[Oeva-list] Watts up?

Gary Graunke gary at whitecape.org
Mon Apr 11 10:18:36 PDT 2011


Oops--I usually correct others for the same mistake. Yes, I meant watts:   
12-15 WH/h.

Gary

On Monday, April 11, 2011 09:44:16 AM Jeff Kim wrote:
> Power is a *rate*.  Kilowatt-hours (kWh) and watt-hours (Wh) are quantities
> of energy. If they were giving us a rate (power), they probably meant 12-15
> watts.
> 
> As far as the "screensaver," they were probably referring to something that
> temporarily shuts the screen down until it is touched (used) again.
> 
> Jeff
> 
> On Mon, Apr 11, 2011 at 9:08 AM, Gary Graunke <gary at whitecape.org> wrote:
> > I bet they meant standy power is 12-15 Watt-hours. (not KWH).
> > 
> > Screensavers are something left over from CRT monitors, where the
> > phosphor would wear out if left standing with the same image. No need to
> > do that today!
> > 
> > Gary
> > 
> > On Monday, April 11, 2011 08:02:29 AM D K wrote:
> > > Asked this powerconsumption question to Blink - got interesting reply,
> > > still wondering what they meant:
> > > 
> > > Hello Dima,
> > > 
> > > Yes, the screen always stays on.  We are currently working on a
> > > solution for a ‘screensaver’ mode, but I can’t give you a date as to
> > > when this
> > 
> > will
> > 
> > > happen.
> > > 
> > > The power consumption is *approximately 12-15 kWh.*
> > > 
> > > 
> > > 
> > > 
> > > Dmitry
> > > 
> > > On Tue, Apr 5, 2011 at 7:39 PM, Steve's Account <stevel at fern.com> wrote:
> > > > > From: D K <dimakukushkin at gmail.com>
> > > > > Subject: [Oeva-list] Blink charger - screen always on?? wastefull,
> > > > > 
> > > > >       isn't it?
> > > > > 
> > > > > Got my BLINK charger installed today.Was surprised by absence of
> > > > > screensaver.  I yet have to find a way to measure power sonsumption
> > 
> > of
> > 
> > > > idle
> > > > 
> > > > > mode, but I bet it's around 30watt.
> > > > 
> > > > I'll take that bet!
> > > > 
> > > > Depending on the type of display, a small LCD, backlit by an LED,
> > > > especially
> > > > one displaing a static message, can run on vanishingly small amounts
> > > > of power.. if you don't have a CPU chip running, too (hence the
> > > > static message.) it's going to be closer to 10 watts... and
> > > > carefully done, an average current of 1 watt is doable...
> > > > 
> > > > And in a lot of cases, such a display won't be much more than the LED
> > 
> > you
> > 
> > > > need to say "I'm on", in any case.
> > > > 
> > > > Steve
> > > > 
> > > > _______________________________________________
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> > 
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