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, April 07, 2026		 12VDC To 120VAC Inverter34
FM Transmitter30
Yesterday
Monday, April 06, 2026		 12VDC To 120VAC Inverter40
12V To 24V DC-DC Converter36
Of All Time 12VDC To 120VAC Inverter1,562,408
FM Transmitter1,033,064

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,669 61 *
Car Alarm Arming Horn Beep Canceller bob 145,292 6 *
Wireless Auto Tachometer 354,211 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 168,315 29 *
Parallel (Printer) Port Interface 300,064 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 460,171 63 *
3 Channel Spectrum Analyzer 234,131 20
40W Fluorescent Lamp Inverter Bart Milnes 340,592 60 *
Adjustable Strobe Light 321,417 36
Black Light 296,201 29
Colour (Sound) Organ 303,587 36
Electronic Dice NEW! 199,952 10 *
Fantastic Atom Expander 212,228 25
Flash Slave Trigger 232,479 18 *
Infa-Red Remote Control 651,167 216 *
IR Remote Extender NEW! 143,428 3 *
IR Remote Jammer Carl 278,319 110 *
IR Remote Switch NEW! 167,686 9 *
LASER Transmitter/Receiver 430,637 92
LED Chaser 460,241 83 *
LED Metronome NEW! 109,450 3 *
LED Thermometer 216,379 22 *
Light/Dark Detector 315,921 90 *
Simple Colour Organ 146,726 11 *
Strobe Light 285,735 27 *
TRIAC Light Dimmer 566,770 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,913 122 *
Electromagnetic Levitator NEW! 154,178 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 939,753 214 *
AC Motor Speed Controller 407,700 29 *
Air Flow Detector 262,116 54 *
Digital Keypad Combination Lock 211,885 20
Low Voltage Alarm 240,032 58 *
Pine Racecar Victory Judge 111,564 1 *
Pulse Width Modulation DC Motor Control 668,962 94
Rain Detector 315,948 112 *
Simple Lie Detector 578,265 323
Simple Polarity Tester Dudley LeRoux 175,969 13 *
Simple Servo Controller 232,818 22 *
Simple Touch Switch NEW! 180,977 6 *
Simple Two Speed Contactor DC Motor Controller 216,258 21 *
Stepper Motor Controller 768,110 120 *
Time Delay Relay 568,481 88
Time Delay Relay II jawaharlal@excite.com 258,551 39 *
Touch Switch 301,155 51 *
Video Activated Relay 131,120 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 193,362 10 *
Water Detector With Sump/Bilge Pump Controller 163,324 18 *
Wire Loop Alarm Alex Meaden 215,444 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 334,439 25 *
12VDC To 120VAC Inverter 1,562,408 691
6V to 12V Converter 542,697 121
Automatic 12V Lead Acid Battery Charger 953,269 248
Automatic Load Sensing Power Switch 178,285 16 *
Car Battery Charger 897,854 159 *
Dual Polarity Power Supply 384,566 84 *
Fixed Voltage Power Supply 322,749 52 *
High Current Power Supply 354,599 66 *
High Voltage High Current Power Supply 275,903 35 *
LASER Power Supply 308,433 28
Portable CD Player Adapter For Car 222,874 12 *
Power Supply 753,246 259 *
Solid State Tesla Coil NEW! 160,051 4
Solid State Tesla Coil/High Voltage Generator 460,866 51
Transformerless Power Supply 475,925 117 *
Voltage Inverter 356,672 51 *
Voltage Inverter II 214,933 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,939 182
3 Watt FM Transmitter Rae XL Tkacik 352,054 83 *
50 Watt Amplifier 522,576 74
8 Note Tune Player 150,636 12 *
8 Watt Audio Amp 389,028 67 *
Aircraft Radio Communications Receiver 293,562 50 *
Crystal Radio 172,596 53 *
Digital Volume Control 351,982 47 *
Electronic Stethoscope 335,176 142 *
FET Audio Mixer 355,924 41
FM Transmitter 1,033,064 420
Guitar Fuzz Effect 261,486 54 *
Microphone Mixer Anatoly I. Shikhatov 262,387 26 *
Mono To Stereo Synthesizer oRbEq 146,083 18 *
One Tube Regenerative Radio NEW! 163,434 4 *
Op Amp Radio 404,668 80 *
Single Chip AM Radio NEW! 110,683 4 *
Single Chip FM Radio NEW! 186,078 1 *
Sound Level Meter 354,462 51 *
Stereo Tube Amplifier Weslee Kinsler 281,185 15 *
Tone Control 322,863 31
Transistor Organ 212,144 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,934 27 *
FM Telephone Bug 244,360 57
Phone Busy Indicator 223,835 24 *
Remote Telephone Ringer 127,447 3 *
Ringing Phone Light Flasher 231,417 35 *
Simple Phone Tap Derek Tombrello 393,980 98 *
Telephone Hold Button 138,440 10
Telephone Recorder 226,319 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.