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
Sunday, August 30, 2026		 Voltage Inverter6
12V To 24V DC-DC Converter5
Yesterday
Saturday, August 29, 2026		 Adjustable Strobe Light77
Black Light68
Of All Time 12VDC To 120VAC Inverter1,568,478
FM Transmitter1,037,862

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,606 61 *
Car Alarm Arming Horn Beep Canceller bob 147,135 6 *
Wireless Auto Tachometer 356,298 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,187 29 *
Parallel (Printer) Port Interface 302,759 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 462,897 63 *
3 Channel Spectrum Analyzer 236,638 20
40W Fluorescent Lamp Inverter Bart Milnes 342,616 60 *
Adjustable Strobe Light 323,837 36
Black Light 299,046 29
Colour (Sound) Organ 306,156 36
Electronic Dice NEW! 202,257 10 *
Fantastic Atom Expander 214,215 25
Flash Slave Trigger 234,887 18 *
Infa-Red Remote Control 654,133 216 *
IR Remote Extender NEW! 145,603 3 *
IR Remote Jammer Carl 280,980 110 *
IR Remote Switch NEW! 169,759 9 *
LASER Transmitter/Receiver 433,084 92
LED Chaser 463,090 83 *
LED Metronome NEW! 111,706 3 *
LED Thermometer 218,308 22 *
Light/Dark Detector 317,868 90 *
Simple Colour Organ 148,683 11 *
Strobe Light 287,854 27 *
TRIAC Light Dimmer 570,025 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 375,833 122 *
Electromagnetic Levitator NEW! 156,166 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 943,248 214 *
AC Motor Speed Controller 410,451 29 *
Air Flow Detector 264,413 54 *
Digital Keypad Combination Lock 213,858 20
Low Voltage Alarm 242,233 58 *
Pine Racecar Victory Judge 113,424 1 *
Pulse Width Modulation DC Motor Control 671,488 94
Rain Detector 318,262 112 *
Simple Lie Detector 580,632 323
Simple Polarity Tester Dudley LeRoux 178,163 13 *
Simple Servo Controller 235,018 22 *
Simple Touch Switch NEW! 183,195 6 *
Simple Two Speed Contactor DC Motor Controller 218,621 21 *
Stepper Motor Controller 771,577 120 *
Time Delay Relay 571,009 88
Time Delay Relay II jawaharlal@excite.com 260,683 39 *
Touch Switch 303,481 51 *
Video Activated Relay 133,146 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 196,602 10 *
Water Detector With Sump/Bilge Pump Controller 165,359 18 *
Wire Loop Alarm Alex Meaden 217,540 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 337,745 25 *
12VDC To 120VAC Inverter 1,568,478 691
6V to 12V Converter 545,697 121
Automatic 12V Lead Acid Battery Charger 956,622 248
Automatic Load Sensing Power Switch 180,442 16 *
Car Battery Charger 900,465 159 *
Dual Polarity Power Supply 386,896 84 *
Fixed Voltage Power Supply 324,556 52 *
High Current Power Supply 356,961 66 *
High Voltage High Current Power Supply 277,818 35 *
LASER Power Supply 310,691 28
Portable CD Player Adapter For Car 224,974 12 *
Power Supply 755,845 259 *
Solid State Tesla Coil NEW! 162,414 4
Solid State Tesla Coil/High Voltage Generator 464,278 51
Transformerless Power Supply 477,965 117 *
Voltage Inverter 359,421 51 *
Voltage Inverter II 216,947 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 599,914 182
3 Watt FM Transmitter Rae XL Tkacik 354,820 83 *
50 Watt Amplifier 524,736 74
8 Note Tune Player 152,351 12 *
8 Watt Audio Amp 391,814 67 *
Aircraft Radio Communications Receiver 296,012 50 *
Crystal Radio 175,143 53 *
Digital Volume Control 354,124 47 *
Electronic Stethoscope 337,918 142 *
FET Audio Mixer 358,021 41
FM Transmitter 1,037,862 420
Guitar Fuzz Effect 263,979 54 *
Microphone Mixer Anatoly I. Shikhatov 264,326 26 *
Mono To Stereo Synthesizer oRbEq 148,242 18 *
One Tube Regenerative Radio NEW! 166,365 4 *
Op Amp Radio 407,187 80 *
Single Chip AM Radio NEW! 112,760 4 *
Single Chip FM Radio NEW! 188,638 1 *
Sound Level Meter 356,603 51 *
Stereo Tube Amplifier Weslee Kinsler 283,256 15 *
Tone Control 324,998 31
Transistor Organ 214,357 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,677 27 *
FM Telephone Bug 246,204 57
Phone Busy Indicator 225,821 24 *
Remote Telephone Ringer 129,137 3 *
Ringing Phone Light Flasher 233,888 35 *
Simple Phone Tap Derek Tombrello 395,795 98 *
Telephone Hold Button 140,081 10
Telephone Recorder 228,132 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.