"Mark Wagner" <mar### [at] gtenet> wrote in message
news:3a960b83@news.povray.org...
> Chris Huff wrote in message ...
> >...but I don't
> >recognize the 8-pin DIP IC. That and the other components don't
look
> >like they belong on a power-supply board. There is something
labelled
> >"door"...maybe a trigger for a garage door opener, or an alarm for
when
> >a door gets opened, or a doorbell. The last two make the most
sense...
>
>
> It appears to be a doorbell.  According to the Chip Directory, the
2811 IC
> is:
>
> 2811    HT-2811    sound    Door Bell, Ding Dong    Holtek*
>

That's right, and the onboard rectifier allows for battery or "bell
txformer" operation.


--
Alf

http://www.peake42.freeserve.co.uk/
http://ourworld.compuserve.com/homepages/Alf_Peake/
gw3### [at] thersgbnet

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