RE: Baby paws?

["Ian B" <Ian@xxxxxxx>]

Err, not quite correct Mark.......

The 555 chip is triggered on the falling edge of an input signal, the
trigger(s) in baby paws. The chip then 'counts' until time is up and then
starts monitoring the trigger input again.

If the trigger is still activated when time is up then nothing changes. The
outputs still output.

As soon as the trigger pulse is reset after time up the circuit is ready to
be triggered again.

If the trigger is removed during the delay time the count will get to the
end and then be ready for another trigger.

Retriggering within the delay period is ignored - it does NOT reset the
timer.

There is a reset line which can be used to instantly reset the circuit but
at the moment this does not have a separate line out for connection.
Perfectly easy to do with a soldering iron though.

HTH

Ian

Hope to have a better explanation on my web site (www.mollyology.com) at
the
end of the weekend. Nothing there at all though at the moment.

> -----Original Message-----
> From: Pedro de Oliveira [mailto:oliveirp@xxxxxxx]
> Sent: 12 December 2001 14:52
> To: 'ukha_d@xxxxxxx'
> Subject: RE: [ukha_d] Baby paws?
>
>
> Right - got it now. So what you want is a delay of (ring length +
pause
> between rings+a bit)
>
> That sounds like it might have its uses for me - My HSP setup doesn't
work
> and with the "baby paws" I might be able to count the number
of
> calls I have
> missed during the day (with a little scripting)
>
> Cheers
> Pedro
>
> -----Original Message-----
> From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
> Sent: 12 December 2001 14:50
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Baby paws?
>
> Pedro,
>
> The "baby paws" output would go high on the start of the
first ring, but
> stay high for 10 seconds after the first ring ended. However, within
> this 10 seconds, the second ring would have happened, so it would stay
> high for 10 seconds from the end of that... by which time the third
ring
> would have happened....
>
> As such, its output = Homevision's Input goes high ONCE (at the start
of
> the first ring), and goes low ONCE (ten seconds after the end of the
> last ring.) This is true whether the phone rings for 2 seconds or 200
> seconds!
>
>
> As you say, the pathalogical case is that one person stops calling,
then
> another starts almost immediately. In this case, the output doesn't
> manage to go low, so the next call can't push it high again... The
setup
> I'm proposing doesn't cope with that, except that manual tuning should
> allow the time delay to be set to "just longer than the time
between two
> rings on the same call".
>
> Regards,
>
> Mark Harrison
> Head of Systems, eKingfisher
>
>
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> -----Original Message-----
> From: Pedro de Oliveira [mailto:oliveirp@xxxxxxx]
> Sent: 12 December 2001 14:36
> To: 'ukha_d@xxxxxxx'
> Subject: RE: [ukha_d] Baby paws?
>
>
> Mark
>
> That makes sense now.  Thanks for clearing that up.
>
> What would happen if the "baby paws" was set a delay of 10
seconds and
> the
> person ringing let the phone ring for say 18 seconds, would the macros
> trigger more than once (I assume you only want them to trigger once).
> If
> this is true and you set the delay to say 25 seconds and two people
> phoned
> within the 25 seconds would no macro trigger for the second call??
>
> Pedro
>
> -----Original Message-----
> From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
> Sent: 12 December 2001 14:33
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Baby paws?
>
> I'm going to be using it between the "Ring Indicator" pin on
an old
> (therefore cheap) modem, and Homevision.
>
> As such, when the phone starts rining, one of the HV input ports will
go
> high, trigerring a macro. When the phone stops ringig, the input port
> will go low, triggering a different macro.
>
> Without the device, the macros would all trigger on _each_ "bring
noise"
> rather than just once.
>
> Yes, I know I could sort this out with use of HV timers and flags, but
> the device is so cheap that I'd rather pay for it than spend an
evening
> mucking around with HV programming.
>
>
> Mark Harrison
> Head of Systems, eKingfisher
>
> -----Original Message-----
> From: Pedro de Oliveira [mailto:oliveirp@xxxxxxx]
> Sent: 12 December 2001 14:22
> To: HA (ukha_d@xxxxxxx)
> Subject: [ukha_d] Baby paws?
>
>
> I've just been reading the automatedhome news page and found
"baby
> paws".  What exactly could it be used for?  I'm sure there is a
feature
> rich idea behind it, but I can't put my finger on what a device that
> delays a signal would be useful for?
>
> Am I missing something - please enlighten me
>
> Cheers
> Pedro
>
> For more information: http://www.automatedhome.co.uk
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