1,571,465
FM Transmitter1,040,142

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,598 61 *
Car Alarm Arming Horn Beep Canceller bob 148,023 6 *
Wireless Auto Tachometer 357,467 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 171,199 29 *
Parallel (Printer) Port Interface 304,310 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 464,309 63 *
3 Channel Spectrum Analyzer 238,042 20
40W Fluorescent Lamp Inverter Bart Milnes 343,748 60 *
Adjustable Strobe Light 325,182 36
Black Light 300,607 29
Colour (Sound) Organ 307,695 36
Electronic Dice NEW! 203,544 10 *
Fantastic Atom Expander 215,373 25
Flash Slave Trigger 236,317 18 *
Infa-Red Remote Control 655,839 216 *
IR Remote Extender NEW! 146,883 3 *
IR Remote Jammer Carl 282,202 110 *
IR Remote Switch NEW! 171,051 9 *
LASER Transmitter/Receiver 434,351 92
LED Chaser 464,603 83 *
LED Metronome NEW! 112,842 3 *
LED Thermometer 219,316 22 *
Light/Dark Detector 318,957 90 *
Simple Colour Organ 149,914 11 *
Strobe Light 289,136 27 *
TRIAC Light Dimmer 571,499 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 377,257 122 *
Electromagnetic Levitator NEW! 157,186 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 945,184 214 *
AC Motor Speed Controller 411,809 29 *
Air Flow Detector 265,506 54 *
Digital Keypad Combination Lock 214,885 20
Low Voltage Alarm 243,396 58 *
Pine Racecar Victory Judge 114,636 1 *
Pulse Width Modulation DC Motor Control 673,267 94
Rain Detector 319,485 112 *
Simple Lie Detector 581,968 323
Simple Polarity Tester Dudley LeRoux 179,374 13 *
Simple Servo Controller 236,371 22 *
Simple Touch Switch NEW! 184,410 6 *
Simple Two Speed Contactor DC Motor Controller 219,857 21 *
Stepper Motor Controller 773,301 120 *
Time Delay Relay 572,496 88
Time Delay Relay II jawaharlal@excite.com 261,793 39 *
Touch Switch 304,801 51 *
Video Activated Relay 134,477 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 198,157 10 *
Water Detector With Sump/Bilge Pump Controller 166,406 18 *
Wire Loop Alarm Alex Meaden 218,764 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 339,459 25 *
12VDC To 120VAC Inverter 1,571,465 691
6V to 12V Converter 547,161 121
Automatic 12V Lead Acid Battery Charger 958,274 248
Automatic Load Sensing Power Switch 181,620 16 *
Car Battery Charger 901,807 159 *
Dual Polarity Power Supply 388,225 84 *
Fixed Voltage Power Supply 325,629 52 *
High Current Power Supply 358,261 66 *
High Voltage High Current Power Supply 278,856 35 *
LASER Power Supply 312,012 28
Portable CD Player Adapter For Car 226,211 12 *
Power Supply 757,411 259 *
Solid State Tesla Coil NEW! 163,867 4
Solid State Tesla Coil/High Voltage Generator 465,969 51
Transformerless Power Supply 479,186 117 *
Voltage Inverter 361,063 51 *
Voltage Inverter II 218,167 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 601,049 182
3 Watt FM Transmitter Rae XL Tkacik 356,288 83 *
50 Watt Amplifier 526,112 74
8 Note Tune Player 153,485 12 *
8 Watt Audio Amp 393,273 67 *
Aircraft Radio Communications Receiver 297,485 50 *
Crystal Radio 176,393 53 *
Digital Volume Control 355,479 47 *
Electronic Stethoscope 339,273 142 *
FET Audio Mixer 359,327 41
FM Transmitter 1,040,142 420
Guitar Fuzz Effect 265,368 54 *
Microphone Mixer Anatoly I. Shikhatov 265,568 26 *
Mono To Stereo Synthesizer oRbEq 149,586 18 *
One Tube Regenerative Radio NEW! 168,286 4 *
Op Amp Radio 408,829 80 *
Single Chip AM Radio NEW! 113,975 4 *
Single Chip FM Radio NEW! 190,228 1 *
Sound Level Meter 357,977 51 *
Stereo Tube Amplifier Weslee Kinsler 284,417 15 *
Tone Control 326,321 31
Transistor Organ 216,015 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,716 27 *
FM Telephone Bug 247,341 57
Phone Busy Indicator 227,012 24 *
Remote Telephone Ringer 130,159 3 *
Ringing Phone Light Flasher 235,125 35 *
Simple Phone Tap Derek Tombrello 396,879 98 *
Telephone Hold Button 141,043 10
Telephone Recorder 229,390 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.