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		 7 Segment LED Counter18
Power Supply18
Yesterday
Wednesday, January 14, 2026		 12VDC To 120VAC Inverter55
FM Transmitter37
Of All Time 12VDC To 120VAC Inverter1,558,973
FM Transmitter1,030,399

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 235,598 61 *
Car Alarm Arming Horn Beep Canceller bob 144,319 6 *
Wireless Auto Tachometer 352,846 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 167,406 29 *
Parallel (Printer) Port Interface 298,606 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 458,781 63 *
3 Channel Spectrum Analyzer 232,853 20
40W Fluorescent Lamp Inverter Bart Milnes 339,336 60 *
Adjustable Strobe Light 320,096 36
Black Light 294,658 29
Colour (Sound) Organ 302,071 36
Electronic Dice NEW! 198,744 10 *
Fantastic Atom Expander 211,157 25
Flash Slave Trigger 231,158 18 *
Infa-Red Remote Control 649,749 216 *
IR Remote Extender NEW! 142,222 3 *
IR Remote Jammer Carl 277,069 110 *
IR Remote Switch NEW! 166,555 9 *
LASER Transmitter/Receiver 429,077 92
LED Chaser 458,658 83 *
LED Metronome NEW! 108,319 3 *
LED Thermometer 215,319 22 *
Light/Dark Detector 314,780 90 *
Simple Colour Organ 145,732 11 *
Strobe Light 284,673 27 *
TRIAC Light Dimmer 565,122 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 371,096 122 *
Electromagnetic Levitator NEW! 153,063 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 937,786 214 *
AC Motor Speed Controller 406,111 29 *
Air Flow Detector 260,941 54 *
Digital Keypad Combination Lock 210,788 20
Low Voltage Alarm 238,853 58 *
Pine Racecar Victory Judge 110,573 1 *
Pulse Width Modulation DC Motor Control 667,432 94
Rain Detector 314,664 112 *
Simple Lie Detector 576,847 323
Simple Polarity Tester Dudley LeRoux 174,760 13 *
Simple Servo Controller 231,592 22 *
Simple Touch Switch NEW! 179,712 6 *
Simple Two Speed Contactor DC Motor Controller 215,006 21 *
Stepper Motor Controller 766,007 120 *
Time Delay Relay 567,043 88
Time Delay Relay II jawaharlal@excite.com 257,328 39 *
Touch Switch 299,945 51 *
Video Activated Relay 130,209 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 191,915 10 *
Water Detector With Sump/Bilge Pump Controller 162,054 18 *
Wire Loop Alarm Alex Meaden 214,390 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! 332,159 25 *
12VDC To 120VAC Inverter 1,558,973 691
6V to 12V Converter 541,036 121
Automatic 12V Lead Acid Battery Charger 951,256 248
Automatic Load Sensing Power Switch 177,039 16 *
Car Battery Charger 896,249 159 *
Dual Polarity Power Supply 383,091 84 *
Fixed Voltage Power Supply 321,608 52 *
High Current Power Supply 353,072 66 *
High Voltage High Current Power Supply 274,492 35 *
LASER Power Supply 307,173 28
Portable CD Player Adapter For Car 221,707 12 *
Power Supply 751,656 259 *
Solid State Tesla Coil NEW! 158,351 4
Solid State Tesla Coil/High Voltage Generator 458,959 51
Transformerless Power Supply 474,631 117 *
Voltage Inverter 354,982 51 *
Voltage Inverter II 213,661 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 596,590 182
3 Watt FM Transmitter Rae XL Tkacik 350,438 83 *
50 Watt Amplifier 521,019 74
8 Note Tune Player 149,572 12 *
8 Watt Audio Amp 387,265 67 *
Aircraft Radio Communications Receiver 291,957 50 *
Crystal Radio 170,936 53 *
Digital Volume Control 350,608 47 *
Electronic Stethoscope 333,602 142 *
FET Audio Mixer 354,639 41
FM Transmitter 1,030,399 420
Guitar Fuzz Effect 259,888 54 *
Microphone Mixer Anatoly I. Shikhatov 261,065 26 *
Mono To Stereo Synthesizer oRbEq 144,758 18 *
One Tube Regenerative Radio NEW! 161,538 4 *
Op Amp Radio 403,095 80 *
Single Chip AM Radio NEW! 109,396 4 *
Single Chip FM Radio NEW! 184,652 1 *
Sound Level Meter 353,025 51 *
Stereo Tube Amplifier Weslee Kinsler 279,720 15 *
Tone Control 321,357 31
Transistor Organ 210,771 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,907 27 *
FM Telephone Bug 243,298 57
Phone Busy Indicator 222,659 24 *
Remote Telephone Ringer 126,304 3 *
Ringing Phone Light Flasher 229,826 35 *
Simple Phone Tap Derek Tombrello 392,762 98 *
Telephone Hold Button 137,365 10
Telephone Recorder 225,260 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.