On Wed, May 07, 2003 at 12:42:16AM -0500, Picdude wrote:
> >
> > If you do, you'll probably need to change your display loop to update
> > TRISB instead of PORTB.  I found that 1 transistor drop (from the PNP)
> > was higher than the "on" output of the PIC pins driving the segments,
> > so that trying to drive segments I wanted off actually turned them on
> > verry faintly.
>
> Not sure what you mean here.  Why TRISB?  I'm assuming the OC output will
> float itself when "off" (high),

TRIS*B*, for your segments.  If you change to common anode.  Because:

        [PIC pin HIGH>---/\/\/----|<----[PNP collector]...[VCC]

will faintly light the segment.  At least it did when I made the same
change.  If you switch between off/hi-z you get "bright" and "dark" but
off/on gives you "bright" and "very faint".

--
Ben Jackson
<ben@ben.com>
http://www.ben.com/

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