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Infrared Led Diode
how optomechanical ( Track ball ) mouse works....????
there is a LED (light emitting diode) & a sensor (which sense infrared light) for each vertical & horizontal movement
I want to know that how a vertical sensor knows that mouse pointer should go in upward direction or in downward direction..........????????
and same how a horizontal sensor knows that mouse pointer should go in left direction or in right direction..........?????????????
Plz suggest.......thankssssssss
In vertical motion each time wheel goes up or down it works as obstacle between LEd & it's sensor
my question is that how sensor knows that wheel is moving in upward direction or downward
There are two wheels with holes that gets rotated, one horizontal and one vertical.
The direction of the spin determines whether the cursor is going up or down, left or right.
The scroll wheel on an optical mouse works the same way.
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10 Pcs 10mm 300mw Luminous Diode Infrared IR LED Night Vision 850nm |  |
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US $1.65 | 13d 2h 13m |
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5x TSAL6400 Vishay 5mm Infrared LED; 940nm IR Diode Wii | |
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US $4.83 | 7d 17h 1m |
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5mm INFRARED IR LED Light Emitting Diode 850nm - 10 PCs | |
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US $2.87 | 14d 9h 2m |
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3mm LED infrared emitter and IR receiver diode.20pairs(40pcs) | |
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US $6.99 | 2d 6h 32m |
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20 X Infrared 5MM Round Emitting Diode IR LED Light | |
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US $1.40 | 21d 16h 30m |
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12pcs 5mm 940nm IR infrared launch diode LED Lamp New | |
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5pcs TSAL6400 ORIGINAL Vishay 5mm Infrared LED 940nm IR Diode | |
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US $4.83 | 20d 11h 58m |
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(100 PCS) 5mm Infrared receiver diode IR LED | |
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100 pcs 3MM Infrared receiver diode IR LED | |
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US $8.88 | 17d 16h 36m |
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IR LED 100pcs 3MM 940nm infrared IR launch diode L3IR5 | |
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US $8.88 | 17d 12h 12m |
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SPECO INFRARED LED ILLUMINATOR $86.99 SPECO INFRARED LED ILLUMINATOR |
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LightEmitting Diode $68.51 Light emitting diode. Oleg Losev, List of LED failure modes, Organic light emitting diode, Miniature light emitting diode, Solid state lighting, LED lamp, LED power sources, Electrical polarity of LEDs, LED circuit, LED as light sensor Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 74 Publication Date: 2009/10/08 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches |
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2130IR Infrared LED Flashlight $16.94 2130IR Infrared LED Flashlight Mini Flasher™ 2130IR Infrared LED FlashlightThe 2130 is a hi-visibility LED flashlight that can be seen over half a mile away. Just twist to turn on. It is perfect for night-time bicyclists and joggers. It is powered by 2 L1154 1.2V alkaline coin cells that last over 100 hours before replacing. Because the Mini Flasher 2130 is submersible, it is also ideal for marking your dive team.For use with special NVG equipment |
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Pacer 12 Diode LED Light $12.95 LED (Light Emitting Diode) lighting gives extra brightness and longer life than conventional bulbs. Pacer's LED Light Kit works well as a third brake or turn signal indicator. It is actually 12 LED lights within 1 larger light. The compact, slimline design allows a great variety of mounting location options. Includes one light. Mounts with two-sided tape Simple two wire installation Long life Low power draw Each light is 4 5/8'' L x 7/16'' W x 3/4'' H. Available in Red, Amber, White and Blue* *White and blue lights are an additional $2.00 |
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Pacer 20 Diode LED Light $15.95 LED (Light Emitting Diode) lighting gives extra brightness and longer life than conventional bulbs. Pacer's LED Light Kit works well when a light with extra length is needed. It is actually 12 LED lights within 1 larger light. The compact, slimline design allows a great variety of mounting location options. Includes one light. Mounts with two-sided tape Simple two wire installation Long life Low power draw Each light is 8'' L x 5/8'' W x 3/4'' H. Available in Red, Amber, White and Blue* *White and blue lights are an additional $6.00 |
