14 Apr
2008
14 Apr
'08
4:41 p.m.
Hi, all,
I'm looking to throw in a current limiting resistor on an LED backlight for
an LCD. I'm going through my stash of parts and fished out some power
resistors of a style I'm not familiar with. I think they might be suitable,
but I can't tell for certain.
The LED backlight pulls about 800mA @ 4.2V. The resistors I have are
marked "WW2 4 Ohms 5%". The body is about the size of a 1/2W carbon-
omposite resistor, all black, with the legend in white paint. I'm
guessing that the "WW" means wire-wound, but the resistor looks a
little small for me to be sure that "2" might mean 2W (even though I
only need 1W).
From the description of the resistor style, can anyone
tell what the
wattage might be?
Thanks,
-ethan
--
Ethan Dicks, A-333-S Current South Pole Weather at 14-Apr-2008 at 23:20 Z
South Pole Station
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Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html