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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