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, November 06, 2025		 Sound Level Meter6
FM Transmitter6
Yesterday
Wednesday, November 05, 2025		 12VDC To 120VAC Inverter59
12V To 24V DC-DC Converter46
Of All Time 12VDC To 120VAC Inverter1,555,630
FM Transmitter1,027,842

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 234,607 61 *
Car Alarm Arming Horn Beep Canceller bob 143,350 6 *
Wireless Auto Tachometer 351,667 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 166,609 29 *
Parallel (Printer) Port Interface 297,153 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 457,498 63 *
3 Channel Spectrum Analyzer 231,619 20
40W Fluorescent Lamp Inverter Bart Milnes 338,172 60 *
Adjustable Strobe Light 318,949 36
Black Light 293,209 29
Colour (Sound) Organ 300,686 36
Electronic Dice NEW! 197,572 10 *
Fantastic Atom Expander 210,117 25
Flash Slave Trigger 229,947 18 *
Infa-Red Remote Control 648,319 216 *
IR Remote Extender NEW! 141,056 3 *
IR Remote Jammer Carl 275,816 110 *
IR Remote Switch NEW! 165,384 9 *
LASER Transmitter/Receiver 427,798 92
LED Chaser 457,141 83 *
LED Metronome NEW! 107,240 3 *
LED Thermometer 214,397 22 *
Light/Dark Detector 313,761 90 *
Simple Colour Organ 144,714 11 *
Strobe Light 283,654 27 *
TRIAC Light Dimmer 563,745 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 369,870 122 *
Electromagnetic Levitator NEW! 152,055 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 935,492 214 *
AC Motor Speed Controller 404,463 29 *
Air Flow Detector 259,818 54 *
Digital Keypad Combination Lock 209,706 20
Low Voltage Alarm 237,601 58 *
Pine Racecar Victory Judge 109,655 1 *
Pulse Width Modulation DC Motor Control 665,988 94
Rain Detector 313,455 112 *
Simple Lie Detector 575,454 323
Simple Polarity Tester Dudley LeRoux 173,472 13 *
Simple Servo Controller 230,400 22 *
Simple Touch Switch NEW! 178,427 6 *
Simple Two Speed Contactor DC Motor Controller 213,832 21 *
Stepper Motor Controller 764,029 120 *
Time Delay Relay 565,770 88
Time Delay Relay II jawaharlal@excite.com 256,045 39 *
Touch Switch 298,759 51 *
Video Activated Relay 129,192 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 190,335 10 *
Water Detector With Sump/Bilge Pump Controller 160,804 18 *
Wire Loop Alarm Alex Meaden 213,432 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! 330,144 25 *
12VDC To 120VAC Inverter 1,555,630 691
6V to 12V Converter 539,462 121
Automatic 12V Lead Acid Battery Charger 949,492 248
Automatic Load Sensing Power Switch 175,897 16 *
Car Battery Charger 894,764 159 *
Dual Polarity Power Supply 381,459 84 *
Fixed Voltage Power Supply 320,493 52 *
High Current Power Supply 351,438 66 *
High Voltage High Current Power Supply 273,243 35 *
LASER Power Supply 306,004 28
Portable CD Player Adapter For Car 220,453 12 *
Power Supply 750,268 259 *
Solid State Tesla Coil NEW! 156,707 4
Solid State Tesla Coil/High Voltage Generator 457,150 51
Transformerless Power Supply 473,212 117 *
Voltage Inverter 353,241 51 *
Voltage Inverter II 212,444 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 595,312 182
3 Watt FM Transmitter Rae XL Tkacik 348,784 83 *
50 Watt Amplifier 519,623 74
8 Note Tune Player 148,453 12 *
8 Watt Audio Amp 385,759 67 *
Aircraft Radio Communications Receiver 290,461 50 *
Crystal Radio 169,343 53 *
Digital Volume Control 349,161 47 *
Electronic Stethoscope 332,282 142 *
FET Audio Mixer 353,490 41
FM Transmitter 1,027,842 420
Guitar Fuzz Effect 258,294 54 *
Microphone Mixer Anatoly I. Shikhatov 259,912 26 *
Mono To Stereo Synthesizer oRbEq 143,473 18 *
One Tube Regenerative Radio NEW! 159,538 4 *
Op Amp Radio 401,728 80 *
Single Chip AM Radio NEW! 108,251 4 *
Single Chip FM Radio NEW! 183,138 1 *
Sound Level Meter 351,784 51 *
Stereo Tube Amplifier Weslee Kinsler 278,147 15 *
Tone Control 319,951 31
Transistor Organ 209,553 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,908 27 *
FM Telephone Bug 242,433 57
Phone Busy Indicator 221,654 24 *
Remote Telephone Ringer 125,234 3 *
Ringing Phone Light Flasher 228,487 35 *
Simple Phone Tap Derek Tombrello 391,707 98 *
Telephone Hold Button 136,486 10
Telephone Recorder 224,295 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.