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
Wednesday, March 25, 2026		 12VDC To 120VAC Inverter29
Rain Detector28
Yesterday
Tuesday, March 24, 2026		 12VDC To 120VAC Inverter60
Stepper Motor Controller43
Of All Time 12VDC To 120VAC Inverter1,561,924
FM Transmitter1,032,653

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,520 61 *
Car Alarm Arming Horn Beep Canceller bob 145,177 6 *
Wireless Auto Tachometer 354,038 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 168,190 29 *
Parallel (Printer) Port Interface 299,826 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 459,976 63 *
3 Channel Spectrum Analyzer 233,935 20
40W Fluorescent Lamp Inverter Bart Milnes 340,422 60 *
Adjustable Strobe Light 321,207 36
Black Light 295,982 29
Colour (Sound) Organ 303,354 36
Electronic Dice NEW! 199,755 10 *
Fantastic Atom Expander 212,052 25
Flash Slave Trigger 232,288 18 *
Infa-Red Remote Control 650,969 216 *
IR Remote Extender NEW! 143,267 3 *
IR Remote Jammer Carl 278,130 110 *
IR Remote Switch NEW! 167,528 9 *
LASER Transmitter/Receiver 430,412 92
LED Chaser 460,023 83 *
LED Metronome NEW! 109,278 3 *
LED Thermometer 216,220 22 *
Light/Dark Detector 315,758 90 *
Simple Colour Organ 146,553 11 *
Strobe Light 285,568 27 *
TRIAC Light Dimmer 566,566 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,703 122 *
Electromagnetic Levitator NEW! 154,033 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 939,460 214 *
AC Motor Speed Controller 407,461 29 *
Air Flow Detector 261,955 54 *
Digital Keypad Combination Lock 211,725 20
Low Voltage Alarm 239,859 58 *
Pine Racecar Victory Judge 111,423 1 *
Pulse Width Modulation DC Motor Control 668,744 94
Rain Detector 315,770 112 *
Simple Lie Detector 578,059 323
Simple Polarity Tester Dudley LeRoux 175,793 13 *
Simple Servo Controller 232,647 22 *
Simple Touch Switch NEW! 180,806 6 *
Simple Two Speed Contactor DC Motor Controller 216,060 21 *
Stepper Motor Controller 767,787 120 *
Time Delay Relay 568,231 88
Time Delay Relay II jawaharlal@excite.com 258,355 39 *
Touch Switch 301,002 51 *
Video Activated Relay 130,994 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 193,191 10 *
Water Detector With Sump/Bilge Pump Controller 163,151 18 *
Wire Loop Alarm Alex Meaden 215,285 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! 334,121 25 *
12VDC To 120VAC Inverter 1,561,924 691
6V to 12V Converter 542,423 121
Automatic 12V Lead Acid Battery Charger 952,962 248
Automatic Load Sensing Power Switch 178,114 16 *
Car Battery Charger 897,647 159 *
Dual Polarity Power Supply 384,347 84 *
Fixed Voltage Power Supply 322,586 52 *
High Current Power Supply 354,376 66 *
High Voltage High Current Power Supply 275,708 35 *
LASER Power Supply 308,249 28
Portable CD Player Adapter For Car 222,707 12 *
Power Supply 752,958 259 *
Solid State Tesla Coil NEW! 159,813 4
Solid State Tesla Coil/High Voltage Generator 460,544 51
Transformerless Power Supply 475,750 117 *
Voltage Inverter 356,395 51 *
Voltage Inverter II 214,738 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,751 182
3 Watt FM Transmitter Rae XL Tkacik 351,833 83 *
50 Watt Amplifier 522,353 74
8 Note Tune Player 150,487 12 *
8 Watt Audio Amp 388,714 67 *
Aircraft Radio Communications Receiver 293,330 50 *
Crystal Radio 172,369 53 *
Digital Volume Control 351,804 47 *
Electronic Stethoscope 334,848 142 *
FET Audio Mixer 355,733 41
FM Transmitter 1,032,653 420
Guitar Fuzz Effect 261,230 54 *
Microphone Mixer Anatoly I. Shikhatov 262,205 26 *
Mono To Stereo Synthesizer oRbEq 145,889 18 *
One Tube Regenerative Radio NEW! 163,173 4 *
Op Amp Radio 404,458 80 *
Single Chip AM Radio NEW! 110,507 4 *
Single Chip FM Radio NEW! 185,856 1 *
Sound Level Meter 354,262 51 *
Stereo Tube Amplifier Weslee Kinsler 281,010 15 *
Tone Control 322,635 31
Transistor Organ 211,942 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,780 27 *
FM Telephone Bug 244,211 57
Phone Busy Indicator 223,683 24 *
Remote Telephone Ringer 127,292 3 *
Ringing Phone Light Flasher 231,199 35 *
Simple Phone Tap Derek Tombrello 393,836 98 *
Telephone Hold Button 138,294 10
Telephone Recorder 226,168 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.