[mythtv-users] Netbook as low-power combined back-end / front-end?

[rsh1k]

On Thu, Aug 30, 2012 at 2:10 AM, Simon Hobson <linux at thehobsons.co.uk> wrote:
>
> BTW - most intelligent chargers will not work in this situation. They will
> see the current being drawn by the load as charging current and hence the
> intelligent features just won't work properly - they will think they are in
> the bulk charge regime all the time.
>
>
> Incidentally, this is the basis of a double-conversion UPS which is used
> where you want clean regulated power as well as backup. Power always goes
> through the AC-DC and DC-AC conversions and so the output is completely
> separated from disturbances on the input. The batteries may be connected
> directly across the DC link, or there may be a separate DC-DC converter
> involved (as is the case with the unit we have at work).
> As you point out, the downside is the extra losses. They are typically rated
> at 95%+ efficiency - so a few % of the load gets added in conversion losses.
> --
> Simon Hobson


Thanks for the detailed reply, Simon!   I hadn't even thought about
the computer's load fooling the protection circuits of the charger...

- rsh1k