Hi Kristen and list,
I did some research about milliamp (via Google, Wikipedia and Oxford
Dictionary), and here's what I found:
An amp, properly called "ampere," is the unit of measurement of electric
current. In other words, it measures how much electric current goes through
electric circuit (more technically, conductors) in one second. A milliamp
(MAh for short) is one thousandth of an amp.
Er, any electrical engineers or people who are into physics, is there a
simpler explanation...
Hope it is simple enough.
Cheers,
Joseph
-----Original Message-----
From: Kristen Ashley Slemp [mailto:[email protected]]
Sent: Tuesday, June 30, 2009 7:35 PM
To: Joseph Lee; [email protected]; [email protected];
[email protected]
Subject: RE: [Braillenote] External Hard Drive Again
Hello Joseph and Everyone,
IS ("milliamps") AN ABBREVIATION Or IS IT A WHOLE TERM?!?
AND WHETHER IT'S AN ABBREVIATION OR A TERM WHAT DOES IT MEAN?!?
THANK YOU!
SINCERELY, Kristen
> ----- Original Message -----
>From: "Joseph Lee" <[email protected]
>To: "'Alex Hall'" <[email protected]>,
<[email protected]>,<[email protected]
>Date sent: Wed, 24 Jun 2009 20:54:11 -0700
>Subject: RE: [Braillenote] External Hard Drive Again
>Hi Alex,
>Actually, from my research, when USB devices are first connected
to a host
>(such as BrailleNote), it will start out with 100 milliamps. When
the host
>says to switch to higher power, then it will switch to maximum
power output
>- 500 milliamps. A USB hub, regardless of number ports, is
supposed to
>provide a total of 500 milliamps. For instance, a four-port UsB
hub can use
>100 milliamps to power itself, plus 4X100 milliamps for devices
connected to
>it.
>I think in theory, USB hubs with devices attached will work with
>BrailleNote. Most come with UsB plus an aC adapter for power.
>Cheers,
>Joseph P.S. if it is not FAT, try using a drive format software
to convert
>it back to fAT32.
>-----Original Message-----
>From: [email protected]
>[mailto:[email protected]] On Behalf Of Alex
Hall
>Sent: Wednesday, June 24, 2009 8:32 PM
>To: [email protected]; [email protected]
>Subject: re: [Braillenote] External Hard Drive Again
>Not a hub, but an external drive? Sure! Mine is a 320gb Seagate
>that works perfectly. If you have a hub it should work. Both
>ports can put out 500 milliamps between them, but, as I
>understand it, one port could put out 500 and the other can be
>inactive, or one can give 200 and the other 300, and so on (I
>assume this from the wording of the manual). Therefore, the one
>working port on your machine should give you the power required,
>and all you need is the hub to give you both ports (data and
>power). Hope that makes sense!
>Have a great day,
>Alex
>> ----- Original Message -----
>>From: "Nicole B. Torcolini" <[email protected]
>>To: "'Braillenote List'" <[email protected]
>>Date sent: Wed, 24 Jun 2009 20:19:59 -0700
>>Subject: [Braillenote] External Hard Drive Again
>>Some of you may remember that I got an external hard drive for
>Christmas and
>>was trying to hook it up to my Mpower 7.5. At the time, I gave
>up because
>>the bn could not provide enough power, one of my USB's being
>broke. I now
>>have a USB hub. The drive is 160 gb and it is not fat format.
>Has any one
>>had any luck with an external hard drive and a usb hub with the
>bn?
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