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Forum Index : Microcontroller and PC projects : Error accessing SD card

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brucepython

Regular Member

Joined: 19/06/2011
Location: Australia
Posts: 64
Posted: 09:16pm 29 Jun 2011
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Sandisk Ultra II, 2 Gb, SD works fine.
I also have a mystery one called "LX series" 16 Gb, SDHC, Class 10. It's fine too, though it could be a while before the Maxi collects that much data.
 
donmck

Guru

Joined: 09/06/2011
Location: Australia
Posts: 1313
Posted: 09:43pm 29 Jun 2011
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  brucepython said   Sandisk Ultra II, 2 Gb, SD works fine.
I also have a mystery one called "LX series" 16 Gb, SDHC, Class 10. It's fine too, though it could be a while before the Maxi collects that much data.


Thanks Bruce, have also added:
http://www.themaximitecomputer.com/maximite-control/

Cheers Don...
https://www.dontronics.com
 
VK6MRG

Guru

Joined: 08/06/2011
Location: Australia
Posts: 347
Posted: 03:00am 30 Jun 2011
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Maybe the problem with the SD cards is not the cards themselves but an issue with the Maximite. When I built the WIB, i had the same problems that some of you guys are having with the Maximite. It came down to the 3.3v regulator output voltage being slightly low. I changed the resister bias and to give me a voltage as close to 3.3v as possible. Some SD cards have a very fine voltage tolerance (window).
I just thought I'd share this experience with you in case it may help.
Its easier to ask forgiveness than to seek permission!

............VK6MRG.............VK3MGR............
 
donmck

Guru

Joined: 09/06/2011
Location: Australia
Posts: 1313
Posted: 04:10am 30 Jun 2011
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  VK6MRG said   Maybe the problem with the SD cards is not the cards themselves but an issue with the Maximite. When I built the WIB, i had the same problems that some of you guys are having with the Maximite. It came down to the 3.3v regulator output voltage being slightly low. I changed the resister bias and to give me a voltage as close to 3.3v as possible. Some SD cards have a very fine voltage tolerance (window).
I just thought I'd share this experience with you in case it may help.


Good Lead, have added.

http://www.themaximitecomputer.com/maximite-control/

Cheers Don...
https://www.dontronics.com
 
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