Electronic Circuits

Home > Electronics > Electronic Circuits Buy Me A Coffee

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
Sunday, July 13, 2025		 FM Transmitter10
Car Battery Charger8
Yesterday
Saturday, July 12, 2025		 12V To 24V DC-DC Converter34
Stepper Motor Controller32
Of All Time 12VDC To 120VAC Inverter1,550,293
FM Transmitter1,023,508

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 232,678 61 *
Car Alarm Arming Horn Beep Canceller bob 141,691 6 *
Wireless Auto Tachometer 349,521 58

Computer

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 165,041 29 *
Parallel (Printer) Port Interface 294,371 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 455,125 63 *
3 Channel Spectrum Analyzer 229,336 20
40W Fluorescent Lamp Inverter Bart Milnes 336,191 60 *
Adjustable Strobe Light 316,567 36
Black Light 290,493 29
Colour (Sound) Organ 298,089 36
Electronic Dice NEW! 195,414 10 *
Fantastic Atom Expander 208,347 25
Flash Slave Trigger 227,846 18 *
Infa-Red Remote Control 645,672 216 *
IR Remote Extender NEW! 139,024 3 *
IR Remote Jammer Carl 273,515 110 *
IR Remote Switch NEW! 163,386 9 *
LASER Transmitter/Receiver 425,322 92
LED Chaser 454,332 83 *
LED Metronome NEW! 105,282 3 *
LED Thermometer 212,560 22 *
Light/Dark Detector 311,808 90 *
Simple Colour Organ 142,847 11 *
Strobe Light 281,713 27 *
TRIAC Light Dimmer 561,308 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 367,425 122 *
Electromagnetic Levitator NEW! 150,197 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 932,391 214 *
AC Motor Speed Controller 401,224 29 *
Air Flow Detector 257,915 54 *
Digital Keypad Combination Lock 207,739 20
Low Voltage Alarm 235,446 58 *
Pine Racecar Victory Judge 107,918 1 *
Pulse Width Modulation DC Motor Control 663,204 94
Rain Detector 311,438 112 *
Simple Lie Detector 572,752 323
Simple Polarity Tester Dudley LeRoux 171,380 13 *
Simple Servo Controller 228,183 22 *
Simple Touch Switch NEW! 176,246 6 *
Simple Two Speed Contactor DC Motor Controller 211,696 21 *
Stepper Motor Controller 760,125 120 *
Time Delay Relay 563,416 88
Time Delay Relay II jawaharlal@excite.com 253,929 39 *
Touch Switch 296,605 51 *
Video Activated Relay 127,404 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 188,104 10 *
Water Detector With Sump/Bilge Pump Controller 158,934 18 *
Wire Loop Alarm Alex Meaden 211,525 27 *

Power Supply

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 326,278 25 *
12VDC To 120VAC Inverter 1,550,293 691
6V to 12V Converter 536,767 121
Automatic 12V Lead Acid Battery Charger 946,761 248
Automatic Load Sensing Power Switch 173,837 16 *
Car Battery Charger 892,018 159 *
Dual Polarity Power Supply 378,893 84 *
Fixed Voltage Power Supply 318,463 52 *
High Current Power Supply 348,573 66 *
High Voltage High Current Power Supply 271,079 35 *
LASER Power Supply 303,855 28
Portable CD Player Adapter For Car 218,507 12 *
Power Supply 747,798 259 *
Solid State Tesla Coil NEW! 154,134 4
Solid State Tesla Coil/High Voltage Generator 454,190 51
Transformerless Power Supply 470,901 117 *
Voltage Inverter 349,918 51 *
Voltage Inverter II 210,437 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 593,039 182
3 Watt FM Transmitter Rae XL Tkacik 345,438 83 *
50 Watt Amplifier 516,956 74
8 Note Tune Player 146,748 12 *
8 Watt Audio Amp 382,652 67 *
Aircraft Radio Communications Receiver 287,866 50 *
Crystal Radio 166,565 53 *
Digital Volume Control 346,825 47 *
Electronic Stethoscope 329,754 142 *
FET Audio Mixer 351,363 41
FM Transmitter 1,023,508 420
Guitar Fuzz Effect 255,669 54 *
Microphone Mixer Anatoly I. Shikhatov 257,763 26 *
Mono To Stereo Synthesizer oRbEq 141,324 18 *
One Tube Regenerative Radio NEW! 155,734 4 *
Op Amp Radio 399,052 80 *
Single Chip AM Radio NEW! 106,332 4 *
Single Chip FM Radio NEW! 180,564 1 *
Sound Level Meter 349,549 51 *
Stereo Tube Amplifier Weslee Kinsler 275,617 15 *
Tone Control 317,527 31
Transistor Organ 207,392 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,199 27 *
FM Telephone Bug 240,745 57
Phone Busy Indicator 219,913 24 *
Remote Telephone Ringer 123,652 3 *
Ringing Phone Light Flasher 226,012 35 *
Simple Phone Tap Derek Tombrello 389,874 98 *
Telephone Hold Button 134,877 10
Telephone Recorder 222,597 55 *

Back To Electronics Page | Mail Me | Search | Buy Me A Coffee

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.