Saturday, 7 January 2017

New year - New PCB

Well it was bound to happen some time; the dataflash chip that I use (Adesto AT45DB011D-SSH) has now gone obsolete. This isn't the end of the, or so I thought...




My solution was simply to fit it with the 4 Mbit version, but unfortunately the console reads the chip ID as part of its "security" checks, and if it does not receive the ID for a 1 Mbit chip it ceases communications.

I have been able to source the chip in an alternative UDFN-8 package, so a little work was required to tweak the PCB to accept the new part. This also means that I now have to program the security register with the chip fitted, again no big deal.

The new PCB
Vs the old PCB
This does mean that in the long term I will have to get my head around a way forward. I could simply buy as many chips as I need for the next year, or I could come up with a smarter alternative. Who knows what this year will bring...
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4 comments:

  1. Yahoo28 February 2017 at 02:21

    Hi, do you still sell the temp humidity sensor module? I am asking because I can find the page if I search for it but it is not listed in your current blog archives and there are no links to it on your blog, I am wondering if I am looking at an old cached file. thx steve

    ReplyDelete
    Replies
    1. Belfryboy8 February 2017 at 19:37

      Yes I do, please use the contact form on this page and I will send you the details.

      Delete
  2. Praveen29 November 2017 at 11:17

    Hi, have you shipped this to India ever? Any idea about the customs etc? I am interesting in ordering it. I have a Davis Vantage Vue. Planning to connect it to WU through raspberry pi with Weewx.

    ReplyDelete
    Replies
    1. Belfryboy29 November 2017 at 11:29

      Praveen, I have shipped to India, please use the contact form at the top of this page for anymore details.

      Delete

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