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, October 14, 2026		 12VDC To 120VAC Inverter26
Electronic Stethoscope11
Yesterday
Tuesday, October 13, 2026		 12VDC To 120VAC Inverter27
7 Segment LED Counter24
Of All Time 12VDC To 120VAC Inverter1,570,220
FM Transmitter1,039,194

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,167 61 *
Car Alarm Arming Horn Beep Canceller bob 147,636 6 *
Wireless Auto Tachometer 356,973 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 170,778 29 *
Parallel (Printer) Port Interface 303,777 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,749 63 *
3 Channel Spectrum Analyzer 237,482 20
40W Fluorescent Lamp Inverter Bart Milnes 343,236 60 *
Adjustable Strobe Light 324,643 36
Black Light 299,939 29
Colour (Sound) Organ 307,050 36
Electronic Dice NEW! 202,976 10 *
Fantastic Atom Expander 214,859 25
Flash Slave Trigger 235,733 18 *
Infa-Red Remote Control 655,218 216 *
IR Remote Extender NEW! 146,364 3 *
IR Remote Jammer Carl 281,678 110 *
IR Remote Switch NEW! 170,497 9 *
LASER Transmitter/Receiver 433,832 92
LED Chaser 464,025 83 *
LED Metronome NEW! 112,380 3 *
LED Thermometer 218,904 22 *
Light/Dark Detector 318,529 90 *
Simple Colour Organ 149,455 11 *
Strobe Light 288,605 27 *
TRIAC Light Dimmer 570,911 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,632 122 *
Electromagnetic Levitator NEW! 156,723 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,277 214 *
AC Motor Speed Controller 411,203 29 *
Air Flow Detector 265,050 54 *
Digital Keypad Combination Lock 214,460 20
Low Voltage Alarm 242,912 58 *
Pine Racecar Victory Judge 114,132 1 *
Pulse Width Modulation DC Motor Control 672,507 94
Rain Detector 318,943 112 *
Simple Lie Detector 581,336 323
Simple Polarity Tester Dudley LeRoux 178,845 13 *
Simple Servo Controller 235,847 22 *
Simple Touch Switch NEW! 183,903 6 *
Simple Two Speed Contactor DC Motor Controller 219,305 21 *
Stepper Motor Controller 772,615 120 *
Time Delay Relay 571,887 88
Time Delay Relay II jawaharlal@excite.com 261,301 39 *
Touch Switch 304,232 51 *
Video Activated Relay 133,885 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,496 10 *
Water Detector With Sump/Bilge Pump Controller 165,941 18 *
Wire Loop Alarm Alex Meaden 218,248 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! 338,778 25 *
12VDC To 120VAC Inverter 1,570,220 691
6V to 12V Converter 546,561 121
Automatic 12V Lead Acid Battery Charger 957,549 248
Automatic Load Sensing Power Switch 181,165 16 *
Car Battery Charger 901,230 159 *
Dual Polarity Power Supply 387,723 84 *
Fixed Voltage Power Supply 325,187 52 *
High Current Power Supply 357,725 66 *
High Voltage High Current Power Supply 278,399 35 *
LASER Power Supply 311,469 28
Portable CD Player Adapter For Car 225,671 12 *
Power Supply 756,704 259 *
Solid State Tesla Coil NEW! 163,295 4
Solid State Tesla Coil/High Voltage Generator 465,340 51
Transformerless Power Supply 478,638 117 *
Voltage Inverter 360,395 51 *
Voltage Inverter II 217,651 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,569 182
3 Watt FM Transmitter Rae XL Tkacik 355,742 83 *
50 Watt Amplifier 525,534 74
8 Note Tune Player 153,045 12 *
8 Watt Audio Amp 392,677 67 *
Aircraft Radio Communications Receiver 296,837 50 *
Crystal Radio 175,881 53 *
Digital Volume Control 354,928 47 *
Electronic Stethoscope 338,715 142 *
FET Audio Mixer 358,758 41
FM Transmitter 1,039,194 420
Guitar Fuzz Effect 264,812 54 *
Microphone Mixer Anatoly I. Shikhatov 265,058 26 *
Mono To Stereo Synthesizer oRbEq 148,978 18 *
One Tube Regenerative Radio NEW! 167,399 4 *
Op Amp Radio 408,102 80 *
Single Chip AM Radio NEW! 113,448 4 *
Single Chip FM Radio NEW! 189,599 1 *
Sound Level Meter 357,363 51 *
Stereo Tube Amplifier Weslee Kinsler 283,919 15 *
Tone Control 325,788 31
Transistor Organ 215,406 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,258 27 *
FM Telephone Bug 246,867 57
Phone Busy Indicator 226,524 24 *
Remote Telephone Ringer 129,706 3 *
Ringing Phone Light Flasher 234,558 35 *
Simple Phone Tap Derek Tombrello 396,424 98 *
Telephone Hold Button 140,635 10
Telephone Recorder 228,934 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.