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 Wednesday, June 20, 2018	Dual Polarity Power Supply	43
	12VDC To 120VAC Inverter	40
Yesterday Tuesday, June 19, 2018	Dual Polarity Power Supply	82
	12VDC To 120VAC Inverter	58
Of All Time	12VDC To 120VAC Inverter	1,413,248
	FM Transmitter	935,105

Auto	Back to the top of this document

Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Automatic Headlight Brightness Switch		189,747		61	*
Car Alarm Arming Horn Beep Canceller	bob	101,541		6	*
Wireless Auto Tachometer		297,385		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	132,842		29	*
Parallel (Printer) Port Interface		236,079		71

Light/Laser

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12VDC Fluorescent Lamp Driver		393,066		63	*
3 Channel Spectrum Analyzer		185,612		20
40W Fluorescent Lamp Inverter	Bart Milnes	290,060		60	*
Adjustable Strobe Light		263,270		36
Black Light		225,021		29
Colour (Sound) Organ		247,376		36
Electronic Dice NEW!		150,912		10	*
Fantastic Atom Expander		161,432		25
Flash Slave Trigger		181,765		18	*
Infa-Red Remote Control		581,346		216	*
IR Remote Extender NEW!		91,753		2	*
IR Remote Jammer	Carl	225,037		110	*
IR Remote Switch NEW!		122,006		9	*
LASER Transmitter/Receiver		363,143		92
LED Chaser		406,506		83	*
LED Metronome NEW!		80,806		3	*
LED Thermometer		176,039		22	*
Light/Dark Detector		275,319		90	*
Simple Colour Organ		110,881		10	*
Strobe Light		242,785		27	*
TRIAC Light Dimmer		455,617		55

Major Projects

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Computerize Your Room/Home		311,952		122	*
Electromagnetic Levitator NEW!		112,496		15	*

Other

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
7 Segment LED Counter		858,058		214	*
AC Motor Speed Controller		338,615		29	*
Air Flow Detector		219,542		54	*
Digital Keypad Combination Lock		163,083		20
Low Voltage Alarm		192,979		58	*
Pine Racecar Victory Judge		75,316		1	*
Pulse Width Modulation DC Motor Control		609,978		93
Rain Detector		271,889		112	*
Simple Lie Detector		517,345		323
Simple Polarity Tester	Dudley LeRoux	128,030		13	*
Simple Servo Controller		184,559		22	*
Simple Touch Switch NEW!		138,781		5	*
Simple Two Speed Contactor DC Motor Controller		175,510		21	*
Stepper Motor Controller		680,066		120	*
Time Delay Relay		512,210		88
Time Delay Relay II	jawaharlal@excite.com	204,495		39	*
Touch Switch		256,115		51	*
Video Activated Relay		93,866		8	*
Video Stabilizer/MacroVision Removal	Antti Paarlahti	146,054		10	*
Water Detector With Sump/Bilge Pump Controller		119,604		18	*
Wire Loop Alarm	Alex Meaden	177,447		27	*

Power Supply

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
12V To 24V DC-DC Converter NEW!		268,171		25	*
12VDC To 120VAC Inverter		1,413,248		688
6V to 12V Converter		449,990		121
Automatic 12V Lead Acid Battery Charger		872,694		246
Automatic Load Sensing Power Switch		133,418		16	*
Car Battery Charger		824,266		159	*
Dual Polarity Power Supply		318,811		84	*
Fixed Voltage Power Supply		277,383		52	*
High Current Power Supply		294,827		65	*
High Voltage High Current Power Supply		220,984		35	*
LASER Power Supply		252,404		28
Portable CD Player Adapter For Car		179,085		12	*
Power Supply		686,604		259	*
Solid State Tesla Coil NEW!		117,561		4
Solid State Tesla Coil/High Voltage Generator		387,029		50
Transformerless Power Supply		418,314		117	*
Voltage Inverter		303,595		51	*
Voltage Inverter II		172,570		19	*

Sound/Radio

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
22 Watt Audio Amplifier		545,092		182
3 Watt FM Transmitter	Rae XL Tkacik	295,280		82	*
50 Watt Amplifier		461,452		74
8 Note Tune Player		114,933		12	*
8 Watt Audio Amp		327,741		67	*
Aircraft Radio Communications Receiver		231,959		49	*
Crystal Radio		135,760		53	*
Digital Volume Control		295,862		47	*
Electronic Stethoscope		272,991		141	*
FET Audio Mixer		303,899		41
FM Transmitter		935,105		419
Guitar Fuzz Effect		204,900		52	*
Microphone Mixer	Anatoly I. Shikhatov	214,181		26	*
Mono To Stereo Synthesizer	oRbEq	97,882		18	*
One Tube Regenerative Radio NEW!		103,857		4	*
Op Amp Radio		343,533		80	*
Single Chip AM Radio NEW!		79,684		2	*
Single Chip FM Radio NEW!		132,634		1	*
Sound Level Meter		303,652		51	*
Stereo Tube Amplifier	Weslee Kinsler	231,805		15	*
Tone Control		267,615		31
Transistor Organ		162,604		28

Telephone

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Detailed View: On/Off
Circuit	Author	Views	Rank	Comments	Marker
Cut Phone Line Detector		136,629		27	*
FM Telephone Bug		201,774		57
Phone Busy Indicator		183,716		24	*
Remote Telephone Ringer		92,794		3	*
Ringing Phone Light Flasher		181,155		34	*
Simple Phone Tap	Derek Tombrello	328,993		98	*
Telephone Hold Button		97,127		10
Telephone Recorder		182,229		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.