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, October 05, 2026		 12VDC To 120VAC Inverter28
Simple Servo Controller17
Yesterday
Sunday, October 04, 2026		 12VDC To 120VAC Inverter47
Stepper Motor Controller38
Of All Time 12VDC To 120VAC Inverter1,569,852
FM Transmitter1,038,964

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 239,050 61 *
Car Alarm Arming Horn Beep Canceller bob 147,512 6 *
Wireless Auto Tachometer 356,801 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 170,625 29 *
Parallel (Printer) Port Interface 303,544 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 463,559 63 *
3 Channel Spectrum Analyzer 237,258 20
40W Fluorescent Lamp Inverter Bart Milnes 343,077 60 *
Adjustable Strobe Light 324,487 36
Black Light 299,719 29
Colour (Sound) Organ 306,848 36
Electronic Dice NEW! 202,793 10 *
Fantastic Atom Expander 214,700 25
Flash Slave Trigger 235,517 18 *
Infa-Red Remote Control 655,024 216 *
IR Remote Extender NEW! 146,182 3 *
IR Remote Jammer Carl 281,512 110 *
IR Remote Switch NEW! 170,322 9 *
LASER Transmitter/Receiver 433,647 92
LED Chaser 463,830 83 *
LED Metronome NEW! 112,210 3 *
LED Thermometer 218,767 22 *
Light/Dark Detector 318,383 90 *
Simple Colour Organ 149,282 11 *
Strobe Light 288,423 27 *
TRIAC Light Dimmer 570,702 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 376,449 122 *
Electromagnetic Levitator NEW! 156,592 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 944,047 214 *
AC Motor Speed Controller 411,024 29 *
Air Flow Detector 264,908 54 *
Digital Keypad Combination Lock 214,308 20
Low Voltage Alarm 242,752 58 *
Pine Racecar Victory Judge 113,986 1 *
Pulse Width Modulation DC Motor Control 672,297 94
Rain Detector 318,783 112 *
Simple Lie Detector 581,174 323
Simple Polarity Tester Dudley LeRoux 178,684 13 *
Simple Servo Controller 235,674 22 *
Simple Touch Switch NEW! 183,739 6 *
Simple Two Speed Contactor DC Motor Controller 219,120 21 *
Stepper Motor Controller 772,392 120 *
Time Delay Relay 571,716 88
Time Delay Relay II jawaharlal@excite.com 261,160 39 *
Touch Switch 304,066 51 *
Video Activated Relay 133,707 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 197,319 10 *
Water Detector With Sump/Bilge Pump Controller 165,802 18 *
Wire Loop Alarm Alex Meaden 218,076 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 338,545 25 *
12VDC To 120VAC Inverter 1,569,852 691
6V to 12V Converter 546,367 121
Automatic 12V Lead Acid Battery Charger 957,342 248
Automatic Load Sensing Power Switch 181,022 16 *
Car Battery Charger 901,072 159 *
Dual Polarity Power Supply 387,590 84 *
Fixed Voltage Power Supply 325,058 52 *
High Current Power Supply 357,561 66 *
High Voltage High Current Power Supply 278,263 35 *
LASER Power Supply 311,273 28
Portable CD Player Adapter For Car 225,509 12 *
Power Supply 756,512 259 *
Solid State Tesla Coil NEW! 163,120 4
Solid State Tesla Coil/High Voltage Generator 465,104 51
Transformerless Power Supply 478,482 117 *
Voltage Inverter 360,190 51 *
Voltage Inverter II 217,493 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 600,428 182
3 Watt FM Transmitter Rae XL Tkacik 355,548 83 *
50 Watt Amplifier 525,345 74
8 Note Tune Player 152,896 12 *
8 Watt Audio Amp 392,469 67 *
Aircraft Radio Communications Receiver 296,645 50 *
Crystal Radio 175,723 53 *
Digital Volume Control 354,759 47 *
Electronic Stethoscope 338,497 142 *
FET Audio Mixer 358,580 41
FM Transmitter 1,038,964 420
Guitar Fuzz Effect 264,599 54 *
Microphone Mixer Anatoly I. Shikhatov 264,932 26 *
Mono To Stereo Synthesizer oRbEq 148,791 18 *
One Tube Regenerative Radio NEW! 167,161 4 *
Op Amp Radio 407,907 80 *
Single Chip AM Radio NEW! 113,298 4 *
Single Chip FM Radio NEW! 189,381 1 *
Sound Level Meter 357,207 51 *
Stereo Tube Amplifier Weslee Kinsler 283,757 15 *
Tone Control 325,637 31
Transistor Organ 215,231 29

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 175,132 27 *
FM Telephone Bug 246,717 57
Phone Busy Indicator 226,349 24 *
Remote Telephone Ringer 129,565 3 *
Ringing Phone Light Flasher 234,413 35 *
Simple Phone Tap Derek Tombrello 396,260 98 *
Telephone Hold Button 140,491 10
Telephone Recorder 228,755 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.