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 01, 2025		 Voltage Inverter30
Transistor Organ30
Yesterday
Monday, March 31, 2025		 12VDC To 120VAC Inverter32
FM Transmitter28
Of All Time 12VDC To 120VAC Inverter1,544,580
FM Transmitter1,019,291

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,549 61 *
Car Alarm Arming Horn Beep Canceller bob 139,809 6 *
Wireless Auto Tachometer 347,257 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,184 29 *
Parallel (Printer) Port Interface 291,822 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 452,736 63 *
3 Channel Spectrum Analyzer 226,851 20
40W Fluorescent Lamp Inverter Bart Milnes 334,052 60 *
Adjustable Strobe Light 313,925 36
Black Light 287,282 29
Colour (Sound) Organ 295,654 36
Electronic Dice NEW! 193,158 10 *
Fantastic Atom Expander 206,448 25
Flash Slave Trigger 225,619 18 *
Infa-Red Remote Control 642,393 216 *
IR Remote Extender NEW! 136,880 3 *
IR Remote Jammer Carl 271,123 110 *
IR Remote Switch NEW! 161,205 9 *
LASER Transmitter/Receiver 422,562 92
LED Chaser 451,654 83 *
LED Metronome NEW! 103,212 3 *
LED Thermometer 210,619 22 *
Light/Dark Detector 309,838 90 *
Simple Colour Organ 140,858 11 *
Strobe Light 279,657 27 *
TRIAC Light Dimmer 558,807 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,095 122 *
Electromagnetic Levitator NEW! 148,175 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,131 214 *
AC Motor Speed Controller 398,357 29 *
Air Flow Detector 255,883 54 *
Digital Keypad Combination Lock 205,843 20
Low Voltage Alarm 233,298 58 *
Pine Racecar Victory Judge 106,068 1 *
Pulse Width Modulation DC Motor Control 660,645 94
Rain Detector 309,218 112 *
Simple Lie Detector 570,106 323
Simple Polarity Tester Dudley LeRoux 169,367 13 *
Simple Servo Controller 225,839 22 *
Simple Touch Switch NEW! 174,071 6 *
Simple Two Speed Contactor DC Motor Controller 209,390 21 *
Stepper Motor Controller 756,066 120 *
Time Delay Relay 560,885 88
Time Delay Relay II jawaharlal@excite.com 251,799 39 *
Touch Switch 294,288 51 *
Video Activated Relay 125,480 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 185,915 10 *
Water Detector With Sump/Bilge Pump Controller 157,007 18 *
Wire Loop Alarm Alex Meaden 209,486 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 323,358 25 *
12VDC To 120VAC Inverter 1,544,580 691
6V to 12V Converter 534,057 121
Automatic 12V Lead Acid Battery Charger 943,844 248
Automatic Load Sensing Power Switch 171,748 16 *
Car Battery Charger 889,209 159 *
Dual Polarity Power Supply 376,329 84 *
Fixed Voltage Power Supply 316,276 52 *
High Current Power Supply 345,912 66 *
High Voltage High Current Power Supply 268,724 35 *
LASER Power Supply 301,531 28
Portable CD Player Adapter For Car 216,421 12 *
Power Supply 745,208 259 *
Solid State Tesla Coil NEW! 151,637 4
Solid State Tesla Coil/High Voltage Generator 451,112 51
Transformerless Power Supply 468,440 117 *
Voltage Inverter 346,717 51 *
Voltage Inverter II 208,196 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 590,626 182
3 Watt FM Transmitter Rae XL Tkacik 342,519 83 *
50 Watt Amplifier 514,174 74
8 Note Tune Player 144,693 12 *
8 Watt Audio Amp 379,764 67 *
Aircraft Radio Communications Receiver 285,126 50 *
Crystal Radio 164,014 53 *
Digital Volume Control 343,919 47 *
Electronic Stethoscope 327,292 142 *
FET Audio Mixer 348,895 41
FM Transmitter 1,019,291 420
Guitar Fuzz Effect 253,019 54 *
Microphone Mixer Anatoly I. Shikhatov 255,500 26 *
Mono To Stereo Synthesizer oRbEq 138,975 18 *
One Tube Regenerative Radio NEW! 152,001 4 *
Op Amp Radio 396,130 80 *
Single Chip AM Radio NEW! 104,199 4 *
Single Chip FM Radio NEW! 178,050 1 *
Sound Level Meter 347,076 51 *
Stereo Tube Amplifier Weslee Kinsler 273,367 15 *
Tone Control 315,012 31
Transistor Organ 204,957 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,305 27 *
FM Telephone Bug 238,872 57
Phone Busy Indicator 217,829 24 *
Remote Telephone Ringer 121,777 3 *
Ringing Phone Light Flasher 223,657 35 *
Simple Phone Tap Derek Tombrello 387,791 98 *
Telephone Hold Button 132,832 10
Telephone Recorder 220,661 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.