Stefan Sczekalla-Waldschmidt wrote:

> Andy Kunz wrote:
> >
> > >Can anyone suggest what i can do to improve the visibility, (which is
> > currently useless
> > >on 2 line mode).
>
> If the display is of extended temprature range, you possibly need a
> negative
> voltage for the contrast.
>
> I often connect the pot between -12V and +5 and the center tap to
> "Contrast in" (Vee ?? -  I dont remember the right name at the moment )
>

are the power rails for extended temp  range lcds at 0 and 5v or 0 and a
negative voltage?


But it is not an extended temperature display, (not meant to be anyway),