Re: [NTLK] Higher sampling rate

From: John M. Powell (iwillbefreedotcom_at_earthlink.net)
Date: Mon Oct 08 2001 - 11:26:08 EDT


> > They show 400ma drain with that card (active).
> This I don't completely understand. Did you plug a DAQ card into
> the Newton and looked onto the current consumption in Avi's or BattMon?
What
> error msgs got you on the card insertion?

Off the top of my head, this was the current drain they showed
this card used in active state.

> > I seem to remember the limit being 1000 between the two PCMCIA slots and
>> the interconnect port. This correct?
> I can't imagine that 1A has been specified as maximum current rating for
the
> Newton PCMCIA slots. This would allow maximum 60min, probably much less
> until the accu is empty. I've tried the famous Farallon 2-port hub with
the
> internal 1100mAh Newton accu. It took 500mA out of the accu and after a
> quarter hour the Newton stated "accu going empty, recharge soon...". And
the
> accu became quite warm.

Found it - from the Interconnect docs... pg 11. Concerning the 5 volt power
supply, total budget is 500mA, which must be shared with the PC cards. Max
allowed for the interconnect is 100mA. Since this card uses 400mA in
operation
(http://www.digigram.com/tech_specs/getinfo.htm?prod_key=9000) it would
probably
be unwise to even try it. It would certainly be pushing the envelope.

John

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