Thanks all for the helpful pointers and input. Following up on the leads I
also happened on this app note for the 2408 that's similar but appears to be
a bit easier for me to understand:
http://www.maxim-ic.com/app-notes/index.mvp/id/4849 .
I should be able to get something going from all this, thanks!
On Mon, Sep 26, 2011 at 9:48 AM, p4trykx <[email protected]> wrote:
> Dnia 26-09-2011 o 08:02:52 Don Veino <[email protected]>
> napisał(a):
>
>
> You can use DS2408 it has 8 IO ports. There are also smaller chips but
> DS2408 is easier to solder.
> http://datasheets.maxim-ic.com/en/ds/DS2408.pdf
> There's a schematic on page 30. It's parasite powered but if you got
> separate power just instead of the diode bat54 connect +5V
> The you can use some kind of switch that would be touched by the door when
> they close. You can also use reed switch and put a magnet on the door.
> There is no physical contact so this switch would be more durable.
> http://en.wikipedia.org/wiki/Reed_switch
>
> http://datasheets.maxim-ic.com/en/ds/DS2413.pdf
> This also has a schematic on page 1 (left lower corner)
>
>
>
> --
> p4trykx
>
>
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