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, February 26, 2025		 One Tube Regenerative Radio16
Crystal Radio14
Yesterday
Tuesday, February 25, 2025		 One Tube Regenerative Radio35
12VDC To 120VAC Inverter34
Of All Time 12VDC To 120VAC Inverter1,543,284
FM Transmitter1,018,391

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,192 61 *
Car Alarm Arming Horn Beep Canceller bob 139,527 6 *
Wireless Auto Tachometer 346,843 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 162,856 29 *
Parallel (Printer) Port Interface 291,303 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,261 63 *
3 Channel Spectrum Analyzer 226,336 20
40W Fluorescent Lamp Inverter Bart Milnes 333,658 60 *
Adjustable Strobe Light 313,451 36
Black Light 286,655 29
Colour (Sound) Organ 295,172 36
Electronic Dice NEW! 192,751 10 *
Fantastic Atom Expander 206,132 25
Flash Slave Trigger 225,173 18 *
Infa-Red Remote Control 641,896 216 *
IR Remote Extender NEW! 136,470 3 *
IR Remote Jammer Carl 270,627 110 *
IR Remote Switch NEW! 160,816 9 *
LASER Transmitter/Receiver 422,068 92
LED Chaser 451,135 83 *
LED Metronome NEW! 102,851 3 *
LED Thermometer 210,246 22 *
Light/Dark Detector 309,439 90 *
Simple Colour Organ 140,524 11 *
Strobe Light 279,284 27 *
TRIAC Light Dimmer 558,302 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 364,600 122 *
Electromagnetic Levitator NEW! 147,803 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 928,440 214 *
AC Motor Speed Controller 397,722 29 *
Air Flow Detector 255,480 54 *
Digital Keypad Combination Lock 205,457 20
Low Voltage Alarm 232,895 58 *
Pine Racecar Victory Judge 105,743 1 *
Pulse Width Modulation DC Motor Control 660,114 94
Rain Detector 308,803 112 *
Simple Lie Detector 569,617 323
Simple Polarity Tester Dudley LeRoux 169,001 13 *
Simple Servo Controller 225,418 22 *
Simple Touch Switch NEW! 173,650 6 *
Simple Two Speed Contactor DC Motor Controller 208,974 21 *
Stepper Motor Controller 755,185 120 *
Time Delay Relay 560,373 88
Time Delay Relay II jawaharlal@excite.com 251,408 39 *
Touch Switch 293,860 51 *
Video Activated Relay 125,138 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,522 10 *
Water Detector With Sump/Bilge Pump Controller 156,649 18 *
Wire Loop Alarm Alex Meaden 209,128 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 322,678 25 *
12VDC To 120VAC Inverter 1,543,284 691
6V to 12V Converter 533,449 121
Automatic 12V Lead Acid Battery Charger 943,241 248
Automatic Load Sensing Power Switch 171,336 16 *
Car Battery Charger 888,694 159 *
Dual Polarity Power Supply 375,867 84 *
Fixed Voltage Power Supply 315,913 52 *
High Current Power Supply 345,397 66 *
High Voltage High Current Power Supply 268,311 35 *
LASER Power Supply 301,050 28
Portable CD Player Adapter For Car 216,027 12 *
Power Supply 744,687 259 *
Solid State Tesla Coil NEW! 151,136 4
Solid State Tesla Coil/High Voltage Generator 450,505 51
Transformerless Power Supply 468,009 117 *
Voltage Inverter 345,989 51 *
Voltage Inverter II 207,775 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,187 182
3 Watt FM Transmitter Rae XL Tkacik 341,840 83 *
50 Watt Amplifier 513,678 74
8 Note Tune Player 144,356 12 *
8 Watt Audio Amp 379,235 67 *
Aircraft Radio Communications Receiver 284,480 50 *
Crystal Radio 163,500 53 *
Digital Volume Control 343,466 47 *
Electronic Stethoscope 326,809 142 *
FET Audio Mixer 348,412 41
FM Transmitter 1,018,391 420
Guitar Fuzz Effect 252,450 54 *
Microphone Mixer Anatoly I. Shikhatov 255,053 26 *
Mono To Stereo Synthesizer oRbEq 138,512 18 *
One Tube Regenerative Radio NEW! 151,119 4 *
Op Amp Radio 395,519 80 *
Single Chip AM Radio NEW! 103,826 4 *
Single Chip FM Radio NEW! 177,532 1 *
Sound Level Meter 346,612 51 *
Stereo Tube Amplifier Weslee Kinsler 272,882 15 *
Tone Control 314,558 31
Transistor Organ 204,464 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 166,981 27 *
FM Telephone Bug 238,516 57
Phone Busy Indicator 217,439 24 *
Remote Telephone Ringer 121,465 3 *
Ringing Phone Light Flasher 223,174 35 *
Simple Phone Tap Derek Tombrello 387,361 98 *
Telephone Hold Button 132,486 10
Telephone Recorder 220,324 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.