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, May 18, 2022
Digital Keypad Combination Lock9
Automatic 12V Lead Acid Battery Charger9
Yesterday
Tuesday, May 17, 2022
Solid State Tesla Coil/High Voltage Generator43
12VDC To 120VAC Inverter32
Of All Time 12VDC To 120VAC Inverter1,501,069
FM Transmitter991,459

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 221,210 61 *
Car Alarm Arming Horn Beep Canceller bob 131,420 6 *
Wireless Auto Tachometer 336,178 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 154,987 29 *
Parallel (Printer) Port Interface 277,654 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 439,636 63 *
3 Channel Spectrum Analyzer 214,501 20
40W Fluorescent Lamp Inverter Bart Milnes 323,843 60 *
Adjustable Strobe Light 301,400 36
Black Light 269,384 29
Colour (Sound) Organ 283,047 36
Electronic Dice NEW! 182,883 10 *
Fantastic Atom Expander 197,515 25
Flash Slave Trigger 214,288 18 *
Infa-Red Remote Control 626,278 216 *
IR Remote Extender NEW! 126,017 2 *
IR Remote Jammer Carl 258,188 110 *
IR Remote Switch NEW! 152,392 9 *
LASER Transmitter/Receiver 405,279 92
LED Chaser 437,711 83 *
LED Metronome NEW! 94,691 3 *
LED Thermometer 201,397 22 *
Light/Dark Detector 300,694 90 *
Simple Colour Organ 132,732 10 *
Strobe Light 268,947 27 *
TRIAC Light Dimmer 543,127 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 352,691 122 *
Electromagnetic Levitator NEW! 138,672 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 913,048 214 *
AC Motor Speed Controller 380,030 29 *
Air Flow Detector 246,016 54 *
Digital Keypad Combination Lock 191,304 20
Low Voltage Alarm 223,474 58 *
Pine Racecar Victory Judge 98,350 1 *
Pulse Width Modulation DC Motor Control 641,141 94
Rain Detector 298,920 112 *
Simple Lie Detector 553,561 323
Simple Polarity Tester Dudley LeRoux 159,708 13 *
Simple Servo Controller 215,381 22 *
Simple Touch Switch NEW! 163,950 5 *
Simple Two Speed Contactor DC Motor Controller 199,253 21 *
Stepper Motor Controller 735,116 120 *
Time Delay Relay 548,744 88
Time Delay Relay II jawaharlal@excite.com 239,220 39 *
Touch Switch 283,660 51 *
Video Activated Relay 116,694 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 174,104 10 *
Water Detector With Sump/Bilge Pump Controller 147,304 18 *
Wire Loop Alarm Alex Meaden 200,439 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 306,006 25 *
12VDC To 120VAC Inverter 1,501,069 689
6V to 12V Converter 517,540 121
Automatic 12V Lead Acid Battery Charger 925,970 248
Automatic Load Sensing Power Switch 161,161 16 *
Car Battery Charger 873,219 159 *
Dual Polarity Power Supply 363,765 84 *
Fixed Voltage Power Supply 304,121 52 *
High Current Power Supply 329,464 66 *
High Voltage High Current Power Supply 246,533 35 *
LASER Power Supply 288,278 28
Portable CD Player Adapter For Car 205,942 12 *
Power Supply 729,041 259 *
Solid State Tesla Coil NEW! 139,132 4
Solid State Tesla Coil/High Voltage Generator 433,894 51
Transformerless Power Supply 455,850 117 *
Voltage Inverter 330,101 51 *
Voltage Inverter II 195,508 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 577,952 182
3 Watt FM Transmitter Rae XL Tkacik 326,425 83 *
50 Watt Amplifier 499,440 74
8 Note Tune Player 135,824 12 *
8 Watt Audio Amp 364,307 67 *
Aircraft Radio Communications Receiver 269,358 49 *
Crystal Radio 153,759 53 *
Digital Volume Control 325,992 47 *
Electronic Stethoscope 306,858 142 *
FET Audio Mixer 336,140 41
FM Transmitter 991,459 420
Guitar Fuzz Effect 239,223 54 *
Microphone Mixer Anatoly I. Shikhatov 243,970 26 *
Mono To Stereo Synthesizer oRbEq 127,078 18 *
One Tube Regenerative Radio NEW! 129,853 4 *
Op Amp Radio 378,510 80 *
Single Chip AM Radio NEW! 94,575 2 *
Single Chip FM Radio NEW! 164,798 1 *
Sound Level Meter 334,588 51 *
Stereo Tube Amplifier Weslee Kinsler 261,424 15 *
Tone Control 302,534 31
Transistor Organ 192,427 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 158,738 27 *
FM Telephone Bug 230,841 57
Phone Busy Indicator 208,930 24 *
Remote Telephone Ringer 113,739 3 *
Ringing Phone Light Flasher 209,909 35 *
Simple Phone Tap Derek Tombrello 378,323 98 *
Telephone Hold Button 123,841 10
Telephone Recorder 211,249 54 *


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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.