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
Tuesday, June 24, 2025		 FM Transmitter26
8 Watt Audio Amp23
Yesterday
Monday, June 23, 2025		 12VDC To 120VAC Inverter61
FM Transmitter46
Of All Time 12VDC To 120VAC Inverter1,549,316
FM Transmitter1,022,784

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 232,419 61 *
Car Alarm Arming Horn Beep Canceller bob 141,502 6 *
Wireless Auto Tachometer 349,228 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 164,828 29 *
Parallel (Printer) Port Interface 294,002 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 454,807 63 *
3 Channel Spectrum Analyzer 229,022 20
40W Fluorescent Lamp Inverter Bart Milnes 335,875 60 *
Adjustable Strobe Light 316,239 36
Black Light 290,126 29
Colour (Sound) Organ 297,757 36
Electronic Dice NEW! 195,128 10 *
Fantastic Atom Expander 208,150 25
Flash Slave Trigger 227,531 18 *
Infa-Red Remote Control 645,070 216 *
IR Remote Extender NEW! 138,751 3 *
IR Remote Jammer Carl 273,209 110 *
IR Remote Switch NEW! 163,111 9 *
LASER Transmitter/Receiver 424,954 92
LED Chaser 453,945 83 *
LED Metronome NEW! 105,036 3 *
LED Thermometer 212,329 22 *
Light/Dark Detector 311,582 90 *
Simple Colour Organ 142,613 11 *
Strobe Light 281,495 27 *
TRIAC Light Dimmer 560,975 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 367,131 122 *
Electromagnetic Levitator NEW! 149,963 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 931,976 214 *
AC Motor Speed Controller 400,758 29 *
Air Flow Detector 257,615 54 *
Digital Keypad Combination Lock 207,490 20
Low Voltage Alarm 235,142 58 *
Pine Racecar Victory Judge 107,705 1 *
Pulse Width Modulation DC Motor Control 662,821 94
Rain Detector 311,157 112 *
Simple Lie Detector 572,342 323
Simple Polarity Tester Dudley LeRoux 171,122 13 *
Simple Servo Controller 227,856 22 *
Simple Touch Switch NEW! 175,964 6 *
Simple Two Speed Contactor DC Motor Controller 211,389 21 *
Stepper Motor Controller 759,534 120 *
Time Delay Relay 563,041 88
Time Delay Relay II jawaharlal@excite.com 253,620 39 *
Touch Switch 296,239 51 *
Video Activated Relay 127,132 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 187,739 10 *
Water Detector With Sump/Bilge Pump Controller 158,658 18 *
Wire Loop Alarm Alex Meaden 211,252 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! 325,821 25 *
12VDC To 120VAC Inverter 1,549,316 691
6V to 12V Converter 536,342 121
Automatic 12V Lead Acid Battery Charger 946,289 248
Automatic Load Sensing Power Switch 173,536 16 *
Car Battery Charger 891,521 159 *
Dual Polarity Power Supply 378,468 84 *
Fixed Voltage Power Supply 318,117 52 *
High Current Power Supply 348,176 66 *
High Voltage High Current Power Supply 270,721 35 *
LASER Power Supply 303,503 28
Portable CD Player Adapter For Car 218,211 12 *
Power Supply 747,459 259 *
Solid State Tesla Coil NEW! 153,745 4
Solid State Tesla Coil/High Voltage Generator 453,712 51
Transformerless Power Supply 470,543 117 *
Voltage Inverter 349,358 51 *
Voltage Inverter II 210,115 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 592,692 182
3 Watt FM Transmitter Rae XL Tkacik 344,962 83 *
50 Watt Amplifier 516,466 74
8 Note Tune Player 146,486 12 *
8 Watt Audio Amp 382,156 67 *
Aircraft Radio Communications Receiver 287,504 50 *
Crystal Radio 166,188 53 *
Digital Volume Control 346,448 47 *
Electronic Stethoscope 329,406 142 *
FET Audio Mixer 351,069 41
FM Transmitter 1,022,784 420
Guitar Fuzz Effect 255,310 54 *
Microphone Mixer Anatoly I. Shikhatov 257,452 26 *
Mono To Stereo Synthesizer oRbEq 141,001 18 *
One Tube Regenerative Radio NEW! 155,184 4 *
Op Amp Radio 398,585 80 *
Single Chip AM Radio NEW! 106,074 4 *
Single Chip FM Radio NEW! 180,191 1 *
Sound Level Meter 349,199 51 *
Stereo Tube Amplifier Weslee Kinsler 275,307 15 *
Tone Control 317,132 31
Transistor Organ 207,068 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 168,966 27 *
FM Telephone Bug 240,536 57
Phone Busy Indicator 219,643 24 *
Remote Telephone Ringer 123,441 3 *
Ringing Phone Light Flasher 225,701 35 *
Simple Phone Tap Derek Tombrello 389,612 98 *
Telephone Hold Button 134,598 10
Telephone Recorder 222,392 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.