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
Monday, September 15, 2025		 12VDC To 120VAC Inverter76
12VDC To 120VAC Inverter76
Yesterday
Sunday, September 14, 2025		 12VDC To 120VAC Inverter61
LED Chaser42
Of All Time 12VDC To 120VAC Inverter1,553,083
FM Transmitter1,025,707

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 233,647 61 *
Car Alarm Arming Horn Beep Canceller bob 142,459 6 *
Wireless Auto Tachometer 350,529 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 165,792 29 *
Parallel (Printer) Port Interface 295,685 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 456,261 63 *
3 Channel Spectrum Analyzer 230,475 20
40W Fluorescent Lamp Inverter Bart Milnes 337,197 60 *
Adjustable Strobe Light 317,808 36
Black Light 291,750 29
Colour (Sound) Organ 299,459 36
Electronic Dice NEW! 196,423 10 *
Fantastic Atom Expander 209,204 25
Flash Slave Trigger 228,895 18 *
Infa-Red Remote Control 647,009 216 *
IR Remote Extender NEW! 140,008 3 *
IR Remote Jammer Carl 274,649 110 *
IR Remote Switch NEW! 164,367 9 *
LASER Transmitter/Receiver 426,588 92
LED Chaser 455,649 83 *
LED Metronome NEW! 106,218 3 *
LED Thermometer 213,477 22 *
Light/Dark Detector 312,754 90 *
Simple Colour Organ 143,747 11 *
Strobe Light 282,682 27 *
TRIAC Light Dimmer 562,471 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 368,540 122 *
Electromagnetic Levitator NEW! 151,114 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 933,880 214 *
AC Motor Speed Controller 402,836 29 *
Air Flow Detector 258,880 54 *
Digital Keypad Combination Lock 208,667 20
Low Voltage Alarm 236,512 58 *
Pine Racecar Victory Judge 108,707 1 *
Pulse Width Modulation DC Motor Control 664,722 94
Rain Detector 312,396 112 *
Simple Lie Detector 574,006 323
Simple Polarity Tester Dudley LeRoux 172,325 13 *
Simple Servo Controller 229,280 22 *
Simple Touch Switch NEW! 177,354 6 *
Simple Two Speed Contactor DC Motor Controller 212,727 21 *
Stepper Motor Controller 762,156 120 *
Time Delay Relay 564,587 88
Time Delay Relay II jawaharlal@excite.com 254,931 39 *
Touch Switch 297,698 51 *
Video Activated Relay 128,265 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 189,164 10 *
Water Detector With Sump/Bilge Pump Controller 159,790 18 *
Wire Loop Alarm Alex Meaden 212,457 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 327,988 25 *
12VDC To 120VAC Inverter 1,553,083 691
6V to 12V Converter 538,132 121
Automatic 12V Lead Acid Battery Charger 948,101 248
Automatic Load Sensing Power Switch 174,856 16 *
Car Battery Charger 893,349 159 *
Dual Polarity Power Supply 380,140 84 *
Fixed Voltage Power Supply 319,520 52 *
High Current Power Supply 350,067 66 *
High Voltage High Current Power Supply 272,129 35 *
LASER Power Supply 304,950 28
Portable CD Player Adapter For Car 219,457 12 *
Power Supply 749,049 259 *
Solid State Tesla Coil NEW! 155,408 4
Solid State Tesla Coil/High Voltage Generator 455,703 51
Transformerless Power Supply 471,997 117 *
Voltage Inverter 351,639 51 *
Voltage Inverter II 211,378 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 594,216 182
3 Watt FM Transmitter Rae XL Tkacik 347,355 83 *
50 Watt Amplifier 518,339 74
8 Note Tune Player 147,543 12 *
8 Watt Audio Amp 384,249 67 *
Aircraft Radio Communications Receiver 289,252 50 *
Crystal Radio 167,939 53 *
Digital Volume Control 347,968 47 *
Electronic Stethoscope 330,995 142 *
FET Audio Mixer 352,445 41
FM Transmitter 1,025,707 420
Guitar Fuzz Effect 256,915 54 *
Microphone Mixer Anatoly I. Shikhatov 258,790 26 *
Mono To Stereo Synthesizer oRbEq 142,360 18 *
One Tube Regenerative Radio NEW! 157,730 4 *
Op Amp Radio 400,393 80 *
Single Chip AM Radio NEW! 107,255 4 *
Single Chip FM Radio NEW! 181,787 1 *
Sound Level Meter 350,602 51 *
Stereo Tube Amplifier Weslee Kinsler 276,803 15 *
Tone Control 318,684 31
Transistor Organ 208,401 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,038 27 *
FM Telephone Bug 241,637 57
Phone Busy Indicator 220,801 24 *
Remote Telephone Ringer 124,473 3 *
Ringing Phone Light Flasher 227,340 35 *
Simple Phone Tap Derek Tombrello 390,880 98 *
Telephone Hold Button 135,757 10
Telephone Recorder 223,526 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.