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 15, 2025		 Transformerless Power Supply4
One Tube Regenerative Radio3
Yesterday
Monday, April 14, 2025		 12VDC To 120VAC Inverter45
LED Chaser30
Of All Time 12VDC To 120VAC Inverter1,545,169
FM Transmitter1,019,620

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,685 61 *
Car Alarm Arming Horn Beep Canceller bob 139,932 6 *
Wireless Auto Tachometer 347,413 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,321 29 *
Parallel (Printer) Port Interface 292,037 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,905 63 *
3 Channel Spectrum Analyzer 227,047 20
40W Fluorescent Lamp Inverter Bart Milnes 334,196 60 *
Adjustable Strobe Light 314,095 36
Black Light 287,507 29
Colour (Sound) Organ 295,808 36
Electronic Dice NEW! 193,293 10 *
Fantastic Atom Expander 206,578 25
Flash Slave Trigger 225,766 18 *
Infa-Red Remote Control 642,581 216 *
IR Remote Extender NEW! 137,032 3 *
IR Remote Jammer Carl 271,345 110 *
IR Remote Switch NEW! 161,331 9 *
LASER Transmitter/Receiver 422,749 92
LED Chaser 451,858 83 *
LED Metronome NEW! 103,335 3 *
LED Thermometer 210,746 22 *
Light/Dark Detector 309,959 90 *
Simple Colour Organ 140,975 11 *
Strobe Light 279,811 27 *
TRIAC Light Dimmer 558,970 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,283 122 *
Electromagnetic Levitator NEW! 148,317 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,364 214 *
AC Motor Speed Controller 398,551 29 *
Air Flow Detector 256,016 54 *
Digital Keypad Combination Lock 205,958 20
Low Voltage Alarm 233,431 58 *
Pine Racecar Victory Judge 106,185 1 *
Pulse Width Modulation DC Motor Control 660,832 94
Rain Detector 309,390 112 *
Simple Lie Detector 570,300 323
Simple Polarity Tester Dudley LeRoux 169,493 13 *
Simple Servo Controller 226,029 22 *
Simple Touch Switch NEW! 174,213 6 *
Simple Two Speed Contactor DC Motor Controller 209,549 21 *
Stepper Motor Controller 756,412 120 *
Time Delay Relay 561,088 88
Time Delay Relay II jawaharlal@excite.com 251,933 39 *
Touch Switch 294,428 51 *
Video Activated Relay 125,608 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,073 10 *
Water Detector With Sump/Bilge Pump Controller 157,140 18 *
Wire Loop Alarm Alex Meaden 209,616 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,595 25 *
12VDC To 120VAC Inverter 1,545,169 691
6V to 12V Converter 534,297 121
Automatic 12V Lead Acid Battery Charger 944,063 248
Automatic Load Sensing Power Switch 171,885 16 *
Car Battery Charger 889,431 159 *
Dual Polarity Power Supply 376,516 84 *
Fixed Voltage Power Supply 316,443 52 *
High Current Power Supply 346,133 66 *
High Voltage High Current Power Supply 268,890 35 *
LASER Power Supply 301,704 28
Portable CD Player Adapter For Car 216,564 12 *
Power Supply 745,433 259 *
Solid State Tesla Coil NEW! 151,833 4
Solid State Tesla Coil/High Voltage Generator 451,350 51
Transformerless Power Supply 468,637 117 *
Voltage Inverter 347,010 51 *
Voltage Inverter II 208,345 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,825 182
3 Watt FM Transmitter Rae XL Tkacik 342,735 83 *
50 Watt Amplifier 514,381 74
8 Note Tune Player 144,835 12 *
8 Watt Audio Amp 379,974 67 *
Aircraft Radio Communications Receiver 285,361 50 *
Crystal Radio 164,175 53 *
Digital Volume Control 344,093 47 *
Electronic Stethoscope 327,489 142 *
FET Audio Mixer 349,088 41
FM Transmitter 1,019,620 420
Guitar Fuzz Effect 253,251 54 *
Microphone Mixer Anatoly I. Shikhatov 255,661 26 *
Mono To Stereo Synthesizer oRbEq 139,138 18 *
One Tube Regenerative Radio NEW! 152,308 4 *
Op Amp Radio 396,353 80 *
Single Chip AM Radio NEW! 104,344 4 *
Single Chip FM Radio NEW! 178,252 1 *
Sound Level Meter 347,259 51 *
Stereo Tube Amplifier Weslee Kinsler 273,532 15 *
Tone Control 315,187 31
Transistor Organ 205,195 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,420 27 *
FM Telephone Bug 239,004 57
Phone Busy Indicator 217,973 24 *
Remote Telephone Ringer 121,886 3 *
Ringing Phone Light Flasher 223,837 35 *
Simple Phone Tap Derek Tombrello 387,947 98 *
Telephone Hold Button 132,962 10
Telephone Recorder 220,808 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.