Electronic Circuits

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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, September 18, 2025		 12VDC To 120VAC Inverter43
Stepper Motor Controller43
Yesterday
Wednesday, September 17, 2025		 12VDC To 120VAC Inverter53
Stepper Motor Controller47
Of All Time 12VDC To 120VAC Inverter1,553,225
FM Transmitter1,025,834

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 233,709 61 *
Car Alarm Arming Horn Beep Canceller bob 142,524 6 *
Wireless Auto Tachometer 350,609 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 165,855 29 *
Parallel (Printer) Port Interface 295,798 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 456,339 63 *
3 Channel Spectrum Analyzer 230,552 20
40W Fluorescent Lamp Inverter Bart Milnes 337,260 60 *
Adjustable Strobe Light 317,881 36
Black Light 291,855 29
Colour (Sound) Organ 299,536 36
Electronic Dice NEW! 196,483 10 *
Fantastic Atom Expander 209,267 25
Flash Slave Trigger 228,975 18 *
Infa-Red Remote Control 647,095 216 *
IR Remote Extender NEW! 140,082 3 *
IR Remote Jammer Carl 274,731 110 *
IR Remote Switch NEW! 164,443 9 *
LASER Transmitter/Receiver 426,664 92
LED Chaser 455,749 83 *
LED Metronome NEW! 106,280 3 *
LED Thermometer 213,542 22 *
Light/Dark Detector 312,841 90 *
Simple Colour Organ 143,813 11 *
Strobe Light 282,749 27 *
TRIAC Light Dimmer 562,572 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 368,640 122 *
Electromagnetic Levitator NEW! 151,179 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 933,998 214 *
AC Motor Speed Controller 402,951 29 *
Air Flow Detector 258,946 54 *
Digital Keypad Combination Lock 208,747 20
Low Voltage Alarm 236,589 58 *
Pine Racecar Victory Judge 108,776 1 *
Pulse Width Modulation DC Motor Control 664,812 94
Rain Detector 312,473 112 *
Simple Lie Detector 574,088 323
Simple Polarity Tester Dudley LeRoux 172,392 13 *
Simple Servo Controller 229,368 22 *
Simple Touch Switch NEW! 177,425 6 *
Simple Two Speed Contactor DC Motor Controller 212,799 21 *
Stepper Motor Controller 762,290 120 *
Time Delay Relay 564,671 88
Time Delay Relay II jawaharlal@excite.com 255,015 39 *
Touch Switch 297,778 51 *
Video Activated Relay 128,331 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 189,238 10 *
Water Detector With Sump/Bilge Pump Controller 159,848 18 *
Wire Loop Alarm Alex Meaden 212,536 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 328,110 25 *
12VDC To 120VAC Inverter 1,553,225 691
6V to 12V Converter 538,201 121
Automatic 12V Lead Acid Battery Charger 948,208 248
Automatic Load Sensing Power Switch 174,933 16 *
Car Battery Charger 893,433 159 *
Dual Polarity Power Supply 380,234 84 *
Fixed Voltage Power Supply 319,583 52 *
High Current Power Supply 350,169 66 *
High Voltage High Current Power Supply 272,196 35 *
LASER Power Supply 305,023 28
Portable CD Player Adapter For Car 219,528 12 *
Power Supply 749,124 259 *
Solid State Tesla Coil NEW! 155,519 4
Solid State Tesla Coil/High Voltage Generator 455,798 51
Transformerless Power Supply 472,076 117 *
Voltage Inverter 351,737 51 *
Voltage Inverter II 211,446 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 594,287 182
3 Watt FM Transmitter Rae XL Tkacik 347,434 83 *
50 Watt Amplifier 518,419 74
8 Note Tune Player 147,608 12 *
8 Watt Audio Amp 384,357 67 *
Aircraft Radio Communications Receiver 289,352 50 *
Crystal Radio 168,039 53 *
Digital Volume Control 348,056 47 *
Electronic Stethoscope 331,099 142 *
FET Audio Mixer 352,517 41
FM Transmitter 1,025,834 420
Guitar Fuzz Effect 257,000 54 *
Microphone Mixer Anatoly I. Shikhatov 258,867 26 *
Mono To Stereo Synthesizer oRbEq 142,440 18 *
One Tube Regenerative Radio NEW! 157,839 4 *
Op Amp Radio 400,482 80 *
Single Chip AM Radio NEW! 107,331 4 *
Single Chip FM Radio NEW! 181,872 1 *
Sound Level Meter 350,677 51 *
Stereo Tube Amplifier Weslee Kinsler 276,901 15 *
Tone Control 318,780 31
Transistor Organ 208,479 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,098 27 *
FM Telephone Bug 241,696 57
Phone Busy Indicator 220,873 24 *
Remote Telephone Ringer 124,531 3 *
Ringing Phone Light Flasher 227,423 35 *
Simple Phone Tap Derek Tombrello 390,937 98 *
Telephone Hold Button 135,809 10
Telephone Recorder 223,588 55 *

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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.