I can truly appreciate that success. Nicely done!
I felt great when I soldered this one by hand (with thermal pad underneath):
https://www.facebook.com/photo.php?fbid=10102012089099123&set=a.10102876895465233.1073741829.1209382&type=3&theater
and this one (more thermal pads):
https://www.facebook.com/photo.php?fbid=10104677974423563&set=a.634015450803.2331056.1209382&type=3&theater
Not as hard as BGA, so I can only imagine what that's like.
> On May 23, 2017, at 15:58 , Don Miller <[email protected]> wrote:
>
>
> OK, so I purchased three BBB cards quite some time ago and I just got back
> to them since I had some project ideas. So, apparently 2G eMMC chips went
> EOL and the new cards have 4G. No big deal, except for any newer image
> available wants the additional space! I built some of my own console images
> for a while, but then I saw some Sandisk 16 GB eMMC chips on Ebay and scored
> them for about a buck a piece...
>
> I've done some SMT work at home, but NEVER a 20 mil pitch BGA. I do have a
> cheap chinese hot-air station and a dedicated toaster oven for my hardware
> play though. I use a coffee mug warmer for bottom heat.
>
> Well, it took me several trials and two of the eMMC chips to dial the process
> in, but I succeeded! The only real casualty is that I discovered that the 5V
> input jack will not tolerate re-flow temperatures. I had to replace that
> part.
>
> I am just amazed I was able to hand-place that chip.
>
> If you are yawning now --- well, OK -- I am excited about this and had to
> tell SOMEBODY!
>
> Later,
> Don
>
> debian@beaglebone:~$ lsblk
> NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
> mmcblk1boot0 179:8 0 4M 1 disk
> mmcblk1boot1 179:16 0 4M 1 disk
> mmcblk1 179:0 0 14.7G 0 disk
> └─mmcblk1p1 179:1 0 14.7G 0 part /
> debian@beaglebone:~$
>
>
>
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[email protected]
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