Re: Could be useful project, anyone tried this?

[Kim Wall <kim@xxxxxxxxxxxxxxxxxx>]

Gary wrote:
> http://www.electronicsinschools.org/page.php?m=106&ps=103&p=414

> Anyone know how to interface it or tried something like it, the
> website already has the timings, they seem a bit like X10?

Not quite what you're thinking, but I have a wireless doorbell
interfaced with a computer (via some intermediate PIC-based serial
comms, but it originally connected directly to a pin on the parallel
port) by simply rectifying, smoothing and driving a transistor with the
audio output of the bell unit.  The standard "ding-dooooong"
sound
results in the open collector going low for about 2 seconds.

For more general use, you'd really want to get at the codes instead of
having one doorbell per signal - unfortunately, at least in my doorbell
receiver, everything's on a single chip under a blob of epoxy...


Kim.


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