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Re: Re: Could be useful project, anyone tried this?
Gary wrote:
> Hi Kim,
>
> How did you interface the RF part of the doorbell? did you have to
> decode it?
I didn't. I simply connected across the doorbell's speaker, and
smoothed the audio signal to drive a transistor. There wasn't much of
an option, as the whole thing was on a single chip with connections for
battery, speaker and a coil antenna. Fine for a single doorbell, but if
you had multiple buttons, you'd need a bell for each one.
If you want to get at the codes, you're either going to need to hack a
less integrated doorbell (for reference, mine was a cheapo B&Q one), or
find some sort of general-purpose 433MHz(?) receiver...
Kim.
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