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
Monday, September 21, 2026		 Mono To Stereo Synthesizer12
Transistor Organ11
Yesterday
Sunday, September 20, 2026		 Transistor Organ33
12VDC Fluorescent Lamp Driver29
Of All Time 12VDC To 120VAC Inverter1,569,335
FM Transmitter1,038,535

Auto

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,851 61 *
Car Alarm Arming Horn Beep Canceller bob 147,354 6 *
Wireless Auto Tachometer 356,591 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 170,463 29 *
Parallel (Printer) Port Interface 303,250 71

Light/Laser

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,257 63 *
3 Channel Spectrum Analyzer 237,006 20
40W Fluorescent Lamp Inverter Bart Milnes 342,888 60 *
Adjustable Strobe Light 324,158 36
Black Light 299,411 29
Colour (Sound) Organ 306,564 36
Electronic Dice NEW! 202,573 10 *
Fantastic Atom Expander 214,485 25
Flash Slave Trigger 235,225 18 *
Infa-Red Remote Control 654,661 216 *
IR Remote Extender NEW! 145,913 3 *
IR Remote Jammer Carl 281,276 110 *
IR Remote Switch NEW! 170,073 9 *
LASER Transmitter/Receiver 433,414 92
LED Chaser 463,568 83 *
LED Metronome NEW! 112,000 3 *
LED Thermometer 218,579 22 *
Light/Dark Detector 318,138 90 *
Simple Colour Organ 149,035 11 *
Strobe Light 288,151 27 *
TRIAC Light Dimmer 570,445 55

Major Projects

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,154 122 *
Electromagnetic Levitator NEW! 156,395 15 *

Other

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
7 Segment LED Counter 943,766 214 *
AC Motor Speed Controller 410,793 29 *
Air Flow Detector 264,700 54 *
Digital Keypad Combination Lock 214,119 20
Low Voltage Alarm 242,541 58 *
Pine Racecar Victory Judge 113,736 1 *
Pulse Width Modulation DC Motor Control 671,974 94
Rain Detector 318,549 112 *
Simple Lie Detector 580,935 323
Simple Polarity Tester Dudley LeRoux 178,456 13 *
Simple Servo Controller 235,410 22 *
Simple Touch Switch NEW! 183,495 6 *
Simple Two Speed Contactor DC Motor Controller 218,894 21 *
Stepper Motor Controller 772,061 120 *
Time Delay Relay 571,419 88
Time Delay Relay II jawaharlal@excite.com 260,945 39 *
Touch Switch 303,804 51 *
Video Activated Relay 133,418 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,008 10 *
Water Detector With Sump/Bilge Pump Controller 165,626 18 *
Wire Loop Alarm Alex Meaden 217,840 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! 338,292 25 *
12VDC To 120VAC Inverter 1,569,335 691
6V to 12V Converter 546,092 121
Automatic 12V Lead Acid Battery Charger 957,037 248
Automatic Load Sensing Power Switch 180,766 16 *
Car Battery Charger 900,822 159 *
Dual Polarity Power Supply 387,297 84 *
Fixed Voltage Power Supply 324,858 52 *
High Current Power Supply 357,277 66 *
High Voltage High Current Power Supply 278,092 35 *
LASER Power Supply 311,000 28
Portable CD Player Adapter For Car 225,272 12 *
Power Supply 756,231 259 *
Solid State Tesla Coil NEW! 162,814 4
Solid State Tesla Coil/High Voltage Generator 464,781 51
Transformerless Power Supply 478,244 117 *
Voltage Inverter 359,876 51 *
Voltage Inverter II 217,258 19 *

Sound/Radio

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,200 182
3 Watt FM Transmitter Rae XL Tkacik 355,249 83 *
50 Watt Amplifier 525,091 74
8 Note Tune Player 152,673 12 *
8 Watt Audio Amp 392,213 67 *
Aircraft Radio Communications Receiver 296,390 50 *
Crystal Radio 175,492 53 *
Digital Volume Control 354,494 47 *
Electronic Stethoscope 338,270 142 *
FET Audio Mixer 358,344 41
FM Transmitter 1,038,535 420
Guitar Fuzz Effect 264,331 54 *
Microphone Mixer Anatoly I. Shikhatov 264,664 26 *
Mono To Stereo Synthesizer oRbEq 148,567 18 *
One Tube Regenerative Radio NEW! 166,800 4 *
Op Amp Radio 407,597 80 *
Single Chip AM Radio NEW! 113,053 4 *
Single Chip FM Radio NEW! 189,018 1 *
Sound Level Meter 356,937 51 *
Stereo Tube Amplifier Weslee Kinsler 283,548 15 *
Tone Control 325,370 31
Transistor Organ 214,837 29

Telephone

 Back to the top of this document
Detailed View: On/Off
Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,943 27 *
FM Telephone Bug 246,493 57
Phone Busy Indicator 226,160 24 *
Remote Telephone Ringer 129,384 3 *
Ringing Phone Light Flasher 234,209 35 *
Simple Phone Tap Derek Tombrello 396,073 98 *
Telephone Hold Button 140,334 10
Telephone Recorder 228,503 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.