| -----Original Message-----
| From: pic microcontroller discussion list
| [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of rrc124+@PITT.EDU
| Sent: Sunday, July 20, 2003 8:15 AM
| To: PICLIST@MITVMA.MIT.EDU
| Subject: [EE]: LCD backlight requirements
|
|
| 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...

Hi,

I was once viewing several datasheets whilst selecting LCDs for
a new project. I cant remember where I saw it, but I did come
accross an LCD which you could turn the backlight on or off with
a command similar to those used to initialise the lcd, clear the
screen etc etc... perhaps have a peek in the datasheet - it may
be that the lcd backlight is disabled by default and that you
need to send an init command to make it come on, after you have
applied power to the lcd. It is unlikely that the backlight would
use more than 5 volt assuming the size of the lcd and that it is
a character lcd.

Regards,
Andre Thomas

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