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, May 06, 2025		 Stepper Motor Controller30
Single Chip AM Radio23
Yesterday
Monday, May 05, 2025		 12VDC To 120VAC Inverter52
7 Segment LED Counter37
Of All Time 12VDC To 120VAC Inverter1,546,267
FM Transmitter1,020,260

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 230,934 61 *
Car Alarm Arming Horn Beep Canceller bob 140,161 6 *
Wireless Auto Tachometer 347,717 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 163,512 29 *
Parallel (Printer) Port Interface 292,371 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 453,241 63 *
3 Channel Spectrum Analyzer 227,411 20
40W Fluorescent Lamp Inverter Bart Milnes 334,454 60 *
Adjustable Strobe Light 314,449 36
Black Light 287,923 29
Colour (Sound) Organ 296,118 36
Electronic Dice NEW! 193,599 10 *
Fantastic Atom Expander 206,829 25
Flash Slave Trigger 226,048 18 *
Infa-Red Remote Control 642,959 216 *
IR Remote Extender NEW! 137,315 3 *
IR Remote Jammer Carl 271,683 110 *
IR Remote Switch NEW! 161,611 9 *
LASER Transmitter/Receiver 423,151 92
LED Chaser 452,186 83 *
LED Metronome NEW! 103,613 3 *
LED Thermometer 210,991 22 *
Light/Dark Detector 310,214 90 *
Simple Colour Organ 141,219 11 *
Strobe Light 280,081 27 *
TRIAC Light Dimmer 559,343 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 365,589 122 *
Electromagnetic Levitator NEW! 148,544 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 929,908 214 *
AC Motor Speed Controller 398,975 29 *
Air Flow Detector 256,282 54 *
Digital Keypad Combination Lock 206,197 20
Low Voltage Alarm 233,702 58 *
Pine Racecar Victory Judge 106,419 1 *
Pulse Width Modulation DC Motor Control 661,196 94
Rain Detector 309,699 112 *
Simple Lie Detector 570,672 323
Simple Polarity Tester Dudley LeRoux 169,740 13 *
Simple Servo Controller 226,343 22 *
Simple Touch Switch NEW! 174,496 6 *
Simple Two Speed Contactor DC Motor Controller 209,828 21 *
Stepper Motor Controller 757,049 120 *
Time Delay Relay 561,446 88
Time Delay Relay II jawaharlal@excite.com 252,185 39 *
Touch Switch 294,770 51 *
Video Activated Relay 125,817 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 186,335 10 *
Water Detector With Sump/Bilge Pump Controller 157,361 18 *
Wire Loop Alarm Alex Meaden 209,878 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 324,037 25 *
12VDC To 120VAC Inverter 1,546,267 691
6V to 12V Converter 534,678 121
Automatic 12V Lead Acid Battery Charger 944,472 248
Automatic Load Sensing Power Switch 172,149 16 *
Car Battery Charger 889,805 159 *
Dual Polarity Power Supply 376,853 84 *
Fixed Voltage Power Supply 316,704 52 *
High Current Power Supply 346,518 66 *
High Voltage High Current Power Supply 269,196 35 *
LASER Power Supply 302,014 28
Portable CD Player Adapter For Car 216,811 12 *
Power Supply 745,848 259 *
Solid State Tesla Coil NEW! 152,158 4
Solid State Tesla Coil/High Voltage Generator 451,812 51
Transformerless Power Supply 468,992 117 *
Voltage Inverter 347,504 51 *
Voltage Inverter II 208,713 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 591,136 182
3 Watt FM Transmitter Rae XL Tkacik 343,147 83 *
50 Watt Amplifier 514,741 74
8 Note Tune Player 145,072 12 *
8 Watt Audio Amp 380,356 67 *
Aircraft Radio Communications Receiver 285,723 50 *
Crystal Radio 164,554 53 *
Digital Volume Control 344,384 47 *
Electronic Stethoscope 327,797 142 *
FET Audio Mixer 349,453 41
FM Transmitter 1,020,260 420
Guitar Fuzz Effect 253,649 54 *
Microphone Mixer Anatoly I. Shikhatov 255,974 26 *
Mono To Stereo Synthesizer oRbEq 139,411 18 *
One Tube Regenerative Radio NEW! 152,866 4 *
Op Amp Radio 396,782 80 *
Single Chip AM Radio NEW! 104,630 4 *
Single Chip FM Radio NEW! 178,603 1 *
Sound Level Meter 347,597 51 *
Stereo Tube Amplifier Weslee Kinsler 273,825 15 *
Tone Control 315,490 31
Transistor Organ 205,504 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 167,659 27 *
FM Telephone Bug 239,232 57
Phone Busy Indicator 218,238 24 *
Remote Telephone Ringer 122,102 3 *
Ringing Phone Light Flasher 224,144 35 *
Simple Phone Tap Derek Tombrello 388,209 98 *
Telephone Hold Button 133,201 10
Telephone Recorder 221,059 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.