On Wed, Jun 18, 2014 at 04:44:49PM -0700, John Gardner wrote:
> BAJ's approach is the way I'd do it. If accuracy is wanted,
>=20
> have a look at the DS3231 & variants.

I don't know if it's the right solution because the application of the
sensor is unknown.

Detecting light and dark is one thing. Detecting dawn and dusk is something
completely different.

BAJ

--=20
Byron A. Jeff
Chair: Department of Computer Science and Information Technology
College of Information and Mathematical Sciences
Clayton State University
http://faculty.clayton.edu/bjeff
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.