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RSS > Finding the right combo.

P1nts3L	#1 13/12/2014 - 22h24 Top
Class : Apprenti Posts : 2 Registered on : 13/12/2014 Off line	Hello, So im here to ask for help. What im trying to do is, building the headset. I have 3x LD271 5mm IR 950nm 130mA 50deg And 3 power supplies to use, which one of them would be the best ? The power supplies are: 1x Old Nokia phone charger. Output: 3,7V 355mA/ 1,3VA 1x Old Nokia phone charger. Output: 5.3V 500mA And a USB cable from an old webcam.. that i would use together with Samsung Travel Adapter wall plug.. Output of the adapter is: 5.0V 2.0A I have actually no knowledge of the ohms, amps, milliamps.. etc. Real dummy here .. I also know that i need a right resistor for this build, so perhaps you could help me find the right one. Any kind of help would be appreciated. EDIT: So according to this, i need a 9.1 ohm 5% resistor. What if the local store dont have this kind of a resistor, are there any alternatives ? Edited by P1nts3L on 14/12/2014 at 11h16.
Steph	#2 14/12/2014 - 22h35 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	10, 12, 15ohm will be ok with travel adapter wall plug 5.0V 2.0A. Edited by Steph on 14/12/2014 at 22h37.

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