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Kuryakyn L.E.D. Turn Signal Diode Kit $7.99 This kit is required when installing L.E.D. lights as turn signals on a motorcycle with a single turn signal indicator light. If this Diode Kit is not installed, power will back feed across the indicator light & all turn signals will flash at once. |
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40 Meters Infrared Lighting with 48pcs Infrared LED Lamp $26.09 FeaturesInfrared lightingWith 48 high-power infrared LED lampIrradiation distance of 40 metersDegree angle lighting option 60/30/15Suitable for long-distance infrared illuminationSpecificationInfrared lightingWith 48 high-power infrared LED lampIrradiation distance of 40 metersDegree angle lighting option 60/30/15Suitable for long-distance infrared illumination |
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1/3 sony 420TVL CCD 24 LED Infrared Surveillance CCTV Camera $27.68 1/3sony 420TVL,24 LED Infrared Surveillance CCTV Camera |
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Kuryakyn Diode Kit $6.76 " This kit is required when installing LED. lights as turn signals on a motorcycle with a single turn signal indicator light If this diode kit is not installed, power will back feed across the indicator light and all turn signals will ff" |
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T90C10 Fixed Dome IR-LED - infrared illuminator $439.99 AXIS T90C10 Fixed Dome IR-LED - Infrared illuminator - white - for AXIS P3343-VE P3344-VE P3346-VE |
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T90C20 Fixed Dome IR-LED - infrared illuminator $409.99 AXIS T90C20 Fixed Dome IR-LED - Infrared illuminator - white - for AXIS P3343-VE P3344-VE P3346-VE |
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Savio RAD1000 4W LED Light (17 Diode) $111.15 Enhance the mood of your water garden while highlighting points of interest with an illuminating light display of energy efficient LED lights from Savio. LED lights never get hot to the touch safe for fish and plants Available in two sizes rugged professional housing units are backed by Savio s quality and a oneyear warranty. LED New Technology An excellent way to save money and energy Radiance LED lights can be added as accents in or out of the water. Ideal for waterfalls and semiaquatic environments LED lights emit almost no heat are incredibly energy efficient delivering remarkable brightness and longevity. 4W LED Light (17 Diode). Durable construction. Can be used in or out of water. 20 Cord. |
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NEW InfraRed IR 48 LED Illumination Box For CCTV Camera $16 NEW InfraRed IR 48 LED Illumination Box For CCTV Camera |
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30 LED IR INFRARED WATERPROOF CCTV SECURITY CAMERA $22.04 Wholesale - 30 LED IR INFRARED WATERPROOF CCTV SECURITY CAMERA |
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36 LED Security Camera IR Infrared Illuminator Board $6.63 35 LED 5mm Infrared For Camera IR 60 Degree Bulb |
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CLOVER IR010 Infrared LED Lights $37.99 Type: IR Illuminator Features: 20ft range - 20 super Infrared LEDs Parts: 1 year limited Labor: 1 year limited |
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ZParks video - kas ir LED diodes?
Finding an LED's foward bias and current requirements?
I have a bag of bargain infrared LEDs that I'm trying to wire. I have 3 legs composed of 6 parallel LEDs. The legs are connected to one another in series. The LEDs will be epoxied into an acrylic sheet. I have an old AC adaptor that gives off 5.3V with no load and is rated for 1 amp output. I also have a 25-Ohm Potentiameter and an assortment of resistors.
I don't know the forward bias voltage or the current requirements. My RadioShack multimeter reads about 1.1V on the diode test, but I have yet to see them draw less than 1.2V in various experiments I have done.
How can I determine the current and voltage I can safely run into these LEDs? I'm trying to optimize brightness without wearing them out too quickly.
Thanks!
Also, the specs for a Radio Shack IR LED are 100mA and 1.2V.
A good target current value for an unknown LED is 10 mA. The drive voltage will depend on the color, with red requiring lower voltage than yellow or green. Use your AC adaptor with a series resistance of about 400 ohms to check your LED's; that will supply enough current to light them without cooking them. Running LED's in parallel is a bad idea; the current between them is likely to be unbalanced. If you want to use your adaptor to run eighteen of the things, I suggest wiring them in series pairs, along with a suitable current controlling resistor (about 200 ohms) for each pair, which will result in a total current draw of about a tenth of an amp, for which your adaptor will do nicely.
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