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
Tuesday, January 31, 2023
Time Delay Relay II26
12V To 24V DC-DC Converter21
Yesterday
Monday, January 30, 2023
FM Transmitter32
LASER Transmitter/Receiver31
Of All Time 12VDC To 120VAC Inverter1,510,682
FM Transmitter998,542

Auto

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Circuit Author Views Rank Comments Marker
Automatic Headlight Brightness Switch 223,919 61 *
Car Alarm Arming Horn Beep Canceller bob 133,791 6 *
Wireless Auto Tachometer 339,287 58

Computer

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Circuit Author Views Rank Comments Marker
Computer Controlled Frequency Counter/Logic Probe Richard van Wyk 157,374 29 *
Parallel (Printer) Port Interface 281,256 71

Light/Laser

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Circuit Author Views Rank Comments Marker
12VDC Fluorescent Lamp Driver 443,291 63 *
3 Channel Spectrum Analyzer 217,651 20
40W Fluorescent Lamp Inverter Bart Milnes 326,784 60 *
Adjustable Strobe Light 304,886 36
Black Light 274,485 29
Colour (Sound) Organ 286,514 36
Electronic Dice NEW! 185,554 10 *
Fantastic Atom Expander 200,112 25
Flash Slave Trigger 217,182 18 *
Infa-Red Remote Control 629,892 216 *
IR Remote Extender NEW! 128,804 2 *
IR Remote Jammer Carl 261,381 110 *
IR Remote Switch NEW! 154,642 9 *
LASER Transmitter/Receiver 410,214 92
LED Chaser 441,010 83 *
LED Metronome NEW! 96,796 3 *
LED Thermometer 203,898 22 *
Light/Dark Detector 303,155 90 *
Simple Colour Organ 134,957 11 *
Strobe Light 272,247 27 *
TRIAC Light Dimmer 547,026 55

Major Projects

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Circuit Author Views Rank Comments Marker
Computerize Your Room/Home 355,612 122 *
Electromagnetic Levitator NEW! 141,174 15 *

Other

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Circuit Author Views Rank Comments Marker
7 Segment LED Counter 917,140 214 *
AC Motor Speed Controller 384,408 29 *
Air Flow Detector 248,681 54 *
Digital Keypad Combination Lock 193,807 20
Low Voltage Alarm 226,211 58 *
Pine Racecar Victory Judge 100,505 1 *
Pulse Width Modulation DC Motor Control 644,419 94
Rain Detector 301,539 112 *
Simple Lie Detector 556,764 323
Simple Polarity Tester Dudley LeRoux 162,310 13 *
Simple Servo Controller 218,057 22 *
Simple Touch Switch NEW! 166,545 5 *
Simple Two Speed Contactor DC Motor Controller 201,753 21 *
Stepper Motor Controller 739,755 120 *
Time Delay Relay 551,680 88
Time Delay Relay II jawaharlal@excite.com 242,625 39 *
Touch Switch 286,326 51 *
Video Activated Relay 119,107 8 *
Video Stabilizer/MacroVision Removal Antti Paarlahti 176,985 10 *
Water Detector With Sump/Bilge Pump Controller 149,888 18 *
Wire Loop Alarm Alex Meaden 202,942 27 *

Power Supply

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Circuit Author Views Rank Comments Marker
12V To 24V DC-DC Converter NEW! 309,523 25 *
12VDC To 120VAC Inverter 1,510,682 691
6V to 12V Converter 521,602 121
Automatic 12V Lead Acid Battery Charger 931,265 248
Automatic Load Sensing Power Switch 163,976 16 *
Car Battery Charger 877,822 159 *
Dual Polarity Power Supply 367,116 84 *
Fixed Voltage Power Supply 307,398 52 *
High Current Power Supply 333,215 66 *
High Voltage High Current Power Supply 249,351 35 *
LASER Power Supply 291,833 28
Portable CD Player Adapter For Car 209,045 12 *
Power Supply 732,671 259 *
Solid State Tesla Coil NEW! 142,102 4
Solid State Tesla Coil/High Voltage Generator 438,325 51
Transformerless Power Supply 459,054 117 *
Voltage Inverter 333,435 51 *
Voltage Inverter II 198,643 19 *

Sound/Radio

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Circuit Author Views Rank Comments Marker
22 Watt Audio Amplifier 581,244 182
3 Watt FM Transmitter Rae XL Tkacik 329,734 83 *
50 Watt Amplifier 502,974 74
8 Note Tune Player 138,088 12 *
8 Watt Audio Amp 367,701 67 *
Aircraft Radio Communications Receiver 273,279 49 *
Crystal Radio 155,569 53 *
Digital Volume Control 334,511 47 *
Electronic Stethoscope 310,857 142 *
FET Audio Mixer 339,384 41
FM Transmitter 998,542 420
Guitar Fuzz Effect 242,727 54 *
Microphone Mixer Anatoly I. Shikhatov 246,862 26 *
Mono To Stereo Synthesizer oRbEq 130,008 18 *
One Tube Regenerative Radio NEW! 134,167 4 *
Op Amp Radio 382,506 80 *
Single Chip AM Radio NEW! 96,748 2 *
Single Chip FM Radio NEW! 167,832 1 *
Sound Level Meter 337,858 51 *
Stereo Tube Amplifier Weslee Kinsler 264,444 15 *
Tone Control 305,978 31
Transistor Organ 195,354 28

Telephone

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Circuit Author Views Rank Comments Marker
Cut Phone Line Detector 161,133 27 *
FM Telephone Bug 233,061 57
Phone Busy Indicator 211,485 24 *
Remote Telephone Ringer 115,968 3 *
Ringing Phone Light Flasher 213,237 35 *
Simple Phone Tap Derek Tombrello 380,731 98 *
Telephone Hold Button 126,441 10
Telephone Recorder 213,832 54 *


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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.