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
Monday, March 30, 2026		 12V To 24V DC-DC Converter7
Transformerless Power Supply7
Yesterday
Sunday, March 29, 2026		 12VDC To 120VAC Inverter24
Stepper Motor Controller21
Of All Time 12VDC To 120VAC Inverter1,562,104
FM Transmitter1,032,785

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 236,572 61 *
Car Alarm Arming Horn Beep Canceller bob 145,219 6 *
Wireless Auto Tachometer 354,103 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 168,234 29 *
Parallel (Printer) Port Interface 299,913 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 460,045 63 *
3 Channel Spectrum Analyzer 234,008 20
40W Fluorescent Lamp Inverter Bart Milnes 340,500 60 *
Adjustable Strobe Light 321,296 36
Black Light 296,074 29
Colour (Sound) Organ 303,455 36
Electronic Dice NEW! 199,843 10 *
Fantastic Atom Expander 212,128 25
Flash Slave Trigger 232,364 18 *
Infa-Red Remote Control 651,044 216 *
IR Remote Extender NEW! 143,336 3 *
IR Remote Jammer Carl 278,216 110 *
IR Remote Switch NEW! 167,596 9 *
LASER Transmitter/Receiver 430,499 92
LED Chaser 460,111 83 *
LED Metronome NEW! 109,344 3 *
LED Thermometer 216,292 22 *
Light/Dark Detector 315,818 90 *
Simple Colour Organ 146,626 11 *
Strobe Light 285,627 27 *
TRIAC Light Dimmer 566,651 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 372,772 122 *
Electromagnetic Levitator NEW! 154,097 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 939,564 214 *
AC Motor Speed Controller 407,540 29 *
Air Flow Detector 262,018 54 *
Digital Keypad Combination Lock 211,780 20
Low Voltage Alarm 239,919 58 *
Pine Racecar Victory Judge 111,467 1 *
Pulse Width Modulation DC Motor Control 668,816 94
Rain Detector 315,845 112 *
Simple Lie Detector 578,143 323
Simple Polarity Tester Dudley LeRoux 175,863 13 *
Simple Servo Controller 232,706 22 *
Simple Touch Switch NEW! 180,872 6 *
Simple Two Speed Contactor DC Motor Controller 216,132 21 *
Stepper Motor Controller 767,888 120 *
Time Delay Relay 568,323 88
Time Delay Relay II jawaharlal@excite.com 258,416 39 *
Touch Switch 301,060 51 *
Video Activated Relay 131,039 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 193,256 10 *
Water Detector With Sump/Bilge Pump Controller 163,209 18 *
Wire Loop Alarm Alex Meaden 215,341 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! 334,238 25 *
12VDC To 120VAC Inverter 1,562,104 691
6V to 12V Converter 542,520 121
Automatic 12V Lead Acid Battery Charger 953,069 248
Automatic Load Sensing Power Switch 178,174 16 *
Car Battery Charger 897,715 159 *
Dual Polarity Power Supply 384,421 84 *
Fixed Voltage Power Supply 322,646 52 *
High Current Power Supply 354,468 66 *
High Voltage High Current Power Supply 275,774 35 *
LASER Power Supply 308,309 28
Portable CD Player Adapter For Car 222,769 12 *
Power Supply 753,037 259 *
Solid State Tesla Coil NEW! 159,897 4
Solid State Tesla Coil/High Voltage Generator 460,657 51
Transformerless Power Supply 475,810 117 *
Voltage Inverter 356,485 51 *
Voltage Inverter II 214,804 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 597,824 182
3 Watt FM Transmitter Rae XL Tkacik 351,910 83 *
50 Watt Amplifier 522,439 74
8 Note Tune Player 150,531 12 *
8 Watt Audio Amp 388,810 67 *
Aircraft Radio Communications Receiver 293,420 50 *
Crystal Radio 172,437 53 *
Digital Volume Control 351,866 47 *
Electronic Stethoscope 334,921 142 *
FET Audio Mixer 355,792 41
FM Transmitter 1,032,785 420
Guitar Fuzz Effect 261,316 54 *
Microphone Mixer Anatoly I. Shikhatov 262,273 26 *
Mono To Stereo Synthesizer oRbEq 145,977 18 *
One Tube Regenerative Radio NEW! 163,259 4 *
Op Amp Radio 404,528 80 *
Single Chip AM Radio NEW! 110,558 4 *
Single Chip FM Radio NEW! 185,948 1 *
Sound Level Meter 354,333 51 *
Stereo Tube Amplifier Weslee Kinsler 281,071 15 *
Tone Control 322,723 31
Transistor Organ 212,001 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 172,829 27 *
FM Telephone Bug 244,258 57
Phone Busy Indicator 223,730 24 *
Remote Telephone Ringer 127,349 3 *
Ringing Phone Light Flasher 231,273 35 *
Simple Phone Tap Derek Tombrello 393,890 98 *
Telephone Hold Button 138,348 10
Telephone Recorder 226,213 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.