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, September 03, 2025		 12VDC To 120VAC Inverter12
Simple Touch Switch9
Yesterday
Tuesday, September 02, 2025		 Digital Keypad Combination Lock35
7 Segment LED Counter33
Of All Time 12VDC To 120VAC Inverter1,552,323
FM Transmitter1,025,132

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 233,332 61 *
Car Alarm Arming Horn Beep Canceller bob 142,207 6 *
Wireless Auto Tachometer 350,194 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 165,549 29 *
Parallel (Printer) Port Interface 295,230 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 455,859 63 *
3 Channel Spectrum Analyzer 230,106 20
40W Fluorescent Lamp Inverter Bart Milnes 336,829 60 *
Adjustable Strobe Light 317,420 36
Black Light 291,343 29
Colour (Sound) Organ 299,043 36
Electronic Dice NEW! 196,102 10 *
Fantastic Atom Expander 208,897 25
Flash Slave Trigger 228,543 18 *
Infa-Red Remote Control 646,601 216 *
IR Remote Extender NEW! 139,658 3 *
IR Remote Jammer Carl 274,289 110 *
IR Remote Switch NEW! 164,070 9 *
LASER Transmitter/Receiver 426,186 92
LED Chaser 455,165 83 *
LED Metronome NEW! 105,921 3 *
LED Thermometer 213,168 22 *
Light/Dark Detector 312,437 90 *
Simple Colour Organ 143,457 11 *
Strobe Light 282,318 27 *
TRIAC Light Dimmer 562,084 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 368,144 122 *
Electromagnetic Levitator NEW! 150,807 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 933,460 214 *
AC Motor Speed Controller 402,333 29 *
Air Flow Detector 258,561 54 *
Digital Keypad Combination Lock 208,390 20
Low Voltage Alarm 236,176 58 *
Pine Racecar Victory Judge 108,448 1 *
Pulse Width Modulation DC Motor Control 664,314 94
Rain Detector 312,075 112 *
Simple Lie Detector 573,629 323
Simple Polarity Tester Dudley LeRoux 172,016 13 *
Simple Servo Controller 228,923 22 *
Simple Touch Switch NEW! 177,002 6 *
Simple Two Speed Contactor DC Motor Controller 212,408 21 *
Stepper Motor Controller 761,567 120 *
Time Delay Relay 564,225 88
Time Delay Relay II jawaharlal@excite.com 254,616 39 *
Touch Switch 297,367 51 *
Video Activated Relay 127,980 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 188,798 10 *
Water Detector With Sump/Bilge Pump Controller 159,524 18 *
Wire Loop Alarm Alex Meaden 212,174 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! 327,485 25 *
12VDC To 120VAC Inverter 1,552,323 691
6V to 12V Converter 537,710 121
Automatic 12V Lead Acid Battery Charger 947,710 248
Automatic Load Sensing Power Switch 174,514 16 *
Car Battery Charger 892,962 159 *
Dual Polarity Power Supply 379,752 84 *
Fixed Voltage Power Supply 319,190 52 *
High Current Power Supply 349,539 66 *
High Voltage High Current Power Supply 271,816 35 *
LASER Power Supply 304,628 28
Portable CD Player Adapter For Car 219,149 12 *
Power Supply 748,631 259 *
Solid State Tesla Coil NEW! 155,056 4
Solid State Tesla Coil/High Voltage Generator 455,246 51
Transformerless Power Supply 471,692 117 *
Voltage Inverter 351,187 51 *
Voltage Inverter II 211,089 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 593,868 182
3 Watt FM Transmitter Rae XL Tkacik 346,912 83 *
50 Watt Amplifier 517,939 74
8 Note Tune Player 147,282 12 *
8 Watt Audio Amp 383,732 67 *
Aircraft Radio Communications Receiver 288,793 50 *
Crystal Radio 167,465 53 *
Digital Volume Control 347,649 47 *
Electronic Stethoscope 330,588 142 *
FET Audio Mixer 352,074 41
FM Transmitter 1,025,132 420
Guitar Fuzz Effect 256,533 54 *
Microphone Mixer Anatoly I. Shikhatov 258,478 26 *
Mono To Stereo Synthesizer oRbEq 142,045 18 *
One Tube Regenerative Radio NEW! 157,260 4 *
Op Amp Radio 400,008 80 *
Single Chip AM Radio NEW! 106,967 4 *
Single Chip FM Radio NEW! 181,408 1 *
Sound Level Meter 350,234 51 *
Stereo Tube Amplifier Weslee Kinsler 276,429 15 *
Tone Control 318,330 31
Transistor Organ 208,110 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,778 27 *
FM Telephone Bug 241,332 57
Phone Busy Indicator 220,497 24 *
Remote Telephone Ringer 124,216 3 *
Ringing Phone Light Flasher 226,958 35 *
Simple Phone Tap Derek Tombrello 390,529 98 *
Telephone Hold Button 135,476 10
Telephone Recorder 223,209 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.