RE: Probe Hub Update

["Steve Morgan" <wormpurple@xxxxxxx>]

A further advantage I see monitoring of the output is that it could be
used to monitor any dimmer or switch.

Getting the brightness is indeed a problem since you're limited in the
number of ports available. One option might be to implement a
voltage-to-frequency convertor where the interval between pulses is
proportional to the average voltage. HV could then be used to measure
the time between pulses to estimate the brightness. The disadvantage
being that it would tend to be fairly slow.

Steve


> -----Original Message-----
> From: Graham Howe [mailto:graham@xxxxxxx]=20
> Sent: 14 October 2003 06:54
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] Probe Hub Update
>=20
>=20
> The momentary switch is no use, for one thing there can be=20
> several of them, I have one LD11 with 3 switches. The other=20
> problem is that they do not do 0% and 100%, a quick press=20
> will send the unit to 0% if it is greater than 0, or back to=20
> it's last lit level if it is at 0.
>=20
> I agree with Steve that what is needed is something that can=20
> determine the whether there is a an outout voltage present,=20
> in other words the probe would need to be in parallel with=20
> the lights. Like I said, ideally I would like to know the=20
> voltage there to determine brightness level, but this would I=20
> assume be impossible with digital ports on HV
>=20
> Graham