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
Thursday, January 15, 2026		 12VDC To 120VAC Inverter40
7 Segment LED Counter30
Yesterday
Wednesday, January 14, 2026		 12VDC To 120VAC Inverter55
FM Transmitter37
Of All Time 12VDC To 120VAC Inverter1,558,998
FM Transmitter1,030,413

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 235,610 61 *
Car Alarm Arming Horn Beep Canceller bob 144,329 6 *
Wireless Auto Tachometer 352,852 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 167,411 29 *
Parallel (Printer) Port Interface 298,616 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 458,793 63 *
3 Channel Spectrum Analyzer 232,861 20
40W Fluorescent Lamp Inverter Bart Milnes 339,348 60 *
Adjustable Strobe Light 320,099 36
Black Light 294,666 29
Colour (Sound) Organ 302,074 36
Electronic Dice NEW! 198,746 10 *
Fantastic Atom Expander 211,168 25
Flash Slave Trigger 231,176 18 *
Infa-Red Remote Control 649,754 216 *
IR Remote Extender NEW! 142,228 3 *
IR Remote Jammer Carl 277,069 110 *
IR Remote Switch NEW! 166,559 9 *
LASER Transmitter/Receiver 429,084 92
LED Chaser 458,665 83 *
LED Metronome NEW! 108,322 3 *
LED Thermometer 215,329 22 *
Light/Dark Detector 314,788 90 *
Simple Colour Organ 145,740 11 *
Strobe Light 284,675 27 *
TRIAC Light Dimmer 565,137 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 371,106 122 *
Electromagnetic Levitator NEW! 153,065 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 937,798 214 *
AC Motor Speed Controller 406,118 29 *
Air Flow Detector 260,948 54 *
Digital Keypad Combination Lock 210,790 20
Low Voltage Alarm 238,856 58 *
Pine Racecar Victory Judge 110,577 1 *
Pulse Width Modulation DC Motor Control 667,445 94
Rain Detector 314,671 112 *
Simple Lie Detector 576,855 323
Simple Polarity Tester Dudley LeRoux 174,768 13 *
Simple Servo Controller 231,602 22 *
Simple Touch Switch NEW! 179,720 6 *
Simple Two Speed Contactor DC Motor Controller 215,012 21 *
Stepper Motor Controller 766,021 120 *
Time Delay Relay 567,052 88
Time Delay Relay II jawaharlal@excite.com 257,335 39 *
Touch Switch 299,947 51 *
Video Activated Relay 130,210 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 191,926 10 *
Water Detector With Sump/Bilge Pump Controller 162,062 18 *
Wire Loop Alarm Alex Meaden 214,397 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! 332,172 25 *
12VDC To 120VAC Inverter 1,558,998 691
6V to 12V Converter 541,045 121
Automatic 12V Lead Acid Battery Charger 951,264 248
Automatic Load Sensing Power Switch 177,049 16 *
Car Battery Charger 896,264 159 *
Dual Polarity Power Supply 383,101 84 *
Fixed Voltage Power Supply 321,617 52 *
High Current Power Supply 353,082 66 *
High Voltage High Current Power Supply 274,502 35 *
LASER Power Supply 307,185 28
Portable CD Player Adapter For Car 221,712 12 *
Power Supply 751,663 259 *
Solid State Tesla Coil NEW! 158,360 4
Solid State Tesla Coil/High Voltage Generator 458,963 51
Transformerless Power Supply 474,637 117 *
Voltage Inverter 354,991 51 *
Voltage Inverter II 213,669 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 596,596 182
3 Watt FM Transmitter Rae XL Tkacik 350,443 83 *
50 Watt Amplifier 521,032 74
8 Note Tune Player 149,575 12 *
8 Watt Audio Amp 387,267 67 *
Aircraft Radio Communications Receiver 291,975 50 *
Crystal Radio 170,953 53 *
Digital Volume Control 350,619 47 *
Electronic Stethoscope 333,611 142 *
FET Audio Mixer 354,643 41
FM Transmitter 1,030,413 420
Guitar Fuzz Effect 259,898 54 *
Microphone Mixer Anatoly I. Shikhatov 261,082 26 *
Mono To Stereo Synthesizer oRbEq 144,764 18 *
One Tube Regenerative Radio NEW! 161,555 4 *
Op Amp Radio 403,101 80 *
Single Chip AM Radio NEW! 109,404 4 *
Single Chip FM Radio NEW! 184,658 1 *
Sound Level Meter 353,031 51 *
Stereo Tube Amplifier Weslee Kinsler 279,735 15 *
Tone Control 321,366 31
Transistor Organ 210,781 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,910 27 *
FM Telephone Bug 243,303 57
Phone Busy Indicator 222,665 24 *
Remote Telephone Ringer 126,309 3 *
Ringing Phone Light Flasher 229,839 35 *
Simple Phone Tap Derek Tombrello 392,765 98 *
Telephone Hold Button 137,370 10
Telephone Recorder 225,269 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.