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, December 25, 2025		 Automatic Load Sensing Power Switch19
Car Battery Charger15
Yesterday
Wednesday, December 24, 2025		 12VDC To 120VAC Inverter54
Solid State Tesla Coil/High Voltage Generator40
Of All Time 12VDC To 120VAC Inverter1,557,922
FM Transmitter1,029,722

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 235,265 61 *
Car Alarm Arming Horn Beep Canceller bob 144,033 6 *
Wireless Auto Tachometer 352,454 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 167,146 29 *
Parallel (Printer) Port Interface 298,185 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 458,411 63 *
3 Channel Spectrum Analyzer 232,455 20
40W Fluorescent Lamp Inverter Bart Milnes 338,946 60 *
Adjustable Strobe Light 319,743 36
Black Light 294,187 29
Colour (Sound) Organ 301,620 36
Electronic Dice NEW! 198,378 10 *
Fantastic Atom Expander 210,823 25
Flash Slave Trigger 230,761 18 *
Infa-Red Remote Control 649,361 216 *
IR Remote Extender NEW! 141,833 3 *
IR Remote Jammer Carl 276,686 110 *
IR Remote Switch NEW! 166,210 9 *
LASER Transmitter/Receiver 428,693 92
LED Chaser 458,178 83 *
LED Metronome NEW! 107,993 3 *
LED Thermometer 215,035 22 *
Light/Dark Detector 314,465 90 *
Simple Colour Organ 145,447 11 *
Strobe Light 284,343 27 *
TRIAC Light Dimmer 564,696 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 370,735 122 *
Electromagnetic Levitator NEW! 152,737 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 937,167 214 *
AC Motor Speed Controller 405,633 29 *
Air Flow Detector 260,584 54 *
Digital Keypad Combination Lock 210,427 20
Low Voltage Alarm 238,461 58 *
Pine Racecar Victory Judge 110,270 1 *
Pulse Width Modulation DC Motor Control 666,950 94
Rain Detector 314,327 112 *
Simple Lie Detector 576,352 323
Simple Polarity Tester Dudley LeRoux 174,391 13 *
Simple Servo Controller 231,175 22 *
Simple Touch Switch NEW! 179,280 6 *
Simple Two Speed Contactor DC Motor Controller 214,643 21 *
Stepper Motor Controller 765,460 120 *
Time Delay Relay 566,644 88
Time Delay Relay II jawaharlal@excite.com 256,936 39 *
Touch Switch 299,571 51 *
Video Activated Relay 129,912 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 191,444 10 *
Water Detector With Sump/Bilge Pump Controller 161,651 18 *
Wire Loop Alarm Alex Meaden 214,079 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! 331,592 25 *
12VDC To 120VAC Inverter 1,557,922 691
6V to 12V Converter 540,538 121
Automatic 12V Lead Acid Battery Charger 950,657 248
Automatic Load Sensing Power Switch 176,687 16 *
Car Battery Charger 895,806 159 *
Dual Polarity Power Supply 382,640 84 *
Fixed Voltage Power Supply 321,307 52 *
High Current Power Supply 352,567 66 *
High Voltage High Current Power Supply 274,059 35 *
LASER Power Supply 306,808 28
Portable CD Player Adapter For Car 221,357 12 *
Power Supply 751,213 259 *
Solid State Tesla Coil NEW! 157,842 4
Solid State Tesla Coil/High Voltage Generator 458,393 51
Transformerless Power Supply 474,229 117 *
Voltage Inverter 354,476 51 *
Voltage Inverter II 213,295 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 596,162 182
3 Watt FM Transmitter Rae XL Tkacik 349,944 83 *
50 Watt Amplifier 520,594 74
8 Note Tune Player 149,194 12 *
8 Watt Audio Amp 386,778 67 *
Aircraft Radio Communications Receiver 291,480 50 *
Crystal Radio 170,437 53 *
Digital Volume Control 350,154 47 *
Electronic Stethoscope 333,205 142 *
FET Audio Mixer 354,276 41
FM Transmitter 1,029,722 420
Guitar Fuzz Effect 259,421 54 *
Microphone Mixer Anatoly I. Shikhatov 260,703 26 *
Mono To Stereo Synthesizer oRbEq 144,383 18 *
One Tube Regenerative Radio NEW! 160,973 4 *
Op Amp Radio 402,697 80 *
Single Chip AM Radio NEW! 109,022 4 *
Single Chip FM Radio NEW! 184,153 1 *
Sound Level Meter 352,629 51 *
Stereo Tube Amplifier Weslee Kinsler 279,218 15 *
Tone Control 320,904 31
Transistor Organ 210,370 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,599 27 *
FM Telephone Bug 243,003 57
Phone Busy Indicator 222,352 24 *
Remote Telephone Ringer 125,944 3 *
Ringing Phone Light Flasher 229,390 35 *
Simple Phone Tap Derek Tombrello 392,413 98 *
Telephone Hold Button 137,039 10
Telephone Recorder 224,937 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.