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
Friday, December 12, 2025		 AC Motor Speed Controller33
7 Segment LED Counter32
Yesterday
Thursday, December 11, 2025		 12VDC To 120VAC Inverter52
12V To 24V DC-DC Converter38
Of All Time 12VDC To 120VAC Inverter1,557,413
FM Transmitter1,029,364

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 235,102 61 *
Car Alarm Arming Horn Beep Canceller bob 143,866 6 *
Wireless Auto Tachometer 352,261 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 167,008 29 *
Parallel (Printer) Port Interface 297,927 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 458,216 63 *
3 Channel Spectrum Analyzer 232,265 20
40W Fluorescent Lamp Inverter Bart Milnes 338,757 60 *
Adjustable Strobe Light 319,539 36
Black Light 293,956 29
Colour (Sound) Organ 301,393 36
Electronic Dice NEW! 198,193 10 *
Fantastic Atom Expander 210,663 25
Flash Slave Trigger 230,564 18 *
Infa-Red Remote Control 649,135 216 *
IR Remote Extender NEW! 141,638 3 *
IR Remote Jammer Carl 276,449 110 *
IR Remote Switch NEW! 166,038 9 *
LASER Transmitter/Receiver 428,490 92
LED Chaser 457,899 83 *
LED Metronome NEW! 107,814 3 *
LED Thermometer 214,890 22 *
Light/Dark Detector 314,289 90 *
Simple Colour Organ 145,265 11 *
Strobe Light 284,167 27 *
TRIAC Light Dimmer 564,463 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 370,521 122 *
Electromagnetic Levitator NEW! 152,564 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 936,748 214 *
AC Motor Speed Controller 405,341 29 *
Air Flow Detector 260,382 54 *
Digital Keypad Combination Lock 210,260 20
Low Voltage Alarm 238,239 58 *
Pine Racecar Victory Judge 110,123 1 *
Pulse Width Modulation DC Motor Control 666,712 94
Rain Detector 314,128 112 *
Simple Lie Detector 576,129 323
Simple Polarity Tester Dudley LeRoux 174,197 13 *
Simple Servo Controller 230,957 22 *
Simple Touch Switch NEW! 179,069 6 *
Simple Two Speed Contactor DC Motor Controller 214,458 21 *
Stepper Motor Controller 765,150 120 *
Time Delay Relay 566,390 88
Time Delay Relay II jawaharlal@excite.com 256,741 39 *
Touch Switch 299,351 51 *
Video Activated Relay 129,756 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 191,196 10 *
Water Detector With Sump/Bilge Pump Controller 161,440 18 *
Wire Loop Alarm Alex Meaden 213,900 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! 331,290 25 *
12VDC To 120VAC Inverter 1,557,413 691
6V to 12V Converter 540,286 121
Automatic 12V Lead Acid Battery Charger 950,346 248
Automatic Load Sensing Power Switch 176,504 16 *
Car Battery Charger 895,554 159 *
Dual Polarity Power Supply 382,370 84 *
Fixed Voltage Power Supply 321,113 52 *
High Current Power Supply 352,330 66 *
High Voltage High Current Power Supply 273,872 35 *
LASER Power Supply 306,627 28
Portable CD Player Adapter For Car 221,138 12 *
Power Supply 750,966 259 *
Solid State Tesla Coil NEW! 157,548 4
Solid State Tesla Coil/High Voltage Generator 458,052 51
Transformerless Power Supply 473,968 117 *
Voltage Inverter 354,192 51 *
Voltage Inverter II 213,098 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 595,955 182
3 Watt FM Transmitter Rae XL Tkacik 349,643 83 *
50 Watt Amplifier 520,363 74
8 Note Tune Player 149,027 12 *
8 Watt Audio Amp 386,538 67 *
Aircraft Radio Communications Receiver 291,192 50 *
Crystal Radio 170,149 53 *
Digital Volume Control 349,937 47 *
Electronic Stethoscope 332,991 142 *
FET Audio Mixer 354,079 41
FM Transmitter 1,029,364 420
Guitar Fuzz Effect 259,169 54 *
Microphone Mixer Anatoly I. Shikhatov 260,508 26 *
Mono To Stereo Synthesizer oRbEq 144,172 18 *
One Tube Regenerative Radio NEW! 160,640 4 *
Op Amp Radio 402,463 80 *
Single Chip AM Radio NEW! 108,820 4 *
Single Chip FM Radio NEW! 183,870 1 *
Sound Level Meter 352,438 51 *
Stereo Tube Amplifier Weslee Kinsler 278,974 15 *
Tone Control 320,663 31
Transistor Organ 210,164 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 171,426 27 *
FM Telephone Bug 242,840 57
Phone Busy Indicator 222,177 24 *
Remote Telephone Ringer 125,751 3 *
Ringing Phone Light Flasher 229,156 35 *
Simple Phone Tap Derek Tombrello 392,230 98 *
Telephone Hold Button 136,892 10
Telephone Recorder 224,790 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.