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RSS > IR-Led, question

Dimka_Dimka	#1 11/11/2008 - 02h41 Top
Class : Apprenti Posts : 2 Registered on : 11/11/2008 Off line	Good day. Will be the following specs. of IR-Led good for FreeTrack: d=5mm, wave length=880nm (width=50nm) P=30mW Imax=50 Vforward =1.3V on I = 20mA Angle =30degrees Visual (Russian site): http://www.chip-dip.ru/product0/32441.aspx And will the increasing of Current up to max. for this Led (which is 50mA) another words decreasing calculated R improve tracking. Or leave it 20mA in calculations? Thank you.
tristan68	#2 11/11/2008 - 08h42 Top
Class : Electronicien en chef Posts : 651 Registered on : 10/07/2007 Off line	Hello dimkadimka This led seems well suited for freetrack. The only problem is its narrow beam. But you can widen the beam by sanding the led case a bit. About the current , it depends of your webcam sensitivity to IR. If you have a stock (unmodified) webcam, chances are you'll have to work at about 50mA, since your webcam won't be IR optimized. If you have an IR modded webcam, you'll usually find 20ma a more adequate value. You'll have to check and try. If you're unsure, i suggest you buy several resistors (they're very cheap components) to adjust your setting at the desired value. cya
Dimka_Dimka	#3 11/11/2008 - 18h08 Top
Class : Apprenti Posts : 2 Registered on : 11/11/2008 Off line	Thank you. 1.What angle of Led is optimum? What to search? 2.Is light flatten of led's cap needed while sanding?

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