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, September 06, 2026		 12VDC To 120VAC Inverter29
Power Supply22
Yesterday
Saturday, September 05, 2026		 12VDC To 120VAC Inverter44
Stepper Motor Controller44
Of All Time 12VDC To 120VAC Inverter1,568,799
FM Transmitter1,038,148

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 238,699 61 *
Car Alarm Arming Horn Beep Canceller bob 147,228 6 *
Wireless Auto Tachometer 356,420 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,284 29 *
Parallel (Printer) Port Interface 302,929 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,048 63 *
3 Channel Spectrum Analyzer 236,792 20
40W Fluorescent Lamp Inverter Bart Milnes 342,710 60 *
Adjustable Strobe Light 323,966 36
Black Light 299,178 29
Colour (Sound) Organ 306,311 36
Electronic Dice NEW! 202,381 10 *
Fantastic Atom Expander 214,305 25
Flash Slave Trigger 235,024 18 *
Infa-Red Remote Control 654,356 216 *
IR Remote Extender NEW! 145,724 3 *
IR Remote Jammer Carl 281,107 110 *
IR Remote Switch NEW! 169,886 9 *
LASER Transmitter/Receiver 433,207 92
LED Chaser 463,199 83 *
LED Metronome NEW! 111,832 3 *
LED Thermometer 218,420 22 *
Light/Dark Detector 317,958 90 *
Simple Colour Organ 148,867 11 *
Strobe Light 287,969 27 *
TRIAC Light Dimmer 570,184 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 375,931 122 *
Electromagnetic Levitator NEW! 156,233 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 943,390 214 *
AC Motor Speed Controller 410,593 29 *
Air Flow Detector 264,533 54 *
Digital Keypad Combination Lock 213,958 20
Low Voltage Alarm 242,352 58 *
Pine Racecar Victory Judge 113,588 1 *
Pulse Width Modulation DC Motor Control 671,764 94
Rain Detector 318,380 112 *
Simple Lie Detector 580,756 323
Simple Polarity Tester Dudley LeRoux 178,287 13 *
Simple Servo Controller 235,234 22 *
Simple Touch Switch NEW! 183,318 6 *
Simple Two Speed Contactor DC Motor Controller 218,701 21 *
Stepper Motor Controller 771,770 120 *
Time Delay Relay 571,192 88
Time Delay Relay II jawaharlal@excite.com 260,789 39 *
Touch Switch 303,599 51 *
Video Activated Relay 133,260 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 196,732 10 *
Water Detector With Sump/Bilge Pump Controller 165,470 18 *
Wire Loop Alarm Alex Meaden 217,649 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 338,020 25 *
12VDC To 120VAC Inverter 1,568,799 691
6V to 12V Converter 545,836 121
Automatic 12V Lead Acid Battery Charger 956,777 248
Automatic Load Sensing Power Switch 180,611 16 *
Car Battery Charger 900,603 159 *
Dual Polarity Power Supply 387,081 84 *
Fixed Voltage Power Supply 324,673 52 *
High Current Power Supply 357,100 66 *
High Voltage High Current Power Supply 277,933 35 *
LASER Power Supply 310,831 28
Portable CD Player Adapter For Car 225,100 12 *
Power Supply 756,016 259 *
Solid State Tesla Coil NEW! 162,607 4
Solid State Tesla Coil/High Voltage Generator 464,533 51
Transformerless Power Supply 478,087 117 *
Voltage Inverter 359,597 51 *
Voltage Inverter II 217,075 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,039 182
3 Watt FM Transmitter Rae XL Tkacik 355,029 83 *
50 Watt Amplifier 524,876 74
8 Note Tune Player 152,513 12 *
8 Watt Audio Amp 391,990 67 *
Aircraft Radio Communications Receiver 296,186 50 *
Crystal Radio 175,278 53 *
Digital Volume Control 354,267 47 *
Electronic Stethoscope 338,070 142 *
FET Audio Mixer 358,161 41
FM Transmitter 1,038,148 420
Guitar Fuzz Effect 264,127 54 *
Microphone Mixer Anatoly I. Shikhatov 264,502 26 *
Mono To Stereo Synthesizer oRbEq 148,370 18 *
One Tube Regenerative Radio NEW! 166,526 4 *
Op Amp Radio 407,349 80 *
Single Chip AM Radio NEW! 112,901 4 *
Single Chip FM Radio NEW! 188,799 1 *
Sound Level Meter 356,727 51 *
Stereo Tube Amplifier Weslee Kinsler 283,380 15 *
Tone Control 325,184 31
Transistor Organ 214,492 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 174,788 27 *
FM Telephone Bug 246,329 57
Phone Busy Indicator 225,972 24 *
Remote Telephone Ringer 129,236 3 *
Ringing Phone Light Flasher 234,013 35 *
Simple Phone Tap Derek Tombrello 395,918 98 *
Telephone Hold Button 140,183 10
Telephone Recorder 228,348 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.