Hi folks , I'm a retired Air Force technician ( Avionics ) . When I left technical school back in 1979 microprocessors were black things with many legs

.
For my job I fixed mostly high and low voltage power supplies , till 2003 when I switched the F-16 for the C-130 Hercules .
After one year of software the job disappeared ( no more source code

) so back to hardware ...
Now I'm learning step by step Linux and of course the Magnificent Orange Pi zero
I started with this excellent tutorial :
LucSmalls guide
It works perfect !
See you !