Home
JAQForum Ver 24.01
Log In or Join  
Active Topics
Local Time 10:19 25 Nov 2024 Privacy Policy
Jump to

Notice. New forum software under development. It's going to miss a few functions and look a bit ugly for a while, but I'm working on it full time now as the old forum was too unstable. Couple days, all good. If you notice any issues, please contact me.

Forum Index : Microcontroller and PC projects : maximite Sd card problems

Author Message
jeffj
Regular Member

Joined: 04/02/2012
Location: Australia
Posts: 84
Posted: 04:08am 07 Feb 2012
Copy link to clipboard 
Print this post

Hi folks This my first post so hope someone can help
I have been using a maximite for a few months and somehow I have damaged the chip.
everything was working ok.
I obtained a new chip from Silicon Chip and installed it together with an upgrade of the software .All ok except that I cannot access the SD card . I understand that the Sd card is on the b drive and have changed directories to suit but to no avail.
I have checked and rechecked all the connections including the card in and lock.
I have difficulty beleiving that it is a chip fault bu I suppose it is possible.
Any help would be gratefuly received
 
VK6MRG

Guru

Joined: 08/06/2011
Location: Australia
Posts: 347
Posted: 11:33am 07 Feb 2012
Copy link to clipboard 
Print this post

You could start by checking the 3.3 volt rail. Some SD cards have a very narrow voltage window (+/- 0.2v).
Also have a look through the posts from last year as there was a lot of discussion on this subject in the beginning.

Matthew
Its easier to ask forgiveness than to seek permission!

............VK6MRG.............VK3MGR............
 
jeffj
Regular Member

Joined: 04/02/2012
Location: Australia
Posts: 84
Posted: 04:37am 10 Feb 2012
Copy link to clipboard 
Print this post

Thanks Mathew. The volts were 2.68 so were within the limits. I did another continuity check and found one of the pins not soldered properly I fixed that and now working ok Thanks again Jeff j
 
VK6MRG

Guru

Joined: 08/06/2011
Location: Australia
Posts: 347
Posted: 07:58am 10 Feb 2012
Copy link to clipboard 
Print this post

Hi Jeff,
You need to look at your 3.3 volt side of things as 2.68 volts is very low.

Its easier to ask forgiveness than to seek permission!

............VK6MRG.............VK3MGR............
 
Print this page


To reply to this topic, you need to log in.

© JAQ Software 2024