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, August 31, 2016
12VDC To 120VAC Inverter96
Automatic 12V Lead Acid Battery Charger78
Yesterday
Tuesday, August 30, 2016
Automatic 12V Lead Acid Battery Charger107
12VDC To 120VAC Inverter89
Of All Time 12VDC To 120VAC Inverter1,352,469
FM Transmitter903,674

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 179,463 61 *
Car Alarm Arming Horn Beep Canceller bob 93,271 6 *
Wireless Auto Tachometer 285,465 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 123,362 29 *
Parallel (Printer) Port Interface 225,445 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 376,374 62 *
3 Channel Spectrum Analyzer 170,632 20
40W Fluorescent Lamp Inverter Bart Milnes 277,164 60 *
Adjustable Strobe Light 248,306 36
Black Light 211,070 29
Colour (Sound) Organ 233,668 35
Electronic Dice NEW! 139,107 8 *
Fantastic Atom Expander 148,371 25
Flash Slave Trigger 170,916 17 *
Infa-Red Remote Control 563,624 216 *
IR Remote Extender NEW! 79,899 2 *
IR Remote Jammer Carl 211,610 110 *
IR Remote Switch NEW! 110,932 9 *
LASER Transmitter/Receiver 347,127 91
LED Chaser 390,793 83 *
LED Metronome NEW! 71,868 3 *
LED Thermometer 164,564 22 *
Light/Dark Detector 258,961 89 *
Simple Colour Organ 102,057 10 *
Strobe Light 232,004 27 *
TRIAC Light Dimmer 437,400 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 300,434 122 *
Electromagnetic Levitator NEW! 100,244 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 830,729 214 *
AC Motor Speed Controller 316,927 29 *
Air Flow Detector 206,571 54 *
Digital Keypad Combination Lock 152,382 20
Low Voltage Alarm 178,541 58 *
Pine Racecar Victory Judge 67,133 1 *
Pulse Width Modulation DC Motor Control 589,415 93
Rain Detector 259,663 112 *
Simple Lie Detector 498,869 323
Simple Polarity Tester Dudley LeRoux 116,456 13 *
Simple Servo Controller 172,329 22 *
Simple Touch Switch NEW! 127,625 5 *
Simple Two Speed Contactor DC Motor Controller 164,957 21 *
Stepper Motor Controller 649,283 120 *
Time Delay Relay 490,161 86
Time Delay Relay II jawaharlal@excite.com 192,516 39 *
Touch Switch 243,857 51 *
Video Activated Relay 84,074 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 134,997 10 *
Water Detector With Sump/Bilge Pump Controller 110,426 18 *
Wire Loop Alarm Alex Meaden 166,393 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 246,399 25 *
12VDC To 120VAC Inverter 1,352,469 686
6V to 12V Converter 423,295 121
Automatic 12V Lead Acid Battery Charger 831,773 243
Automatic Load Sensing Power Switch 121,311 15 *
Car Battery Charger 792,518 159 *
Dual Polarity Power Supply 284,716 84 *
Fixed Voltage Power Supply 263,966 52 *
High Current Power Supply 279,602 64 *
High Voltage High Current Power Supply 209,220 35 *
LASER Power Supply 236,596 28
Portable CD Player Adapter For Car 165,296 12 *
Power Supply 659,601 259 *
Solid State Tesla Coil NEW! 104,664 3
Solid State Tesla Coil/High Voltage Generator 362,408 49
Transformerless Power Supply 401,642 116 *
Voltage Inverter 288,008 51 *
Voltage Inverter II 164,270 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 524,190 182
3 Watt FM Transmitter Rae XL Tkacik 279,641 81 *
50 Watt Amplifier 439,496 74
8 Note Tune Player 105,443 12 *
8 Watt Audio Amp 309,663 67 *
Aircraft Radio Communications Receiver 215,485 49 *
Crystal Radio 125,920 53 *
Digital Volume Control 281,128 46 *
Electronic Stethoscope 254,406 141 *
FET Audio Mixer 284,910 40
FM Transmitter 903,674 418
Guitar Fuzz Effect 190,820 52 *
Microphone Mixer Anatoly I. Shikhatov 198,949 25 *
Mono To Stereo Synthesizer oRbEq 88,005 17 *
One Tube Regenerative Radio NEW! 90,485 4 *
Op Amp Radio 322,915 80 *
Single Chip AM Radio NEW! 70,468 2 *
Single Chip FM Radio NEW! 117,587 0 *
Sound Level Meter 290,004 51 *
Stereo Tube Amplifier Weslee Kinsler 220,039 15 *
Tone Control 251,468 31
Transistor Organ 150,631 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 128,541 27 *
FM Telephone Bug 191,679 57
Phone Busy Indicator 164,757 24 *
Remote Telephone Ringer 85,170 3 *
Ringing Phone Light Flasher 167,666 33 *
Simple Phone Tap Derek Tombrello 318,641 98 *
Telephone Hold Button 87,504 9
Telephone Recorder 171,926 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.