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
Thursday, August 28, 2025		 12VDC To 120VAC Inverter33
One Tube Regenerative Radio21
Yesterday
Wednesday, August 27, 2025		 12VDC To 120VAC Inverter40
3 Watt FM Transmitter35
Of All Time 12VDC To 120VAC Inverter1,552,088
FM Transmitter1,024,946

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 233,242 61 *
Car Alarm Arming Horn Beep Canceller bob 142,130 6 *
Wireless Auto Tachometer 350,110 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 165,483 29 *
Parallel (Printer) Port Interface 295,122 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 455,751 63 *
3 Channel Spectrum Analyzer 230,000 20
40W Fluorescent Lamp Inverter Bart Milnes 336,741 60 *
Adjustable Strobe Light 317,297 36
Black Light 291,223 29
Colour (Sound) Organ 298,911 36
Electronic Dice NEW! 196,010 10 *
Fantastic Atom Expander 208,818 25
Flash Slave Trigger 228,447 18 *
Infa-Red Remote Control 646,482 216 *
IR Remote Extender NEW! 139,591 3 *
IR Remote Jammer Carl 274,194 110 *
IR Remote Switch NEW! 163,975 9 *
LASER Transmitter/Receiver 426,080 92
LED Chaser 455,067 83 *
LED Metronome NEW! 105,832 3 *
LED Thermometer 213,094 22 *
Light/Dark Detector 312,346 90 *
Simple Colour Organ 143,379 11 *
Strobe Light 282,216 27 *
TRIAC Light Dimmer 561,970 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 368,047 122 *
Electromagnetic Levitator NEW! 150,715 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 933,294 214 *
AC Motor Speed Controller 402,182 29 *
Air Flow Detector 258,482 54 *
Digital Keypad Combination Lock 208,289 20
Low Voltage Alarm 236,093 58 *
Pine Racecar Victory Judge 108,363 1 *
Pulse Width Modulation DC Motor Control 664,167 94
Rain Detector 311,991 112 *
Simple Lie Detector 573,536 323
Simple Polarity Tester Dudley LeRoux 171,925 13 *
Simple Servo Controller 228,833 22 *
Simple Touch Switch NEW! 176,900 6 *
Simple Two Speed Contactor DC Motor Controller 212,306 21 *
Stepper Motor Controller 761,400 120 *
Time Delay Relay 564,121 88
Time Delay Relay II jawaharlal@excite.com 254,511 39 *
Touch Switch 297,280 51 *
Video Activated Relay 127,893 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 188,711 10 *
Water Detector With Sump/Bilge Pump Controller 159,447 18 *
Wire Loop Alarm Alex Meaden 212,088 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! 327,318 25 *
12VDC To 120VAC Inverter 1,552,088 691
6V to 12V Converter 537,596 121
Automatic 12V Lead Acid Battery Charger 947,570 248
Automatic Load Sensing Power Switch 174,431 16 *
Car Battery Charger 892,832 159 *
Dual Polarity Power Supply 379,649 84 *
Fixed Voltage Power Supply 319,087 52 *
High Current Power Supply 349,417 66 *
High Voltage High Current Power Supply 271,722 35 *
LASER Power Supply 304,524 28
Portable CD Player Adapter For Car 219,070 12 *
Power Supply 748,525 259 *
Solid State Tesla Coil NEW! 154,953 4
Solid State Tesla Coil/High Voltage Generator 455,118 51
Transformerless Power Supply 471,594 117 *
Voltage Inverter 351,036 51 *
Voltage Inverter II 211,010 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 593,777 182
3 Watt FM Transmitter Rae XL Tkacik 346,771 83 *
50 Watt Amplifier 517,839 74
8 Note Tune Player 147,216 12 *
8 Watt Audio Amp 383,594 67 *
Aircraft Radio Communications Receiver 288,677 50 *
Crystal Radio 167,344 53 *
Digital Volume Control 347,548 47 *
Electronic Stethoscope 330,481 142 *
FET Audio Mixer 351,968 41
FM Transmitter 1,024,946 420
Guitar Fuzz Effect 256,409 54 *
Microphone Mixer Anatoly I. Shikhatov 258,377 26 *
Mono To Stereo Synthesizer oRbEq 141,940 18 *
One Tube Regenerative Radio NEW! 157,050 4 *
Op Amp Radio 399,879 80 *
Single Chip AM Radio NEW! 106,881 4 *
Single Chip FM Radio NEW! 181,317 1 *
Sound Level Meter 350,142 51 *
Stereo Tube Amplifier Weslee Kinsler 276,315 15 *
Tone Control 318,220 31
Transistor Organ 208,017 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 169,693 27 *
FM Telephone Bug 241,238 57
Phone Busy Indicator 220,425 24 *
Remote Telephone Ringer 124,151 3 *
Ringing Phone Light Flasher 226,844 35 *
Simple Phone Tap Derek Tombrello 390,441 98 *
Telephone Hold Button 135,391 10
Telephone Recorder 223,113 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.