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
Saturday, October 24, 2026		 Op Amp Radio21
12V To 24V DC-DC Converter21
Yesterday
Friday, October 23, 2026		 12VDC To 120VAC Inverter49
FM Transmitter47
Of All Time 12VDC To 120VAC Inverter1,570,584
FM Transmitter1,039,490

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,297 61 *
Car Alarm Arming Horn Beep Canceller bob 147,744 6 *
Wireless Auto Tachometer 357,104 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 170,903 29 *
Parallel (Printer) Port Interface 303,932 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,917 63 *
3 Channel Spectrum Analyzer 237,657 20
40W Fluorescent Lamp Inverter Bart Milnes 343,382 60 *
Adjustable Strobe Light 324,812 36
Black Light 300,147 29
Colour (Sound) Organ 307,247 36
Electronic Dice NEW! 203,158 10 *
Fantastic Atom Expander 215,015 25
Flash Slave Trigger 235,899 18 *
Infa-Red Remote Control 655,397 216 *
IR Remote Extender NEW! 146,528 3 *
IR Remote Jammer Carl 281,826 110 *
IR Remote Switch NEW! 170,676 9 *
LASER Transmitter/Receiver 433,991 92
LED Chaser 464,204 83 *
LED Metronome NEW! 112,508 3 *
LED Thermometer 219,041 22 *
Light/Dark Detector 318,656 90 *
Simple Colour Organ 149,586 11 *
Strobe Light 288,761 27 *
TRIAC Light Dimmer 571,090 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,814 122 *
Electromagnetic Levitator NEW! 156,889 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,558 214 *
AC Motor Speed Controller 411,395 29 *
Air Flow Detector 265,196 54 *
Digital Keypad Combination Lock 214,591 20
Low Voltage Alarm 243,051 58 *
Pine Racecar Victory Judge 114,286 1 *
Pulse Width Modulation DC Motor Control 672,709 94
Rain Detector 319,094 112 *
Simple Lie Detector 581,543 323
Simple Polarity Tester Dudley LeRoux 179,010 13 *
Simple Servo Controller 236,004 22 *
Simple Touch Switch NEW! 184,054 6 *
Simple Two Speed Contactor DC Motor Controller 219,465 21 *
Stepper Motor Controller 772,833 120 *
Time Delay Relay 572,065 88
Time Delay Relay II jawaharlal@excite.com 261,435 39 *
Touch Switch 304,420 51 *
Video Activated Relay 134,043 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,672 10 *
Water Detector With Sump/Bilge Pump Controller 166,089 18 *
Wire Loop Alarm Alex Meaden 218,397 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! 338,992 25 *
12VDC To 120VAC Inverter 1,570,584 691
6V to 12V Converter 546,751 121
Automatic 12V Lead Acid Battery Charger 957,801 248
Automatic Load Sensing Power Switch 181,301 16 *
Car Battery Charger 901,410 159 *
Dual Polarity Power Supply 387,870 84 *
Fixed Voltage Power Supply 325,324 52 *
High Current Power Supply 357,886 66 *
High Voltage High Current Power Supply 278,536 35 *
LASER Power Supply 311,644 28
Portable CD Player Adapter For Car 225,832 12 *
Power Supply 756,896 259 *
Solid State Tesla Coil NEW! 163,467 4
Solid State Tesla Coil/High Voltage Generator 465,525 51
Transformerless Power Supply 478,793 117 *
Voltage Inverter 360,601 51 *
Voltage Inverter II 217,785 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,717 182
3 Watt FM Transmitter Rae XL Tkacik 355,891 83 *
50 Watt Amplifier 525,680 74
8 Note Tune Player 153,179 12 *
8 Watt Audio Amp 392,870 67 *
Aircraft Radio Communications Receiver 297,005 50 *
Crystal Radio 176,032 53 *
Digital Volume Control 355,100 47 *
Electronic Stethoscope 338,891 142 *
FET Audio Mixer 358,920 41
FM Transmitter 1,039,490 420
Guitar Fuzz Effect 264,971 54 *
Microphone Mixer Anatoly I. Shikhatov 265,207 26 *
Mono To Stereo Synthesizer oRbEq 149,147 18 *
One Tube Regenerative Radio NEW! 167,656 4 *
Op Amp Radio 408,298 80 *
Single Chip AM Radio NEW! 113,600 4 *
Single Chip FM Radio NEW! 189,780 1 *
Sound Level Meter 357,545 51 *
Stereo Tube Amplifier Weslee Kinsler 284,059 15 *
Tone Control 325,935 31
Transistor Organ 215,585 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,394 27 *
FM Telephone Bug 247,004 57
Phone Busy Indicator 226,679 24 *
Remote Telephone Ringer 129,844 3 *
Ringing Phone Light Flasher 234,719 35 *
Simple Phone Tap Derek Tombrello 396,575 98 *
Telephone Hold Button 140,769 10
Telephone Recorder 229,073 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.