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
Wednesday, January 07, 2026		 12VDC To 120VAC Inverter20
High Current Power Supply17
Yesterday
Tuesday, January 06, 2026		 12VDC To 120VAC Inverter45
Single Chip FM Radio37
Of All Time 12VDC To 120VAC Inverter1,558,475
FM Transmitter1,030,123

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 235,462 61 *
Car Alarm Arming Horn Beep Canceller bob 144,206 6 *
Wireless Auto Tachometer 352,678 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 167,302 29 *
Parallel (Printer) Port Interface 298,426 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 458,615 63 *
3 Channel Spectrum Analyzer 232,694 20
40W Fluorescent Lamp Inverter Bart Milnes 339,186 60 *
Adjustable Strobe Light 319,967 36
Black Light 294,470 29
Colour (Sound) Organ 301,881 36
Electronic Dice NEW! 198,589 10 *
Fantastic Atom Expander 211,009 25
Flash Slave Trigger 231,017 18 *
Infa-Red Remote Control 649,604 216 *
IR Remote Extender NEW! 142,067 3 *
IR Remote Jammer Carl 276,928 110 *
IR Remote Switch NEW! 166,426 9 *
LASER Transmitter/Receiver 428,926 92
LED Chaser 458,490 83 *
LED Metronome NEW! 108,187 3 *
LED Thermometer 215,212 22 *
Light/Dark Detector 314,657 90 *
Simple Colour Organ 145,608 11 *
Strobe Light 284,545 27 *
TRIAC Light Dimmer 564,951 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 370,945 122 *
Electromagnetic Levitator NEW! 152,948 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 937,560 214 *
AC Motor Speed Controller 405,928 29 *
Air Flow Detector 260,800 54 *
Digital Keypad Combination Lock 210,645 20
Low Voltage Alarm 238,683 58 *
Pine Racecar Victory Judge 110,436 1 *
Pulse Width Modulation DC Motor Control 667,242 94
Rain Detector 314,535 112 *
Simple Lie Detector 576,660 323
Simple Polarity Tester Dudley LeRoux 174,611 13 *
Simple Servo Controller 231,409 22 *
Simple Touch Switch NEW! 179,513 6 *
Simple Two Speed Contactor DC Motor Controller 214,851 21 *
Stepper Motor Controller 765,770 120 *
Time Delay Relay 566,889 88
Time Delay Relay II jawaharlal@excite.com 257,185 39 *
Touch Switch 299,809 51 *
Video Activated Relay 130,079 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 191,736 10 *
Water Detector With Sump/Bilge Pump Controller 161,904 18 *
Wire Loop Alarm Alex Meaden 214,275 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! 331,948 25 *
12VDC To 120VAC Inverter 1,558,475 691
6V to 12V Converter 540,837 121
Automatic 12V Lead Acid Battery Charger 951,001 248
Automatic Load Sensing Power Switch 176,903 16 *
Car Battery Charger 896,063 159 *
Dual Polarity Power Supply 382,912 84 *
Fixed Voltage Power Supply 321,479 52 *
High Current Power Supply 352,879 66 *
High Voltage High Current Power Supply 274,326 35 *
LASER Power Supply 307,017 28
Portable CD Player Adapter For Car 221,561 12 *
Power Supply 751,467 259 *
Solid State Tesla Coil NEW! 158,149 4
Solid State Tesla Coil/High Voltage Generator 458,713 51
Transformerless Power Supply 474,443 117 *
Voltage Inverter 354,771 51 *
Voltage Inverter II 213,504 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 596,428 182
3 Watt FM Transmitter Rae XL Tkacik 350,259 83 *
50 Watt Amplifier 520,863 74
8 Note Tune Player 149,412 12 *
8 Watt Audio Amp 387,079 67 *
Aircraft Radio Communications Receiver 291,778 50 *
Crystal Radio 170,753 53 *
Digital Volume Control 350,449 47 *
Electronic Stethoscope 333,463 142 *
FET Audio Mixer 354,489 41
FM Transmitter 1,030,123 420
Guitar Fuzz Effect 259,695 54 *
Microphone Mixer Anatoly I. Shikhatov 260,928 26 *
Mono To Stereo Synthesizer oRbEq 144,613 18 *
One Tube Regenerative Radio NEW! 161,319 4 *
Op Amp Radio 402,939 80 *
Single Chip AM Radio NEW! 109,258 4 *
Single Chip FM Radio NEW! 184,477 1 *
Sound Level Meter 352,876 51 *
Stereo Tube Amplifier Weslee Kinsler 279,533 15 *
Tone Control 321,185 31
Transistor Organ 210,612 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,787 27 *
FM Telephone Bug 243,174 57
Phone Busy Indicator 222,531 24 *
Remote Telephone Ringer 126,173 3 *
Ringing Phone Light Flasher 229,643 35 *
Simple Phone Tap Derek Tombrello 392,613 98 *
Telephone Hold Button 137,234 10
Telephone Recorder 225,135 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.