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
Monday, January 20, 2025		 12VDC To 120VAC Inverter37
One Tube Regenerative Radio32
Yesterday
Sunday, January 19, 2025		 Stepper Motor Controller28
One Tube Regenerative Radio27
Of All Time 12VDC To 120VAC Inverter1,542,006
FM Transmitter1,017,464

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 229,871 61 *
Car Alarm Arming Horn Beep Canceller bob 139,246 6 *
Wireless Auto Tachometer 346,497 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,555 29 *
Parallel (Printer) Port Interface 290,839 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 451,786 63 *
3 Channel Spectrum Analyzer 225,867 20
40W Fluorescent Lamp Inverter Bart Milnes 333,287 60 *
Adjustable Strobe Light 313,050 36
Black Light 286,030 29
Colour (Sound) Organ 294,713 36
Electronic Dice NEW! 192,382 10 *
Fantastic Atom Expander 205,813 25
Flash Slave Trigger 224,822 18 *
Infa-Red Remote Control 641,411 216 *
IR Remote Extender NEW! 136,061 3 *
IR Remote Jammer Carl 270,148 110 *
IR Remote Switch NEW! 160,466 9 *
LASER Transmitter/Receiver 421,590 92
LED Chaser 450,618 83 *
LED Metronome NEW! 102,501 3 *
LED Thermometer 209,911 22 *
Light/Dark Detector 309,074 90 *
Simple Colour Organ 140,232 11 *
Strobe Light 278,938 27 *
TRIAC Light Dimmer 557,796 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,166 122 *
Electromagnetic Levitator NEW! 147,418 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 927,858 214 *
AC Motor Speed Controller 397,094 29 *
Air Flow Detector 255,096 54 *
Digital Keypad Combination Lock 205,142 20
Low Voltage Alarm 232,529 58 *
Pine Racecar Victory Judge 105,428 1 *
Pulse Width Modulation DC Motor Control 659,582 94
Rain Detector 308,372 112 *
Simple Lie Detector 569,114 323
Simple Polarity Tester Dudley LeRoux 168,641 13 *
Simple Servo Controller 225,001 22 *
Simple Touch Switch NEW! 173,258 6 *
Simple Two Speed Contactor DC Motor Controller 208,605 21 *
Stepper Motor Controller 754,162 120 *
Time Delay Relay 559,875 88
Time Delay Relay II jawaharlal@excite.com 251,006 39 *
Touch Switch 293,450 51 *
Video Activated Relay 124,810 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,101 10 *
Water Detector With Sump/Bilge Pump Controller 156,277 18 *
Wire Loop Alarm Alex Meaden 208,798 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 321,890 25 *
12VDC To 120VAC Inverter 1,542,006 691
6V to 12V Converter 532,836 121
Automatic 12V Lead Acid Battery Charger 942,599 248
Automatic Load Sensing Power Switch 170,980 16 *
Car Battery Charger 888,134 159 *
Dual Polarity Power Supply 375,424 84 *
Fixed Voltage Power Supply 315,482 52 *
High Current Power Supply 344,775 66 *
High Voltage High Current Power Supply 267,885 35 *
LASER Power Supply 300,567 28
Portable CD Player Adapter For Car 215,656 12 *
Power Supply 744,161 259 *
Solid State Tesla Coil NEW! 150,654 4
Solid State Tesla Coil/High Voltage Generator 449,898 51
Transformerless Power Supply 467,575 117 *
Voltage Inverter 345,300 51 *
Voltage Inverter II 207,315 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,726 182
3 Watt FM Transmitter Rae XL Tkacik 341,105 83 *
50 Watt Amplifier 513,130 74
8 Note Tune Player 144,002 12 *
8 Watt Audio Amp 378,729 67 *
Aircraft Radio Communications Receiver 283,952 49 *
Crystal Radio 162,936 53 *
Digital Volume Control 342,998 47 *
Electronic Stethoscope 326,240 142 *
FET Audio Mixer 347,898 41
FM Transmitter 1,017,464 420
Guitar Fuzz Effect 251,933 54 *
Microphone Mixer Anatoly I. Shikhatov 254,665 26 *
Mono To Stereo Synthesizer oRbEq 138,088 18 *
One Tube Regenerative Radio NEW! 150,080 4 *
Op Amp Radio 394,933 80 *
Single Chip AM Radio NEW! 103,404 3 *
Single Chip FM Radio NEW! 176,938 1 *
Sound Level Meter 346,091 51 *
Stereo Tube Amplifier Weslee Kinsler 272,390 15 *
Tone Control 314,078 31
Transistor Organ 204,022 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,638 27 *
FM Telephone Bug 238,189 57
Phone Busy Indicator 217,079 24 *
Remote Telephone Ringer 121,176 3 *
Ringing Phone Light Flasher 222,692 35 *
Simple Phone Tap Derek Tombrello 386,993 98 *
Telephone Hold Button 132,153 10
Telephone Recorder 219,947 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.