Graham and list,
The following also applies to any PC/CF
cards, USB accessories such as thumb drives,
hard drives, keyboards, printers, and such,
and other connectivity options:
Each device uses BrailleNote's power to
operate, especially USB devices. When the
device is inserted, it presents itself as
whatever it is intended for such as network
card, USB thumb drive, etc. (the following
only applies to USB) When a device is
inserted, it uses minimal power. By the
permission of Windows CE, it iwithitches to
high power mode (same is true with some CF
cards). SD cards does not take too much
power, although some cards, especially that
runs faster than ordinary SD cards, does tend
to draw more power. In the following
paragraph, I'll use a USB thumb drive as an
example:
When a thumb drive is inserted, it presents
itself as a "hard disk." At this time, it
uses less power (100 milliamps to be exact).
It then asks BrailleNote if it can use more
power. BrailleNote determines the current
battery level. If it finds that it has
enough power, then it will allow the thumb
drive to operate at high power, thus using
BrailleNote's memory (500 milliamps). If the
BrailleNote finds that it does not have
enough power, the follow message is given
(slightly modified):
"The unit does not have enough battery power
to operate this device. Do you still want to
use this device?"
If you say "yes," BrailleNote is then forced
to operate the device with high power. If it
is "no," then it disregards its request for
more power. A typical device uses 500
milliamps of power. The greater the number,
the more power it uses, thus shortening the
battery life.
I hope this explanation did not sound too
techie (if it was, let me know; probably
Andy, Mickey or others will be able to answer
this one; grin).
HTH,
Joseph
Skype: joslee22590
----- Original Message -----
From: "Graham Stoodley" <[EMAIL PROTECTED]
To: "Braillenote List"
<[email protected]
Date sent: Thu, 28 Dec 2006 20:50:00 -0500
Subject: Re: [Braillenote] SD card remaining
in the slot?
I am curious about this issue of leaving
one's SD card in the slot of
the BrailleNote. Why should doing so have
any effect on battery life
in the BN, since the memory in the SD card is
nonvolatile and will
remain undamaged while the SD card is out of
the BN. Unless you are
using it, why should having it in the slot of
the BN put more of a
strain on its battery? Does anyone have the
real answer to this
oft-quoted injunction about battery life and
the SD card?
----- Original Message -----
From: "Brian Lingard" <[EMAIL PROTECTED]
To: "'Braillenote List'"
<[email protected]
Sent: Thursday, December 28, 2006 4:05 PM
Subject: RE: [Braillenote] SD card remaining
in the slot?
Ottawa Canada
Far as I know, you can leave your card in the
slot forever and
the spring will be ok. However you should
not leave your card in
the slot when not in use and running on
battery power as this
will drain the battery quicker than without
the card in place.
They make much better springs these days than
they do batteries!
Brian
--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.432 / Virus Database:
268.15.29/607 - Release Date:
28/12/2006 12:31 PM
___
To leave the BrailleNote list, send a blank
message to
[EMAIL PROTECTED]
To view the list archives or change your
preferences, visit
http://list.humanware.com/mailman/listinfo/br
aillenote
___
To leave the BrailleNote list, send a blank
message to
[EMAIL PROTECTED]
To view the list archives or change your
preferences, visit
http://list.humanware.com/mailman/listinfo/br
aillenote
___
To leave the BrailleNote list, send a blank message to
[EMAIL PROTECTED]
To view the list archives or change your preferences, visit
http://list.humanware.com/mailman/listinfo/braillenote
