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, May 28, 2025		 12VDC To 120VAC Inverter40
FM Transmitter28
Yesterday
Tuesday, May 27, 2025		 12VDC To 120VAC Inverter35
Voltage Inverter31
Of All Time 12VDC To 120VAC Inverter1,547,280
FM Transmitter1,021,006

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 231,190 61 *
Car Alarm Arming Horn Beep Canceller bob 140,353 6 *
Wireless Auto Tachometer 348,017 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,734 29 *
Parallel (Printer) Port Interface 292,754 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,512 63 *
3 Channel Spectrum Analyzer 227,747 20
40W Fluorescent Lamp Inverter Bart Milnes 334,703 60 *
Adjustable Strobe Light 314,770 36
Black Light 288,383 29
Colour (Sound) Organ 296,441 36
Electronic Dice NEW! 193,902 10 *
Fantastic Atom Expander 207,045 25
Flash Slave Trigger 226,310 18 *
Infa-Red Remote Control 643,407 216 *
IR Remote Extender NEW! 137,575 3 *
IR Remote Jammer Carl 272,006 110 *
IR Remote Switch NEW! 161,886 9 *
LASER Transmitter/Receiver 423,551 92
LED Chaser 452,574 83 *
LED Metronome NEW! 103,873 3 *
LED Thermometer 211,224 22 *
Light/Dark Detector 310,447 90 *
Simple Colour Organ 141,473 11 *
Strobe Light 280,332 27 *
TRIAC Light Dimmer 559,685 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,903 122 *
Electromagnetic Levitator NEW! 148,820 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 930,512 214 *
AC Motor Speed Controller 399,438 29 *
Air Flow Detector 256,524 54 *
Digital Keypad Combination Lock 206,424 20
Low Voltage Alarm 233,976 58 *
Pine Racecar Victory Judge 106,653 1 *
Pulse Width Modulation DC Motor Control 661,540 94
Rain Detector 309,988 112 *
Simple Lie Detector 571,040 323
Simple Polarity Tester Dudley LeRoux 170,018 13 *
Simple Servo Controller 226,649 22 *
Simple Touch Switch NEW! 174,821 6 *
Simple Two Speed Contactor DC Motor Controller 210,166 21 *
Stepper Motor Controller 757,711 120 *
Time Delay Relay 561,800 88
Time Delay Relay II jawaharlal@excite.com 252,467 39 *
Touch Switch 295,088 51 *
Video Activated Relay 126,057 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,613 10 *
Water Detector With Sump/Bilge Pump Controller 157,593 18 *
Wire Loop Alarm Alex Meaden 210,130 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,525 25 *
12VDC To 120VAC Inverter 1,547,280 691
6V to 12V Converter 535,043 121
Automatic 12V Lead Acid Battery Charger 944,934 248
Automatic Load Sensing Power Switch 172,436 16 *
Car Battery Charger 890,205 159 *
Dual Polarity Power Supply 377,243 84 *
Fixed Voltage Power Supply 316,994 52 *
High Current Power Supply 346,956 66 *
High Voltage High Current Power Supply 269,523 35 *
LASER Power Supply 302,312 28
Portable CD Player Adapter For Car 217,086 12 *
Power Supply 746,270 259 *
Solid State Tesla Coil NEW! 152,515 4
Solid State Tesla Coil/High Voltage Generator 452,286 51
Transformerless Power Supply 469,348 117 *
Voltage Inverter 347,980 51 *
Voltage Inverter II 209,028 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,453 182
3 Watt FM Transmitter Rae XL Tkacik 343,596 83 *
50 Watt Amplifier 515,137 74
8 Note Tune Player 145,341 12 *
8 Watt Audio Amp 380,787 67 *
Aircraft Radio Communications Receiver 286,191 50 *
Crystal Radio 164,900 53 *
Digital Volume Control 345,009 47 *
Electronic Stethoscope 328,159 142 *
FET Audio Mixer 349,820 41
FM Transmitter 1,021,006 420
Guitar Fuzz Effect 254,052 54 *
Microphone Mixer Anatoly I. Shikhatov 256,294 26 *
Mono To Stereo Synthesizer oRbEq 139,760 18 *
One Tube Regenerative Radio NEW! 153,420 4 *
Op Amp Radio 397,233 80 *
Single Chip AM Radio NEW! 104,903 4 *
Single Chip FM Radio NEW! 178,952 1 *
Sound Level Meter 347,960 51 *
Stereo Tube Amplifier Weslee Kinsler 274,127 15 *
Tone Control 315,848 31
Transistor Organ 205,848 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,887 27 *
FM Telephone Bug 239,444 57
Phone Busy Indicator 218,490 24 *
Remote Telephone Ringer 122,361 3 *
Ringing Phone Light Flasher 224,500 35 *
Simple Phone Tap Derek Tombrello 388,476 98 *
Telephone Hold Button 133,445 10
Telephone Recorder 221,327 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.