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
Saturday, October 17, 2026		 Wire Loop Alarm13
12VDC To 120VAC Inverter12
Yesterday
Friday, October 16, 2026		 3 Channel Spectrum Analyzer19
IR Remote Extender18
Of All Time 12VDC To 120VAC Inverter1,570,336
FM Transmitter1,039,257

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,202 61 *
Car Alarm Arming Horn Beep Canceller bob 147,661 6 *
Wireless Auto Tachometer 357,009 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,801 29 *
Parallel (Printer) Port Interface 303,813 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,787 63 *
3 Channel Spectrum Analyzer 237,529 20
40W Fluorescent Lamp Inverter Bart Milnes 343,278 60 *
Adjustable Strobe Light 324,685 36
Black Light 299,990 29
Colour (Sound) Organ 307,095 36
Electronic Dice NEW! 203,019 10 *
Fantastic Atom Expander 214,900 25
Flash Slave Trigger 235,779 18 *
Infa-Red Remote Control 655,263 216 *
IR Remote Extender NEW! 146,421 3 *
IR Remote Jammer Carl 281,723 110 *
IR Remote Switch NEW! 170,547 9 *
LASER Transmitter/Receiver 433,880 92
LED Chaser 464,069 83 *
LED Metronome NEW! 112,407 3 *
LED Thermometer 218,950 22 *
Light/Dark Detector 318,564 90 *
Simple Colour Organ 149,487 11 *
Strobe Light 288,646 27 *
TRIAC Light Dimmer 570,962 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,675 122 *
Electromagnetic Levitator NEW! 156,764 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,335 214 *
AC Motor Speed Controller 411,255 29 *
Air Flow Detector 265,081 54 *
Digital Keypad Combination Lock 214,506 20
Low Voltage Alarm 242,945 58 *
Pine Racecar Victory Judge 114,170 1 *
Pulse Width Modulation DC Motor Control 672,559 94
Rain Detector 318,981 112 *
Simple Lie Detector 581,381 323
Simple Polarity Tester Dudley LeRoux 178,876 13 *
Simple Servo Controller 235,886 22 *
Simple Touch Switch NEW! 183,945 6 *
Simple Two Speed Contactor DC Motor Controller 219,341 21 *
Stepper Motor Controller 772,677 120 *
Time Delay Relay 571,927 88
Time Delay Relay II jawaharlal@excite.com 261,329 39 *
Touch Switch 304,290 51 *
Video Activated Relay 133,936 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,544 10 *
Water Detector With Sump/Bilge Pump Controller 165,986 18 *
Wire Loop Alarm Alex Meaden 218,286 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 338,822 25 *
12VDC To 120VAC Inverter 1,570,336 691
6V to 12V Converter 546,619 121
Automatic 12V Lead Acid Battery Charger 957,602 248
Automatic Load Sensing Power Switch 181,193 16 *
Car Battery Charger 901,268 159 *
Dual Polarity Power Supply 387,760 84 *
Fixed Voltage Power Supply 325,235 52 *
High Current Power Supply 357,780 66 *
High Voltage High Current Power Supply 278,442 35 *
LASER Power Supply 311,506 28
Portable CD Player Adapter For Car 225,717 12 *
Power Supply 756,771 259 *
Solid State Tesla Coil NEW! 163,348 4
Solid State Tesla Coil/High Voltage Generator 465,400 51
Transformerless Power Supply 478,683 117 *
Voltage Inverter 360,446 51 *
Voltage Inverter II 217,686 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,614 182
3 Watt FM Transmitter Rae XL Tkacik 355,777 83 *
50 Watt Amplifier 525,570 74
8 Note Tune Player 153,080 12 *
8 Watt Audio Amp 392,735 67 *
Aircraft Radio Communications Receiver 296,878 50 *
Crystal Radio 175,921 53 *
Digital Volume Control 354,968 47 *
Electronic Stethoscope 338,764 142 *
FET Audio Mixer 358,807 41
FM Transmitter 1,039,257 420
Guitar Fuzz Effect 264,856 54 *
Microphone Mixer Anatoly I. Shikhatov 265,105 26 *
Mono To Stereo Synthesizer oRbEq 149,024 18 *
One Tube Regenerative Radio NEW! 167,457 4 *
Op Amp Radio 408,156 80 *
Single Chip AM Radio NEW! 113,489 4 *
Single Chip FM Radio NEW! 189,661 1 *
Sound Level Meter 357,410 51 *
Stereo Tube Amplifier Weslee Kinsler 283,960 15 *
Tone Control 325,826 31
Transistor Organ 215,447 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,292 27 *
FM Telephone Bug 246,898 57
Phone Busy Indicator 226,555 24 *
Remote Telephone Ringer 129,742 3 *
Ringing Phone Light Flasher 234,605 35 *
Simple Phone Tap Derek Tombrello 396,465 98 *
Telephone Hold Button 140,663 10
Telephone Recorder 228,970 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.