RE: Re: Could be useful project, anyone tried this?

["David Ward" <d.ward@xxxxxxxxxx>]

The heap doorbells I have incorporate a separate RF receiver,  the
decoder is a 'epoxy blob' but the RF section is a separate PCB with
handily marked +3V GND and Data :)

Alternatively you could look at the RF modules from RFXCOM

Dave

_____

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
Of Gary
Sent: 26 November 2006 14:05
To: ukha_d@xxxxxxx
Subject: [ukha_d] Re: Could be useful project, anyone tried this?



Hi Kim,

How did you interface the RF part of the doorbell? did you have to
decode it?

Regards

Gary

--- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
, Kim
Wall <kim@...> wrote:
>
> Gary wrote:
> > http://www.electronicsinschools.org/page.php?m=106&ps=103&p=414
<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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