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, May 02, 2025		 12VDC To 120VAC Inverter15
FM Transmitter12
Yesterday
Thursday, May 01, 2025		 12VDC To 120VAC Inverter40
One Tube Regenerative Radio28
Of All Time 12VDC To 120VAC Inverter1,546,067
FM Transmitter1,020,138

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,872 61 *
Car Alarm Arming Horn Beep Canceller bob 140,100 6 *
Wireless Auto Tachometer 347,636 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,465 29 *
Parallel (Printer) Port Interface 292,298 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,169 63 *
3 Channel Spectrum Analyzer 227,337 20
40W Fluorescent Lamp Inverter Bart Milnes 334,390 60 *
Adjustable Strobe Light 314,384 36
Black Light 287,824 29
Colour (Sound) Organ 296,052 36
Electronic Dice NEW! 193,523 10 *
Fantastic Atom Expander 206,770 25
Flash Slave Trigger 225,985 18 *
Infa-Red Remote Control 642,885 216 *
IR Remote Extender NEW! 137,253 3 *
IR Remote Jammer Carl 271,593 110 *
IR Remote Switch NEW! 161,543 9 *
LASER Transmitter/Receiver 423,072 92
LED Chaser 452,103 83 *
LED Metronome NEW! 103,548 3 *
LED Thermometer 210,933 22 *
Light/Dark Detector 310,160 90 *
Simple Colour Organ 141,166 11 *
Strobe Light 280,032 27 *
TRIAC Light Dimmer 559,262 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,520 122 *
Electromagnetic Levitator NEW! 148,499 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,758 214 *
AC Motor Speed Controller 398,887 29 *
Air Flow Detector 256,212 54 *
Digital Keypad Combination Lock 206,142 20
Low Voltage Alarm 233,633 58 *
Pine Racecar Victory Judge 106,369 1 *
Pulse Width Modulation DC Motor Control 661,107 94
Rain Detector 309,632 112 *
Simple Lie Detector 570,591 323
Simple Polarity Tester Dudley LeRoux 169,677 13 *
Simple Servo Controller 226,278 22 *
Simple Touch Switch NEW! 174,430 6 *
Simple Two Speed Contactor DC Motor Controller 209,771 21 *
Stepper Motor Controller 756,906 120 *
Time Delay Relay 561,370 88
Time Delay Relay II jawaharlal@excite.com 252,135 39 *
Touch Switch 294,698 51 *
Video Activated Relay 125,764 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,274 10 *
Water Detector With Sump/Bilge Pump Controller 157,315 18 *
Wire Loop Alarm Alex Meaden 209,825 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,932 25 *
12VDC To 120VAC Inverter 1,546,067 691
6V to 12V Converter 534,571 121
Automatic 12V Lead Acid Battery Charger 944,381 248
Automatic Load Sensing Power Switch 172,077 16 *
Car Battery Charger 889,722 159 *
Dual Polarity Power Supply 376,769 84 *
Fixed Voltage Power Supply 316,638 52 *
High Current Power Supply 346,430 66 *
High Voltage High Current Power Supply 269,121 35 *
LASER Power Supply 301,950 28
Portable CD Player Adapter For Car 216,756 12 *
Power Supply 745,762 259 *
Solid State Tesla Coil NEW! 152,083 4
Solid State Tesla Coil/High Voltage Generator 451,728 51
Transformerless Power Supply 468,907 117 *
Voltage Inverter 347,392 51 *
Voltage Inverter II 208,630 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,078 182
3 Watt FM Transmitter Rae XL Tkacik 343,061 83 *
50 Watt Amplifier 514,657 74
8 Note Tune Player 145,023 12 *
8 Watt Audio Amp 380,269 67 *
Aircraft Radio Communications Receiver 285,625 50 *
Crystal Radio 164,480 53 *
Digital Volume Control 344,319 47 *
Electronic Stethoscope 327,717 142 *
FET Audio Mixer 349,372 41
FM Transmitter 1,020,138 420
Guitar Fuzz Effect 253,551 54 *
Microphone Mixer Anatoly I. Shikhatov 255,909 26 *
Mono To Stereo Synthesizer oRbEq 139,358 18 *
One Tube Regenerative Radio NEW! 152,737 4 *
Op Amp Radio 396,693 80 *
Single Chip AM Radio NEW! 104,553 4 *
Single Chip FM Radio NEW! 178,534 1 *
Sound Level Meter 347,521 51 *
Stereo Tube Amplifier Weslee Kinsler 273,760 15 *
Tone Control 315,415 31
Transistor Organ 205,433 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,594 27 *
FM Telephone Bug 239,180 57
Phone Busy Indicator 218,167 24 *
Remote Telephone Ringer 122,048 3 *
Ringing Phone Light Flasher 224,071 35 *
Simple Phone Tap Derek Tombrello 388,144 98 *
Telephone Hold Button 133,145 10
Telephone Recorder 221,008 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.