Electronic Circuits

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, July 25, 2017	Dual Polarity Power Supply	79
	Automatic 12V Lead Acid Battery Charger	54
Yesterday Monday, July 24, 2017	Dual Polarity Power Supply	109
	12VDC To 120VAC Inverter	67
Of All Time	12VDC To 120VAC Inverter	1,384,638
	FM Transmitter	919,828

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		184,393		61	*
Car Alarm Arming Horn Beep Canceller	bob	96,735		6	*
Wireless Auto Tachometer		291,279		58

Computer

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computer Controlled Frequency Counter/Logic Probe	Richard van Wyk	128,163		29	*
Parallel (Printer) Port Interface		230,633		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		385,105		62	*
3 Channel Spectrum Analyzer		178,012		20
40W Fluorescent Lamp Inverter	Bart Milnes	284,030		60	*
Adjustable Strobe Light		255,969		36
Black Light		218,248		29
Colour (Sound) Organ		240,582		36
Electronic Dice NEW!		145,961		9	*
Fantastic Atom Expander		154,950		25
Flash Slave Trigger		176,475		17	*
Infa-Red Remote Control		572,818		216	*
IR Remote Extender NEW!		85,831		2	*
IR Remote Jammer	Carl	218,539		110	*
IR Remote Switch NEW!		115,845		9	*
LASER Transmitter/Receiver		356,033		92
LED Chaser		398,604		83	*
LED Metronome NEW!		76,411		3	*
LED Thermometer		169,993		22	*
Light/Dark Detector		268,525		89	*
Simple Colour Organ		106,606		10	*
Strobe Light		237,567		27	*
TRIAC Light Dimmer		446,861		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		305,795		122	*
Electromagnetic Levitator NEW!		106,580		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		845,173		214	*
AC Motor Speed Controller		328,724		29	*
Air Flow Detector		213,665		54	*
Digital Keypad Combination Lock		157,501		20
Low Voltage Alarm		186,119		58	*
Pine Racecar Victory Judge		71,094		1	*
Pulse Width Modulation DC Motor Control		600,853		93
Rain Detector		266,143		112	*
Simple Lie Detector		508,374		323
Simple Polarity Tester	Dudley LeRoux	122,343		13	*
Simple Servo Controller		178,162		22	*
Simple Touch Switch NEW!		133,479		5	*
Simple Two Speed Contactor DC Motor Controller		170,290		21	*
Stepper Motor Controller		663,242		120	*
Time Delay Relay		501,591		88
Time Delay Relay II	jawaharlal@excite.com	198,340		39	*
Touch Switch		249,715		51	*
Video Activated Relay		88,929		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	140,347		10	*
Water Detector With Sump/Bilge Pump Controller		114,084		18	*
Wire Loop Alarm	Alex Meaden	171,979		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		258,733		25	*
12VDC To 120VAC Inverter		1,384,638		687
6V to 12V Converter		436,313		121
Automatic 12V Lead Acid Battery Charger		853,563		246
Automatic Load Sensing Power Switch		127,471		15	*
Car Battery Charger		807,573		159	*
Dual Polarity Power Supply		295,897		84	*
Fixed Voltage Power Supply		271,201		52	*
High Current Power Supply		287,922		64	*
High Voltage High Current Power Supply		215,421		35	*
LASER Power Supply		244,872		28
Portable CD Player Adapter For Car		172,596		12	*
Power Supply		673,924		259	*
Solid State Tesla Coil NEW!		110,599		3
Solid State Tesla Coil/High Voltage Generator		375,711		50
Transformerless Power Supply		410,736		117	*
Voltage Inverter		296,573		51	*
Voltage Inverter II		168,253		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		534,664		182
3 Watt FM Transmitter	Rae XL Tkacik	287,400		81	*
50 Watt Amplifier		450,430		74
8 Note Tune Player		110,217		12	*
8 Watt Audio Amp		319,233		67	*
Aircraft Radio Communications Receiver		223,887		49	*
Crystal Radio		131,042		53	*
Digital Volume Control		288,525		47	*
Electronic Stethoscope		264,142		141	*
FET Audio Mixer		293,824		40
FM Transmitter		919,828		418
Guitar Fuzz Effect		197,924		52	*
Microphone Mixer	Anatoly I. Shikhatov	206,702		26	*
Mono To Stereo Synthesizer	oRbEq	92,799		18	*
One Tube Regenerative Radio NEW!		97,474		4	*
Op Amp Radio		332,858		80	*
Single Chip AM Radio NEW!		75,109		2	*
Single Chip FM Radio NEW!		125,556		1	*
Sound Level Meter		296,648		51	*
Stereo Tube Amplifier	Weslee Kinsler	225,679		15	*
Tone Control		259,446		31
Transistor Organ		156,388		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		132,674		27	*
FM Telephone Bug		196,353		57
Phone Busy Indicator		175,068		24	*
Remote Telephone Ringer		88,707		3	*
Ringing Phone Light Flasher		174,389		33	*
Simple Phone Tap	Derek Tombrello	324,000		98	*
Telephone Hold Button		92,793		9
Telephone Recorder		176,956		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.