>>I recently purchases an LCD display, 16x2, from BG Micro. It has a
>>backlight, but I can't seem to get it working (the display itself works
>>fine). It looks like there is a seperate V+ and GND wire, but when I feed
>>it 5v, nothing happens. I am afraid to feed it more because I don't want
>>to damage it, plus I assume i'd at least see a tiny glow.. Any information
>>you can offer as to the typical function/requirements of LCD backlights
>>such as this would be appreciated. Thanks everyone...
>
>Is the backlight an LED or EL?  If it's EL you'll need to feed it around
>100V AC to see it light up.

If the back light is LED... you might need a new display...  An LED back lit
display needs a current limiting resisor in series with it.  The data sheet
should tell you how much current should be fed to it and you should be able
to work out the resistance from there.  You need to tell us what the model
is, or at least a data sheet to look at.  Without that, we can't really say.


Brian.

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