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, July 03, 2025		 12VDC To 120VAC Inverter45
One Tube Regenerative Radio42
Yesterday
Wednesday, July 02, 2025		 12VDC To 120VAC Inverter62
FM Transmitter36
Of All Time 12VDC To 120VAC Inverter1,549,871
FM Transmitter1,023,197

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 232,562 61 *
Car Alarm Arming Horn Beep Canceller bob 141,582 6 *
Wireless Auto Tachometer 349,390 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 164,936 29 *
Parallel (Printer) Port Interface 294,227 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 455,004 63 *
3 Channel Spectrum Analyzer 229,186 20
40W Fluorescent Lamp Inverter Bart Milnes 336,057 60 *
Adjustable Strobe Light 316,421 36
Black Light 290,331 29
Colour (Sound) Organ 297,953 36
Electronic Dice NEW! 195,272 10 *
Fantastic Atom Expander 208,265 25
Flash Slave Trigger 227,717 18 *
Infa-Red Remote Control 645,365 216 *
IR Remote Extender NEW! 138,902 3 *
IR Remote Jammer Carl 273,356 110 *
IR Remote Switch NEW! 163,265 9 *
LASER Transmitter/Receiver 425,183 92
LED Chaser 454,150 83 *
LED Metronome NEW! 105,161 3 *
LED Thermometer 212,448 22 *
Light/Dark Detector 311,700 90 *
Simple Colour Organ 142,743 11 *
Strobe Light 281,618 27 *
TRIAC Light Dimmer 561,151 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 367,271 122 *
Electromagnetic Levitator NEW! 150,075 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 932,205 214 *
AC Motor Speed Controller 401,016 29 *
Air Flow Detector 257,786 54 *
Digital Keypad Combination Lock 207,634 20
Low Voltage Alarm 235,301 58 *
Pine Racecar Victory Judge 107,823 1 *
Pulse Width Modulation DC Motor Control 663,026 94
Rain Detector 311,316 112 *
Simple Lie Detector 572,571 323
Simple Polarity Tester Dudley LeRoux 171,262 13 *
Simple Servo Controller 228,036 22 *
Simple Touch Switch NEW! 176,106 6 *
Simple Two Speed Contactor DC Motor Controller 211,552 21 *
Stepper Motor Controller 759,830 120 *
Time Delay Relay 563,250 88
Time Delay Relay II jawaharlal@excite.com 253,797 39 *
Touch Switch 296,440 51 *
Video Activated Relay 127,288 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 187,931 10 *
Water Detector With Sump/Bilge Pump Controller 158,811 18 *
Wire Loop Alarm Alex Meaden 211,407 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 326,037 25 *
12VDC To 120VAC Inverter 1,549,871 691
6V to 12V Converter 536,571 121
Automatic 12V Lead Acid Battery Charger 946,549 248
Automatic Load Sensing Power Switch 173,706 16 *
Car Battery Charger 891,809 159 *
Dual Polarity Power Supply 378,715 84 *
Fixed Voltage Power Supply 318,320 52 *
High Current Power Supply 348,393 66 *
High Voltage High Current Power Supply 270,919 35 *
LASER Power Supply 303,708 28
Portable CD Player Adapter For Car 218,384 12 *
Power Supply 747,663 259 *
Solid State Tesla Coil NEW! 153,963 4
Solid State Tesla Coil/High Voltage Generator 453,978 51
Transformerless Power Supply 470,755 117 *
Voltage Inverter 349,637 51 *
Voltage Inverter II 210,295 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 592,899 182
3 Watt FM Transmitter Rae XL Tkacik 345,252 83 *
50 Watt Amplifier 516,773 74
8 Note Tune Player 146,644 12 *
8 Watt Audio Amp 382,450 67 *
Aircraft Radio Communications Receiver 287,726 50 *
Crystal Radio 166,405 53 *
Digital Volume Control 346,654 47 *
Electronic Stethoscope 329,603 142 *
FET Audio Mixer 351,228 41
FM Transmitter 1,023,197 420
Guitar Fuzz Effect 255,521 54 *
Microphone Mixer Anatoly I. Shikhatov 257,618 26 *
Mono To Stereo Synthesizer oRbEq 141,188 18 *
One Tube Regenerative Radio NEW! 155,478 4 *
Op Amp Radio 398,889 80 *
Single Chip AM Radio NEW! 106,212 4 *
Single Chip FM Radio NEW! 180,393 1 *
Sound Level Meter 349,385 51 *
Stereo Tube Amplifier Weslee Kinsler 275,466 15 *
Tone Control 317,351 31
Transistor Organ 207,275 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,093 27 *
FM Telephone Bug 240,646 57
Phone Busy Indicator 219,780 24 *
Remote Telephone Ringer 123,536 3 *
Ringing Phone Light Flasher 225,869 35 *
Simple Phone Tap Derek Tombrello 389,742 98 *
Telephone Hold Button 134,761 10
Telephone Recorder 222,493 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.