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[DPRG] reading a Cds via Port E on a HC11

Subject: [DPRG] reading a Cds via Port E on a HC11
From: montgomery f. tidwell mtidwell at practicalmatters.com
Date: Sat Jun 23 14:08:57 CDT 2001


Ralph Tenny wrote:
> Reply #2
> Are you getting acceptable line recognition using an LED with a Cds
> sensor? My impression of Cds devices has been (relatively) low sensitivity
> and slow operation.

using my multimeter, i get 6 Ohms over a white line, 50 over a black
surface, and 15 over my medium shade fake wood desk. the Cds/LED are
just over a 1/4 inch over the surface.


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