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		 Stepper Motor Controller16
One Tube Regenerative Radio10
Yesterday
Tuesday, January 14, 2025		 12VDC To 120VAC Inverter34
One Tube Regenerative Radio33
Of All Time 12VDC To 120VAC Inverter1,541,792
FM Transmitter1,017,339

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 229,813 61 *
Car Alarm Arming Horn Beep Canceller bob 139,200 6 *
Wireless Auto Tachometer 346,435 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,507 29 *
Parallel (Printer) Port Interface 290,763 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 451,713 63 *
3 Channel Spectrum Analyzer 225,794 20
40W Fluorescent Lamp Inverter Bart Milnes 333,236 60 *
Adjustable Strobe Light 312,986 36
Black Light 285,917 29
Colour (Sound) Organ 294,627 36
Electronic Dice NEW! 192,319 10 *
Fantastic Atom Expander 205,764 25
Flash Slave Trigger 224,763 18 *
Infa-Red Remote Control 641,331 216 *
IR Remote Extender NEW! 136,000 3 *
IR Remote Jammer Carl 270,082 110 *
IR Remote Switch NEW! 160,418 9 *
LASER Transmitter/Receiver 421,506 92
LED Chaser 450,526 83 *
LED Metronome NEW! 102,452 3 *
LED Thermometer 209,860 22 *
Light/Dark Detector 309,014 90 *
Simple Colour Organ 140,192 11 *
Strobe Light 278,886 27 *
TRIAC Light Dimmer 557,708 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,106 122 *
Electromagnetic Levitator NEW! 147,369 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 927,761 214 *
AC Motor Speed Controller 396,963 29 *
Air Flow Detector 255,044 54 *
Digital Keypad Combination Lock 205,092 20
Low Voltage Alarm 232,471 58 *
Pine Racecar Victory Judge 105,374 1 *
Pulse Width Modulation DC Motor Control 659,491 94
Rain Detector 308,307 112 *
Simple Lie Detector 569,040 323
Simple Polarity Tester Dudley LeRoux 168,592 13 *
Simple Servo Controller 224,936 22 *
Simple Touch Switch NEW! 173,195 6 *
Simple Two Speed Contactor DC Motor Controller 208,553 21 *
Stepper Motor Controller 753,979 120 *
Time Delay Relay 559,811 88
Time Delay Relay II jawaharlal@excite.com 250,941 39 *
Touch Switch 293,391 51 *
Video Activated Relay 124,767 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,037 10 *
Water Detector With Sump/Bilge Pump Controller 156,222 18 *
Wire Loop Alarm Alex Meaden 208,745 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 321,763 25 *
12VDC To 120VAC Inverter 1,541,792 691
6V to 12V Converter 532,723 121
Automatic 12V Lead Acid Battery Charger 942,471 248
Automatic Load Sensing Power Switch 170,919 16 *
Car Battery Charger 888,042 159 *
Dual Polarity Power Supply 375,341 84 *
Fixed Voltage Power Supply 315,416 52 *
High Current Power Supply 344,664 66 *
High Voltage High Current Power Supply 267,828 35 *
LASER Power Supply 300,491 28
Portable CD Player Adapter For Car 215,590 12 *
Power Supply 744,064 259 *
Solid State Tesla Coil NEW! 150,586 4
Solid State Tesla Coil/High Voltage Generator 449,811 51
Transformerless Power Supply 467,508 117 *
Voltage Inverter 345,198 51 *
Voltage Inverter II 207,254 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 589,634 182
3 Watt FM Transmitter Rae XL Tkacik 341,009 83 *
50 Watt Amplifier 513,045 74
8 Note Tune Player 143,953 12 *
8 Watt Audio Amp 378,628 67 *
Aircraft Radio Communications Receiver 283,856 49 *
Crystal Radio 162,870 53 *
Digital Volume Control 342,914 47 *
Electronic Stethoscope 326,140 142 *
FET Audio Mixer 347,819 41
FM Transmitter 1,017,339 420
Guitar Fuzz Effect 251,842 54 *
Microphone Mixer Anatoly I. Shikhatov 254,599 26 *
Mono To Stereo Synthesizer oRbEq 138,018 18 *
One Tube Regenerative Radio NEW! 149,918 4 *
Op Amp Radio 394,842 80 *
Single Chip AM Radio NEW! 103,326 3 *
Single Chip FM Radio NEW! 176,855 1 *
Sound Level Meter 346,029 51 *
Stereo Tube Amplifier Weslee Kinsler 272,299 15 *
Tone Control 314,011 31
Transistor Organ 203,941 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,591 27 *
FM Telephone Bug 238,127 57
Phone Busy Indicator 217,016 24 *
Remote Telephone Ringer 121,136 3 *
Ringing Phone Light Flasher 222,618 35 *
Simple Phone Tap Derek Tombrello 386,942 98 *
Telephone Hold Button 132,088 10
Telephone Recorder 219,890 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.