[WikiReader] 32GB microSD card works
dj6mf at frombob.to
Wed Aug 1 22:04:42 CEST 2012
I am testing a 32GB card in my WikiReader.
This is a Class 4 card by SanDisk. The model number is SDSDQ-032G-AFFP.
I paid less than US$20 for it.
It passed the calc.elf test, so I installed all of the English-language
wikis listed on the update page at
http://dev.thewikireader.com/language-packs/ (all eight of them). (BTW:
Thanks to whomever just updated that page. Much easier to find things
now. [But the German-language version of Project Gutenberg is still not
I've been using this card for a day or so now, and everything is working
fine. Currently reading a book by Garrett Putman Serviss (an amazingly
prophetic writer, easily the equal of Jules Verne and H. G. Wells.) I
discovered him by hitting the Random button repeatedly.
Those eight collections occupy about 1/3 of this card. Plenty of space
left for future expansion.
I have also recently tested a 16GB card. This one is a Class 4 card
from Kingston, model SDC4/16GB (about $10). No problems with this card.
I have read somewhere the hypothesis that large-capacity SD cards
sometimes misbehave because they can draw too much current from the
power bus in these small devices. Therefore I do all my WikiReader
testing with 1.2V rechargeable NiMH batteries instead of the standard
1.5V alkalines. While testing the 16GB card, I ran my batteries down
(this took a long time!) until the total battery voltage was less than
2.1V; only then did the WikiReader start to malfunction. Thank you,
Openmoko, for this marvelous little piece of engineering.
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