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
Saturday, December 06, 2025		 12VDC To 120VAC Inverter15
12V To 24V DC-DC Converter14
Yesterday
Friday, December 05, 2025		 12VDC To 120VAC Inverter29
Solid State Tesla Coil29
Of All Time 12VDC To 120VAC Inverter1,557,053
FM Transmitter1,029,155

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 235,009 61 *
Car Alarm Arming Horn Beep Canceller bob 143,775 6 *
Wireless Auto Tachometer 352,140 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 166,934 29 *
Parallel (Printer) Port Interface 297,798 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 458,089 63 *
3 Channel Spectrum Analyzer 232,142 20
40W Fluorescent Lamp Inverter Bart Milnes 338,652 60 *
Adjustable Strobe Light 319,437 36
Black Light 293,811 29
Colour (Sound) Organ 301,263 36
Electronic Dice NEW! 198,075 10 *
Fantastic Atom Expander 210,574 25
Flash Slave Trigger 230,436 18 *
Infa-Red Remote Control 649,011 216 *
IR Remote Extender NEW! 141,520 3 *
IR Remote Jammer Carl 276,335 110 *
IR Remote Switch NEW! 165,911 9 *
LASER Transmitter/Receiver 428,360 92
LED Chaser 457,732 83 *
LED Metronome NEW! 107,711 3 *
LED Thermometer 214,791 22 *
Light/Dark Detector 314,179 90 *
Simple Colour Organ 145,163 11 *
Strobe Light 284,064 27 *
TRIAC Light Dimmer 564,318 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 370,412 122 *
Electromagnetic Levitator NEW! 152,475 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 936,496 214 *
AC Motor Speed Controller 405,154 29 *
Air Flow Detector 260,291 54 *
Digital Keypad Combination Lock 210,138 20
Low Voltage Alarm 238,117 58 *
Pine Racecar Victory Judge 110,035 1 *
Pulse Width Modulation DC Motor Control 666,588 94
Rain Detector 314,026 112 *
Simple Lie Detector 575,999 323
Simple Polarity Tester Dudley LeRoux 174,090 13 *
Simple Servo Controller 230,852 22 *
Simple Touch Switch NEW! 178,955 6 *
Simple Two Speed Contactor DC Motor Controller 214,357 21 *
Stepper Motor Controller 764,953 120 *
Time Delay Relay 566,278 88
Time Delay Relay II jawaharlal@excite.com 256,617 39 *
Touch Switch 299,238 51 *
Video Activated Relay 129,663 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 191,090 10 *
Water Detector With Sump/Bilge Pump Controller 161,331 18 *
Wire Loop Alarm Alex Meaden 213,804 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 331,091 25 *
12VDC To 120VAC Inverter 1,557,053 691
6V to 12V Converter 540,136 121
Automatic 12V Lead Acid Battery Charger 950,183 248
Automatic Load Sensing Power Switch 176,399 16 *
Car Battery Charger 895,389 159 *
Dual Polarity Power Supply 382,210 84 *
Fixed Voltage Power Supply 321,011 52 *
High Current Power Supply 352,186 66 *
High Voltage High Current Power Supply 273,754 35 *
LASER Power Supply 306,520 28
Portable CD Player Adapter For Car 221,018 12 *
Power Supply 750,826 259 *
Solid State Tesla Coil NEW! 157,379 4
Solid State Tesla Coil/High Voltage Generator 457,878 51
Transformerless Power Supply 473,815 117 *
Voltage Inverter 354,019 51 *
Voltage Inverter II 212,983 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 595,828 182
3 Watt FM Transmitter Rae XL Tkacik 349,488 83 *
50 Watt Amplifier 520,234 74
8 Note Tune Player 148,924 12 *
8 Watt Audio Amp 386,383 67 *
Aircraft Radio Communications Receiver 291,057 50 *
Crystal Radio 169,995 53 *
Digital Volume Control 349,807 47 *
Electronic Stethoscope 332,858 142 *
FET Audio Mixer 353,968 41
FM Transmitter 1,029,155 420
Guitar Fuzz Effect 259,024 54 *
Microphone Mixer Anatoly I. Shikhatov 260,402 26 *
Mono To Stereo Synthesizer oRbEq 144,061 18 *
One Tube Regenerative Radio NEW! 160,429 4 *
Op Amp Radio 402,337 80 *
Single Chip AM Radio NEW! 108,712 4 *
Single Chip FM Radio NEW! 183,733 1 *
Sound Level Meter 352,316 51 *
Stereo Tube Amplifier Weslee Kinsler 278,837 15 *
Tone Control 320,534 31
Transistor Organ 210,054 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,335 27 *
FM Telephone Bug 242,753 57
Phone Busy Indicator 222,063 24 *
Remote Telephone Ringer 125,639 3 *
Ringing Phone Light Flasher 229,019 35 *
Simple Phone Tap Derek Tombrello 392,124 98 *
Telephone Hold Button 136,801 10
Telephone Recorder 224,697 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.