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, January 15, 2025		 FM Transmitter21
Stepper Motor Controller21
Yesterday
Tuesday, January 14, 2025		 12VDC To 120VAC Inverter34
One Tube Regenerative Radio33
Of All Time 12VDC To 120VAC Inverter1,541,801
FM Transmitter1,017,350

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 229,816 61 *
Car Alarm Arming Horn Beep Canceller bob 139,203 6 *
Wireless Auto Tachometer 346,437 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,509 29 *
Parallel (Printer) Port Interface 290,765 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 451,715 63 *
3 Channel Spectrum Analyzer 225,798 20
40W Fluorescent Lamp Inverter Bart Milnes 333,239 60 *
Adjustable Strobe Light 312,990 36
Black Light 285,925 29
Colour (Sound) Organ 294,631 36
Electronic Dice NEW! 192,322 10 *
Fantastic Atom Expander 205,767 25
Flash Slave Trigger 224,767 18 *
Infa-Red Remote Control 641,334 216 *
IR Remote Extender NEW! 136,006 3 *
IR Remote Jammer Carl 270,085 110 *
IR Remote Switch NEW! 160,422 9 *
LASER Transmitter/Receiver 421,511 92
LED Chaser 450,531 83 *
LED Metronome NEW! 102,456 3 *
LED Thermometer 209,864 22 *
Light/Dark Detector 309,016 90 *
Simple Colour Organ 140,194 11 *
Strobe Light 278,890 27 *
TRIAC Light Dimmer 557,715 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,108 122 *
Electromagnetic Levitator NEW! 147,370 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 927,766 214 *
AC Motor Speed Controller 396,974 29 *
Air Flow Detector 255,047 54 *
Digital Keypad Combination Lock 205,096 20
Low Voltage Alarm 232,474 58 *
Pine Racecar Victory Judge 105,378 1 *
Pulse Width Modulation DC Motor Control 659,494 94
Rain Detector 308,309 112 *
Simple Lie Detector 569,045 323
Simple Polarity Tester Dudley LeRoux 168,598 13 *
Simple Servo Controller 224,942 22 *
Simple Touch Switch NEW! 173,201 6 *
Simple Two Speed Contactor DC Motor Controller 208,558 21 *
Stepper Motor Controller 753,984 120 *
Time Delay Relay 559,816 88
Time Delay Relay II jawaharlal@excite.com 250,949 39 *
Touch Switch 293,394 51 *
Video Activated Relay 124,770 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,046 10 *
Water Detector With Sump/Bilge Pump Controller 156,226 18 *
Wire Loop Alarm Alex Meaden 208,748 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 321,776 25 *
12VDC To 120VAC Inverter 1,541,801 691
6V to 12V Converter 532,727 121
Automatic 12V Lead Acid Battery Charger 942,482 248
Automatic Load Sensing Power Switch 170,927 16 *
Car Battery Charger 888,044 159 *
Dual Polarity Power Supply 375,347 84 *
Fixed Voltage Power Supply 315,422 52 *
High Current Power Supply 344,670 66 *
High Voltage High Current Power Supply 267,833 35 *
LASER Power Supply 300,492 28
Portable CD Player Adapter For Car 215,596 12 *
Power Supply 744,071 259 *
Solid State Tesla Coil NEW! 150,592 4
Solid State Tesla Coil/High Voltage Generator 449,814 51
Transformerless Power Supply 467,512 117 *
Voltage Inverter 345,205 51 *
Voltage Inverter II 207,260 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,637 182
3 Watt FM Transmitter Rae XL Tkacik 341,011 83 *
50 Watt Amplifier 513,048 74
8 Note Tune Player 143,958 12 *
8 Watt Audio Amp 378,640 67 *
Aircraft Radio Communications Receiver 283,862 49 *
Crystal Radio 162,873 53 *
Digital Volume Control 342,917 47 *
Electronic Stethoscope 326,147 142 *
FET Audio Mixer 347,825 41
FM Transmitter 1,017,350 420
Guitar Fuzz Effect 251,848 54 *
Microphone Mixer Anatoly I. Shikhatov 254,605 26 *
Mono To Stereo Synthesizer oRbEq 138,023 18 *
One Tube Regenerative Radio NEW! 149,921 4 *
Op Amp Radio 394,848 80 *
Single Chip AM Radio NEW! 103,333 3 *
Single Chip FM Radio NEW! 176,857 1 *
Sound Level Meter 346,033 51 *
Stereo Tube Amplifier Weslee Kinsler 272,303 15 *
Tone Control 314,018 31
Transistor Organ 203,955 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,593 27 *
FM Telephone Bug 238,130 57
Phone Busy Indicator 217,022 24 *
Remote Telephone Ringer 121,138 3 *
Ringing Phone Light Flasher 222,622 35 *
Simple Phone Tap Derek Tombrello 386,949 98 *
Telephone Hold Button 132,090 10
Telephone Recorder 219,891 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.