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 Friday, January 24, 2020	12VDC Fluorescent Lamp Driver	63
	LASER Transmitter/Receiver	62
Yesterday Thursday, January 23, 2020	Low Voltage Alarm	470
	Time Delay Relay	422
Of All Time	12VDC To 120VAC Inverter	1,456,268
	FM Transmitter	962,202

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		203,998		61	*
Car Alarm Arming Horn Beep Canceller	bob	115,084		6	*
Wireless Auto Tachometer		316,296		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	142,576		29	*
Parallel (Printer) Port Interface		256,203		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		413,442		63	*
3 Channel Spectrum Analyzer		198,866		20
40W Fluorescent Lamp Inverter	Bart Milnes	305,764		60	*
Adjustable Strobe Light		280,617		36
Black Light		244,395		29
Colour (Sound) Organ		263,247		36
Electronic Dice NEW!		165,301		10	*
Fantastic Atom Expander		177,606		25
Flash Slave Trigger		195,716		18	*
Infa-Red Remote Control		603,211		216	*
IR Remote Extender NEW!		106,711		2	*
IR Remote Jammer	Carl	238,896		110	*
IR Remote Switch NEW!		135,792		9	*
LASER Transmitter/Receiver		381,614		92
LED Chaser		421,536		83	*
LED Metronome NEW!		87,356		3	*
LED Thermometer		187,959		22	*
Light/Dark Detector		286,023		90	*
Simple Colour Organ		120,793		10	*
Strobe Light		254,515		27	*
TRIAC Light Dimmer		475,538		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		329,585		122	*
Electromagnetic Levitator NEW!		124,977		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		886,525		214	*
AC Motor Speed Controller		360,153		29	*
Air Flow Detector		231,947		54	*
Digital Keypad Combination Lock		177,659		20
Low Voltage Alarm		206,758		58	*
Pine Racecar Victory Judge		86,775		1	*
Pulse Width Modulation DC Motor Control		624,444		94
Rain Detector		285,267		112	*
Simple Lie Detector		536,889		323
Simple Polarity Tester	Dudley LeRoux	142,211		13	*
Simple Servo Controller		200,490		22	*
Simple Touch Switch NEW!		150,528		5	*
Simple Two Speed Contactor DC Motor Controller		185,668		21	*
Stepper Motor Controller		712,082		120	*
Time Delay Relay		531,655		88
Time Delay Relay II	jawaharlal@excite.com	220,427		39	*
Touch Switch		268,765		51	*
Video Activated Relay		104,487		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	159,464		10	*
Water Detector With Sump/Bilge Pump Controller		130,532		18	*
Wire Loop Alarm	Alex Meaden	187,420		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		288,602		25	*
12VDC To 120VAC Inverter		1,456,268		689
6V to 12V Converter		483,183		121
Automatic 12V Lead Acid Battery Charger		899,815		247
Automatic Load Sensing Power Switch		145,154		16	*
Car Battery Charger		851,139		159	*
Dual Polarity Power Supply		351,808		84	*
Fixed Voltage Power Supply		288,946		52	*
High Current Power Supply		311,166		65	*
High Voltage High Current Power Supply		232,151		35	*
LASER Power Supply		271,467		28
Portable CD Player Adapter For Car		190,572		12	*
Power Supply		709,232		259	*
Solid State Tesla Coil NEW!		127,968		4
Solid State Tesla Coil/High Voltage Generator		410,534		50
Transformerless Power Supply		438,411		117	*
Voltage Inverter		313,935		51	*
Voltage Inverter II		181,949		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		560,287		182
3 Watt FM Transmitter	Rae XL Tkacik	308,850		82	*
50 Watt Amplifier		481,316		74
8 Note Tune Player		123,567		12	*
8 Watt Audio Amp		345,834		67	*
Aircraft Radio Communications Receiver		252,241		49	*
Crystal Radio		145,630		53	*
Digital Volume Control		310,086		47	*
Electronic Stethoscope		287,952		141	*
FET Audio Mixer		318,532		41
FM Transmitter		962,202		419
Guitar Fuzz Effect		222,194		52	*
Microphone Mixer	Anatoly I. Shikhatov	228,961		26	*
Mono To Stereo Synthesizer	oRbEq	111,931		18	*
One Tube Regenerative Radio NEW!		116,868		4	*
Op Amp Radio		358,731		80	*
Single Chip AM Radio NEW!		86,669		2	*
Single Chip FM Radio NEW!		149,069		1	*
Sound Level Meter		319,417		51	*
Stereo Tube Amplifier	Weslee Kinsler	246,658		15	*
Tone Control		284,140		31
Transistor Organ		176,298		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		145,871		27	*
FM Telephone Bug		217,651		57
Phone Busy Indicator		196,494		24	*
Remote Telephone Ringer		101,061		3	*
Ringing Phone Light Flasher		193,531		35	*
Simple Phone Tap	Derek Tombrello	345,519		98	*
Telephone Hold Button		110,867		10
Telephone Recorder		195,604		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.