John Larkin wrote:
On Mon, 22 Oct 2007 07:54:43 -0700, Joerg
wrote:

John Larkin wrote:
On Sun, 21 Oct 2007 23:36:12 -0400, "Tom Del Rosso"
wrote:

"John Larkin" wrote in
message news This its the first article of a new waveform generator. It took me a
while, an hour or two, to find a stuck bit on the uP data bus; turned
out it was a bad solder joint on one of those tiny quad resistor
packages. Something about their geometry makes them hard to solder and
hard to inspect.

Seems as though the most reliable thing we solder is BGAs. Who woulda
thunk it?
That may be the first DIP socket I've seen on one of your boards.
That's for the eprom. It holds the uP code and the fpga configuration.
I like using plugin eproms, because if we change anything, we can send
the customer a new chip and he can just plug it in. If we use flash,
field upgrading is a lot trickier and riskier.

Yep, keep it simple. Lawrence just shared a hilarious link in an older
s.e.d. thread and the story is much closer to today's EE life than I
wish it was:

http://www.thalia.org/humdec97.html

I almost spilled my morning coffee ...


As soon as anybody doing an embedded system says "let's use Java",
fire them.

John


Agreed ;-)

Same goes for .NET.

--
Regards, Joerg

http://www.analogconsultants.com/