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, February 21, 2025		 Stepper Motor Controller14
Black Light13
Yesterday
Thursday, February 20, 2025		 Stepper Motor Controller35
12VDC To 120VAC Inverter30
Of All Time 12VDC To 120VAC Inverter1,543,083
FM Transmitter1,018,254

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,122 61 *
Car Alarm Arming Horn Beep Canceller bob 139,475 6 *
Wireless Auto Tachometer 346,779 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,799 29 *
Parallel (Printer) Port Interface 291,226 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,176 63 *
3 Channel Spectrum Analyzer 226,260 20
40W Fluorescent Lamp Inverter Bart Milnes 333,594 60 *
Adjustable Strobe Light 313,375 36
Black Light 286,544 29
Colour (Sound) Organ 295,078 36
Electronic Dice NEW! 192,677 10 *
Fantastic Atom Expander 206,072 25
Flash Slave Trigger 225,107 18 *
Infa-Red Remote Control 641,817 216 *
IR Remote Extender NEW! 136,397 3 *
IR Remote Jammer Carl 270,538 110 *
IR Remote Switch NEW! 160,752 9 *
LASER Transmitter/Receiver 421,982 92
LED Chaser 451,049 83 *
LED Metronome NEW! 102,780 3 *
LED Thermometer 210,189 22 *
Light/Dark Detector 309,373 90 *
Simple Colour Organ 140,467 11 *
Strobe Light 279,219 27 *
TRIAC Light Dimmer 558,215 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,518 122 *
Electromagnetic Levitator NEW! 147,744 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,342 214 *
AC Motor Speed Controller 397,616 29 *
Air Flow Detector 255,404 54 *
Digital Keypad Combination Lock 205,402 20
Low Voltage Alarm 232,832 58 *
Pine Racecar Victory Judge 105,681 1 *
Pulse Width Modulation DC Motor Control 660,019 94
Rain Detector 308,733 112 *
Simple Lie Detector 569,509 323
Simple Polarity Tester Dudley LeRoux 168,932 13 *
Simple Servo Controller 225,344 22 *
Simple Touch Switch NEW! 173,587 6 *
Simple Two Speed Contactor DC Motor Controller 208,909 21 *
Stepper Motor Controller 755,040 120 *
Time Delay Relay 560,268 88
Time Delay Relay II jawaharlal@excite.com 251,331 39 *
Touch Switch 293,784 51 *
Video Activated Relay 125,071 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,466 10 *
Water Detector With Sump/Bilge Pump Controller 156,583 18 *
Wire Loop Alarm Alex Meaden 209,069 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 322,552 25 *
12VDC To 120VAC Inverter 1,543,083 691
6V to 12V Converter 533,340 121
Automatic 12V Lead Acid Battery Charger 943,127 248
Automatic Load Sensing Power Switch 171,282 16 *
Car Battery Charger 888,591 159 *
Dual Polarity Power Supply 375,789 84 *
Fixed Voltage Power Supply 315,840 52 *
High Current Power Supply 345,306 66 *
High Voltage High Current Power Supply 268,236 35 *
LASER Power Supply 300,978 28
Portable CD Player Adapter For Car 215,952 12 *
Power Supply 744,604 259 *
Solid State Tesla Coil NEW! 151,074 4
Solid State Tesla Coil/High Voltage Generator 450,405 51
Transformerless Power Supply 467,926 117 *
Voltage Inverter 345,881 51 *
Voltage Inverter II 207,709 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,106 182
3 Watt FM Transmitter Rae XL Tkacik 341,737 83 *
50 Watt Amplifier 513,584 74
8 Note Tune Player 144,276 12 *
8 Watt Audio Amp 379,150 67 *
Aircraft Radio Communications Receiver 284,395 50 *
Crystal Radio 163,381 53 *
Digital Volume Control 343,382 47 *
Electronic Stethoscope 326,709 142 *
FET Audio Mixer 348,328 41
FM Transmitter 1,018,254 420
Guitar Fuzz Effect 252,379 54 *
Microphone Mixer Anatoly I. Shikhatov 254,990 26 *
Mono To Stereo Synthesizer oRbEq 138,450 18 *
One Tube Regenerative Radio NEW! 150,941 4 *
Op Amp Radio 395,411 80 *
Single Chip AM Radio NEW! 103,732 4 *
Single Chip FM Radio NEW! 177,442 1 *
Sound Level Meter 346,528 51 *
Stereo Tube Amplifier Weslee Kinsler 272,793 15 *
Tone Control 314,469 31
Transistor Organ 204,377 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,927 27 *
FM Telephone Bug 238,465 57
Phone Busy Indicator 217,369 24 *
Remote Telephone Ringer 121,410 3 *
Ringing Phone Light Flasher 223,082 35 *
Simple Phone Tap Derek Tombrello 387,311 98 *
Telephone Hold Button 132,409 10
Telephone Recorder 220,266 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.