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 Inverter39
12VDC To 120VAC Inverter39
Yesterday
Sunday, September 14, 2025		 12VDC To 120VAC Inverter61
LED Chaser42
Of All Time 12VDC To 120VAC Inverter1,553,043
FM Transmitter1,025,680

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 233,617 61 *
Car Alarm Arming Horn Beep Canceller bob 142,440 6 *
Wireless Auto Tachometer 350,508 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 165,778 29 *
Parallel (Printer) Port Interface 295,657 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 456,240 63 *
3 Channel Spectrum Analyzer 230,455 20
40W Fluorescent Lamp Inverter Bart Milnes 337,179 60 *
Adjustable Strobe Light 317,787 36
Black Light 291,726 29
Colour (Sound) Organ 299,438 36
Electronic Dice NEW! 196,404 10 *
Fantastic Atom Expander 209,186 25
Flash Slave Trigger 228,878 18 *
Infa-Red Remote Control 646,988 216 *
IR Remote Extender NEW! 139,991 3 *
IR Remote Jammer Carl 274,630 110 *
IR Remote Switch NEW! 164,350 9 *
LASER Transmitter/Receiver 426,566 92
LED Chaser 455,619 83 *
LED Metronome NEW! 106,199 3 *
LED Thermometer 213,460 22 *
Light/Dark Detector 312,737 90 *
Simple Colour Organ 143,732 11 *
Strobe Light 282,664 27 *
TRIAC Light Dimmer 562,448 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 368,520 122 *
Electromagnetic Levitator NEW! 151,098 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 933,853 214 *
AC Motor Speed Controller 402,811 29 *
Air Flow Detector 258,860 54 *
Digital Keypad Combination Lock 208,649 20
Low Voltage Alarm 236,495 58 *
Pine Racecar Victory Judge 108,691 1 *
Pulse Width Modulation DC Motor Control 664,702 94
Rain Detector 312,384 112 *
Simple Lie Detector 573,985 323
Simple Polarity Tester Dudley LeRoux 172,303 13 *
Simple Servo Controller 229,260 22 *
Simple Touch Switch NEW! 177,332 6 *
Simple Two Speed Contactor DC Motor Controller 212,708 21 *
Stepper Motor Controller 762,134 120 *
Time Delay Relay 564,571 88
Time Delay Relay II jawaharlal@excite.com 254,910 39 *
Touch Switch 297,679 51 *
Video Activated Relay 128,249 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 189,150 10 *
Water Detector With Sump/Bilge Pump Controller 159,768 18 *
Wire Loop Alarm Alex Meaden 212,440 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 327,959 25 *
12VDC To 120VAC Inverter 1,553,043 691
6V to 12V Converter 538,115 121
Automatic 12V Lead Acid Battery Charger 948,078 248
Automatic Load Sensing Power Switch 174,836 16 *
Car Battery Charger 893,331 159 *
Dual Polarity Power Supply 380,118 84 *
Fixed Voltage Power Supply 319,503 52 *
High Current Power Supply 350,043 66 *
High Voltage High Current Power Supply 272,105 35 *
LASER Power Supply 304,935 28
Portable CD Player Adapter For Car 219,440 12 *
Power Supply 749,030 259 *
Solid State Tesla Coil NEW! 155,384 4
Solid State Tesla Coil/High Voltage Generator 455,677 51
Transformerless Power Supply 471,978 117 *
Voltage Inverter 351,621 51 *
Voltage Inverter II 211,363 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 594,195 182
3 Watt FM Transmitter Rae XL Tkacik 347,333 83 *
50 Watt Amplifier 518,314 74
8 Note Tune Player 147,528 12 *
8 Watt Audio Amp 384,209 67 *
Aircraft Radio Communications Receiver 289,229 50 *
Crystal Radio 167,923 53 *
Digital Volume Control 347,954 47 *
Electronic Stethoscope 330,972 142 *
FET Audio Mixer 352,428 41
FM Transmitter 1,025,680 420
Guitar Fuzz Effect 256,895 54 *
Microphone Mixer Anatoly I. Shikhatov 258,776 26 *
Mono To Stereo Synthesizer oRbEq 142,344 18 *
One Tube Regenerative Radio NEW! 157,704 4 *
Op Amp Radio 400,379 80 *
Single Chip AM Radio NEW! 107,241 4 *
Single Chip FM Radio NEW! 181,765 1 *
Sound Level Meter 350,583 51 *
Stereo Tube Amplifier Weslee Kinsler 276,783 15 *
Tone Control 318,658 31
Transistor Organ 208,383 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 170,025 27 *
FM Telephone Bug 241,621 57
Phone Busy Indicator 220,782 24 *
Remote Telephone Ringer 124,457 3 *
Ringing Phone Light Flasher 227,322 35 *
Simple Phone Tap Derek Tombrello 390,865 98 *
Telephone Hold Button 135,742 10
Telephone Recorder 223,510 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.