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
Monday, November 17, 2025		 Pulse Width Modulation DC Motor Control19
Electronic Stethoscope19
Yesterday
Sunday, November 16, 2025		 12VDC To 120VAC Inverter41
FM Transmitter40
Of All Time 12VDC To 120VAC Inverter1,556,170
FM Transmitter1,028,371

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 234,791 61 *
Car Alarm Arming Horn Beep Canceller bob 143,553 6 *
Wireless Auto Tachometer 351,895 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 166,763 29 *
Parallel (Printer) Port Interface 297,437 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 457,816 63 *
3 Channel Spectrum Analyzer 231,874 20
40W Fluorescent Lamp Inverter Bart Milnes 338,410 60 *
Adjustable Strobe Light 319,168 36
Black Light 293,522 29
Colour (Sound) Organ 300,921 36
Electronic Dice NEW! 197,818 10 *
Fantastic Atom Expander 210,352 25
Flash Slave Trigger 230,164 18 *
Infa-Red Remote Control 648,669 216 *
IR Remote Extender NEW! 141,287 3 *
IR Remote Jammer Carl 276,063 110 *
IR Remote Switch NEW! 165,621 9 *
LASER Transmitter/Receiver 428,052 92
LED Chaser 457,365 83 *
LED Metronome NEW! 107,440 3 *
LED Thermometer 214,590 22 *
Light/Dark Detector 313,974 90 *
Simple Colour Organ 144,935 11 *
Strobe Light 283,849 27 *
TRIAC Light Dimmer 564,019 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 370,121 122 *
Electromagnetic Levitator NEW! 152,238 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 935,879 214 *
AC Motor Speed Controller 404,729 29 *
Air Flow Detector 260,013 54 *
Digital Keypad Combination Lock 209,899 20
Low Voltage Alarm 237,837 58 *
Pine Racecar Victory Judge 109,833 1 *
Pulse Width Modulation DC Motor Control 666,301 94
Rain Detector 313,723 112 *
Simple Lie Detector 575,710 323
Simple Polarity Tester Dudley LeRoux 173,792 13 *
Simple Servo Controller 230,590 22 *
Simple Touch Switch NEW! 178,622 6 *
Simple Two Speed Contactor DC Motor Controller 214,082 21 *
Stepper Motor Controller 764,444 120 *
Time Delay Relay 565,975 88
Time Delay Relay II jawaharlal@excite.com 256,344 39 *
Touch Switch 298,978 51 *
Video Activated Relay 129,442 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 190,698 10 *
Water Detector With Sump/Bilge Pump Controller 161,057 18 *
Wire Loop Alarm Alex Meaden 213,596 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! 330,581 25 *
12VDC To 120VAC Inverter 1,556,170 691
6V to 12V Converter 539,736 121
Automatic 12V Lead Acid Battery Charger 949,777 248
Automatic Load Sensing Power Switch 176,131 16 *
Car Battery Charger 895,010 159 *
Dual Polarity Power Supply 381,800 84 *
Fixed Voltage Power Supply 320,725 52 *
High Current Power Supply 351,780 66 *
High Voltage High Current Power Supply 273,454 35 *
LASER Power Supply 306,258 28
Portable CD Player Adapter For Car 220,713 12 *
Power Supply 750,505 259 *
Solid State Tesla Coil NEW! 156,968 4
Solid State Tesla Coil/High Voltage Generator 457,486 51
Transformerless Power Supply 473,536 117 *
Voltage Inverter 353,583 51 *
Voltage Inverter II 212,679 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 595,537 182
3 Watt FM Transmitter Rae XL Tkacik 349,057 83 *
50 Watt Amplifier 519,893 74
8 Note Tune Player 148,699 12 *
8 Watt Audio Amp 386,007 67 *
Aircraft Radio Communications Receiver 290,750 50 *
Crystal Radio 169,629 53 *
Digital Volume Control 349,464 47 *
Electronic Stethoscope 332,564 142 *
FET Audio Mixer 353,715 41
FM Transmitter 1,028,371 420
Guitar Fuzz Effect 258,652 54 *
Microphone Mixer Anatoly I. Shikhatov 260,128 26 *
Mono To Stereo Synthesizer oRbEq 143,783 18 *
One Tube Regenerative Radio NEW! 159,923 4 *
Op Amp Radio 401,983 80 *
Single Chip AM Radio NEW! 108,468 4 *
Single Chip FM Radio NEW! 183,409 1 *
Sound Level Meter 352,017 51 *
Stereo Tube Amplifier Weslee Kinsler 278,437 15 *
Tone Control 320,216 31
Transistor Organ 209,767 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,106 27 *
FM Telephone Bug 242,565 57
Phone Busy Indicator 221,834 24 *
Remote Telephone Ringer 125,370 3 *
Ringing Phone Light Flasher 228,705 35 *
Simple Phone Tap Derek Tombrello 391,886 98 *
Telephone Hold Button 136,610 10
Telephone Recorder 224,459 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.