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, September 11, 2026		 Voltage Inverter18
One Tube Regenerative Radio11
Yesterday
Thursday, September 10, 2026		 12VDC To 120VAC Inverter32
Dual Polarity Power Supply29
Of All Time 12VDC To 120VAC Inverter1,568,987
FM Transmitter1,038,246

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,740 61 *
Car Alarm Arming Horn Beep Canceller bob 147,264 6 *
Wireless Auto Tachometer 356,470 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 170,325 29 *
Parallel (Printer) Port Interface 303,073 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,120 63 *
3 Channel Spectrum Analyzer 236,870 20
40W Fluorescent Lamp Inverter Bart Milnes 342,772 60 *
Adjustable Strobe Light 324,018 36
Black Light 299,250 29
Colour (Sound) Organ 306,380 36
Electronic Dice NEW! 202,438 10 *
Fantastic Atom Expander 214,352 25
Flash Slave Trigger 235,090 18 *
Infa-Red Remote Control 654,490 216 *
IR Remote Extender NEW! 145,781 3 *
IR Remote Jammer Carl 281,163 110 *
IR Remote Switch NEW! 169,947 9 *
LASER Transmitter/Receiver 433,281 92
LED Chaser 463,410 83 *
LED Metronome NEW! 111,885 3 *
LED Thermometer 218,464 22 *
Light/Dark Detector 318,010 90 *
Simple Colour Organ 148,916 11 *
Strobe Light 288,024 27 *
TRIAC Light Dimmer 570,257 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 375,993 122 *
Electromagnetic Levitator NEW! 156,289 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 943,604 214 *
AC Motor Speed Controller 410,656 29 *
Air Flow Detector 264,587 54 *
Digital Keypad Combination Lock 214,017 20
Low Voltage Alarm 242,398 58 *
Pine Racecar Victory Judge 113,629 1 *
Pulse Width Modulation DC Motor Control 671,835 94
Rain Detector 318,427 112 *
Simple Lie Detector 580,820 323
Simple Polarity Tester Dudley LeRoux 178,344 13 *
Simple Servo Controller 235,287 22 *
Simple Touch Switch NEW! 183,368 6 *
Simple Two Speed Contactor DC Motor Controller 218,763 21 *
Stepper Motor Controller 771,865 120 *
Time Delay Relay 571,274 88
Time Delay Relay II jawaharlal@excite.com 260,847 39 *
Touch Switch 303,661 51 *
Video Activated Relay 133,318 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 196,811 10 *
Water Detector With Sump/Bilge Pump Controller 165,524 18 *
Wire Loop Alarm Alex Meaden 217,697 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! 338,094 25 *
12VDC To 120VAC Inverter 1,568,987 691
6V to 12V Converter 545,927 121
Automatic 12V Lead Acid Battery Charger 956,866 248
Automatic Load Sensing Power Switch 180,653 16 *
Car Battery Charger 900,649 159 *
Dual Polarity Power Supply 387,160 84 *
Fixed Voltage Power Supply 324,727 52 *
High Current Power Supply 357,163 66 *
High Voltage High Current Power Supply 277,979 35 *
LASER Power Supply 310,899 28
Portable CD Player Adapter For Car 225,160 12 *
Power Supply 756,095 259 *
Solid State Tesla Coil NEW! 162,686 4
Solid State Tesla Coil/High Voltage Generator 464,629 51
Transformerless Power Supply 478,140 117 *
Voltage Inverter 359,691 51 *
Voltage Inverter II 217,125 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,096 182
3 Watt FM Transmitter Rae XL Tkacik 355,100 83 *
50 Watt Amplifier 524,939 74
8 Note Tune Player 152,568 12 *
8 Watt Audio Amp 392,074 67 *
Aircraft Radio Communications Receiver 296,244 50 *
Crystal Radio 175,361 53 *
Digital Volume Control 354,351 47 *
Electronic Stethoscope 338,140 142 *
FET Audio Mixer 358,220 41
FM Transmitter 1,038,246 420
Guitar Fuzz Effect 264,182 54 *
Microphone Mixer Anatoly I. Shikhatov 264,544 26 *
Mono To Stereo Synthesizer oRbEq 148,419 18 *
One Tube Regenerative Radio NEW! 166,632 4 *
Op Amp Radio 407,428 80 *
Single Chip AM Radio NEW! 112,962 4 *
Single Chip FM Radio NEW! 188,873 1 *
Sound Level Meter 356,785 51 *
Stereo Tube Amplifier Weslee Kinsler 283,429 15 *
Tone Control 325,233 31
Transistor Organ 214,575 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,831 27 *
FM Telephone Bug 246,375 57
Phone Busy Indicator 226,013 24 *
Remote Telephone Ringer 129,274 3 *
Ringing Phone Light Flasher 234,066 35 *
Simple Phone Tap Derek Tombrello 395,956 98 *
Telephone Hold Button 140,225 10
Telephone Recorder 228,395 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.