RE: Light sensitive curtain control module required

["Keith Doxey" <ukha@xxxxxxxxxxx>]

> > They need a pulse for about a minute
>
> Mr Doxey could do you a quick diagram I'm sure.  He built me an
> analogue and digital light detector a few years ago.
>
> Keith?
>

Had a major search of all hard drives and can only find the GIF I gave you
as the connection diagram. Image dated 27 OCT 1998 so it is almost SEVEN
YEARS AGO !!!!

Dont know where the original diagram went, was probably written on a piece
of paper that has long gone. The sensor I built for you was based on a
design I found on the web somewhere.

If I was building a new one now it would be completely different, MUCH
smaller and much more flexible..... and cheaper.

All I would use would be a PhotoCell, PIC and a couple of connectors. For
the application David wants, the PIC could take care of all timing of
pulses
and a quich connection to a PC could allow changes to light levels and
pulse
duration etc.

Dont have time to actually build on at the moment though.

Regards

Keith