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
Tuesday, March 25, 2025		 12VDC To 120VAC Inverter55
12VDC To 120VAC Inverter55
Yesterday
Monday, March 24, 2025		 FM Transmitter29
12VDC To 120VAC Inverter29
Of All Time 12VDC To 120VAC Inverter1,544,227
FM Transmitter1,019,126

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,468 61 *
Car Alarm Arming Horn Beep Canceller bob 139,747 6 *
Wireless Auto Tachometer 347,158 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,126 29 *
Parallel (Printer) Port Interface 291,729 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,648 63 *
3 Channel Spectrum Analyzer 226,734 20
40W Fluorescent Lamp Inverter Bart Milnes 333,982 60 *
Adjustable Strobe Light 313,810 36
Black Light 287,162 29
Colour (Sound) Organ 295,557 36
Electronic Dice NEW! 193,076 10 *
Fantastic Atom Expander 206,389 25
Flash Slave Trigger 225,517 18 *
Infa-Red Remote Control 642,288 216 *
IR Remote Extender NEW! 136,801 3 *
IR Remote Jammer Carl 271,019 110 *
IR Remote Switch NEW! 161,122 9 *
LASER Transmitter/Receiver 422,468 92
LED Chaser 451,556 83 *
LED Metronome NEW! 103,129 3 *
LED Thermometer 210,543 22 *
Light/Dark Detector 309,763 90 *
Simple Colour Organ 140,793 11 *
Strobe Light 279,586 27 *
TRIAC Light Dimmer 558,704 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,003 122 *
Electromagnetic Levitator NEW! 148,085 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,998 214 *
AC Motor Speed Controller 398,232 29 *
Air Flow Detector 255,818 54 *
Digital Keypad Combination Lock 205,757 20
Low Voltage Alarm 233,225 58 *
Pine Racecar Victory Judge 106,012 1 *
Pulse Width Modulation DC Motor Control 660,533 94
Rain Detector 309,152 112 *
Simple Lie Detector 569,998 323
Simple Polarity Tester Dudley LeRoux 169,300 13 *
Simple Servo Controller 225,749 22 *
Simple Touch Switch NEW! 173,988 6 *
Simple Two Speed Contactor DC Motor Controller 209,317 21 *
Stepper Motor Controller 755,885 120 *
Time Delay Relay 560,790 88
Time Delay Relay II jawaharlal@excite.com 251,727 39 *
Touch Switch 294,210 51 *
Video Activated Relay 125,420 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,831 10 *
Water Detector With Sump/Bilge Pump Controller 156,928 18 *
Wire Loop Alarm Alex Meaden 209,422 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,244 25 *
12VDC To 120VAC Inverter 1,544,227 691
6V to 12V Converter 533,935 121
Automatic 12V Lead Acid Battery Charger 943,736 248
Automatic Load Sensing Power Switch 171,663 16 *
Car Battery Charger 889,108 159 *
Dual Polarity Power Supply 376,242 84 *
Fixed Voltage Power Supply 316,214 52 *
High Current Power Supply 345,819 66 *
High Voltage High Current Power Supply 268,639 35 *
LASER Power Supply 301,437 28
Portable CD Player Adapter For Car 216,348 12 *
Power Supply 745,110 259 *
Solid State Tesla Coil NEW! 151,531 4
Solid State Tesla Coil/High Voltage Generator 451,010 51
Transformerless Power Supply 468,369 117 *
Voltage Inverter 346,554 51 *
Voltage Inverter II 208,132 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,532 182
3 Watt FM Transmitter Rae XL Tkacik 342,395 83 *
50 Watt Amplifier 514,075 74
8 Note Tune Player 144,619 12 *
8 Watt Audio Amp 379,661 67 *
Aircraft Radio Communications Receiver 285,010 50 *
Crystal Radio 163,909 53 *
Digital Volume Control 343,828 47 *
Electronic Stethoscope 327,206 142 *
FET Audio Mixer 348,809 41
FM Transmitter 1,019,126 420
Guitar Fuzz Effect 252,912 54 *
Microphone Mixer Anatoly I. Shikhatov 255,410 26 *
Mono To Stereo Synthesizer oRbEq 138,855 18 *
One Tube Regenerative Radio NEW! 151,849 4 *
Op Amp Radio 396,026 80 *
Single Chip AM Radio NEW! 104,125 4 *
Single Chip FM Radio NEW! 177,943 1 *
Sound Level Meter 346,980 51 *
Stereo Tube Amplifier Weslee Kinsler 273,280 15 *
Tone Control 314,933 31
Transistor Organ 204,849 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,236 27 *
FM Telephone Bug 238,808 57
Phone Busy Indicator 217,754 24 *
Remote Telephone Ringer 121,700 3 *
Ringing Phone Light Flasher 223,565 35 *
Simple Phone Tap Derek Tombrello 387,689 98 *
Telephone Hold Button 132,763 10
Telephone Recorder 220,597 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.