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
Friday, January 24, 2025		 Stepper Motor Controller38
Op Amp Radio28
Yesterday
Thursday, January 23, 2025		 12VDC To 120VAC Inverter42
Sound Level Meter37
Of All Time 12VDC To 120VAC Inverter1,542,149
FM Transmitter1,017,580

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 229,915 61 *
Car Alarm Arming Horn Beep Canceller bob 139,290 6 *
Wireless Auto Tachometer 346,547 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,596 29 *
Parallel (Printer) Port Interface 290,888 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 451,850 63 *
3 Channel Spectrum Analyzer 225,924 20
40W Fluorescent Lamp Inverter Bart Milnes 333,335 60 *
Adjustable Strobe Light 313,101 36
Black Light 286,113 29
Colour (Sound) Organ 294,763 36
Electronic Dice NEW! 192,419 10 *
Fantastic Atom Expander 205,843 25
Flash Slave Trigger 224,868 18 *
Infa-Red Remote Control 641,458 216 *
IR Remote Extender NEW! 136,102 3 *
IR Remote Jammer Carl 270,193 110 *
IR Remote Switch NEW! 160,494 9 *
LASER Transmitter/Receiver 421,653 92
LED Chaser 450,685 83 *
LED Metronome NEW! 102,542 3 *
LED Thermometer 209,952 22 *
Light/Dark Detector 309,109 90 *
Simple Colour Organ 140,265 11 *
Strobe Light 278,978 27 *
TRIAC Light Dimmer 557,856 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,225 122 *
Electromagnetic Levitator NEW! 147,469 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 927,920 214 *
AC Motor Speed Controller 397,173 29 *
Air Flow Detector 255,136 54 *
Digital Keypad Combination Lock 205,183 20
Low Voltage Alarm 232,569 58 *
Pine Racecar Victory Judge 105,461 1 *
Pulse Width Modulation DC Motor Control 659,646 94
Rain Detector 308,414 112 *
Simple Lie Detector 569,168 323
Simple Polarity Tester Dudley LeRoux 168,680 13 *
Simple Servo Controller 225,047 22 *
Simple Touch Switch NEW! 173,311 6 *
Simple Two Speed Contactor DC Motor Controller 208,651 21 *
Stepper Motor Controller 754,276 120 *
Time Delay Relay 559,921 88
Time Delay Relay II jawaharlal@excite.com 251,048 39 *
Touch Switch 293,487 51 *
Video Activated Relay 124,845 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,159 10 *
Water Detector With Sump/Bilge Pump Controller 156,323 18 *
Wire Loop Alarm Alex Meaden 208,832 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 321,962 25 *
12VDC To 120VAC Inverter 1,542,149 691
6V to 12V Converter 532,905 121
Automatic 12V Lead Acid Battery Charger 942,678 248
Automatic Load Sensing Power Switch 171,017 16 *
Car Battery Charger 888,200 159 *
Dual Polarity Power Supply 375,473 84 *
Fixed Voltage Power Supply 315,532 52 *
High Current Power Supply 344,849 66 *
High Voltage High Current Power Supply 267,939 35 *
LASER Power Supply 300,616 28
Portable CD Player Adapter For Car 215,706 12 *
Power Supply 744,217 259 *
Solid State Tesla Coil NEW! 150,713 4
Solid State Tesla Coil/High Voltage Generator 449,981 51
Transformerless Power Supply 467,623 117 *
Voltage Inverter 345,384 51 *
Voltage Inverter II 207,373 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,786 182
3 Watt FM Transmitter Rae XL Tkacik 341,190 83 *
50 Watt Amplifier 513,195 74
8 Note Tune Player 144,049 12 *
8 Watt Audio Amp 378,801 67 *
Aircraft Radio Communications Receiver 284,018 49 *
Crystal Radio 162,992 53 *
Digital Volume Control 343,063 47 *
Electronic Stethoscope 326,327 142 *
FET Audio Mixer 347,955 41
FM Transmitter 1,017,580 420
Guitar Fuzz Effect 251,990 54 *
Microphone Mixer Anatoly I. Shikhatov 254,721 26 *
Mono To Stereo Synthesizer oRbEq 138,141 18 *
One Tube Regenerative Radio NEW! 150,189 4 *
Op Amp Radio 395,018 80 *
Single Chip AM Radio NEW! 103,440 3 *
Single Chip FM Radio NEW! 176,990 1 *
Sound Level Meter 346,182 51 *
Stereo Tube Amplifier Weslee Kinsler 272,441 15 *
Tone Control 314,131 31
Transistor Organ 204,068 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,686 27 *
FM Telephone Bug 238,231 57
Phone Busy Indicator 217,122 24 *
Remote Telephone Ringer 121,215 3 *
Ringing Phone Light Flasher 222,741 35 *
Simple Phone Tap Derek Tombrello 387,049 98 *
Telephone Hold Button 132,191 10
Telephone Recorder 219,994 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.