5 Jun
2006
5 Jun
'06
9:26 p.m.
woodelf wrote:
dave06a at dunfield.com wrote:
TTL is slow enough that WW is perfectly acceptable (assuming you
have the tools and patience). Actually, WW can be a better
fabrication technique than a PCB in many cases. PCB layout of
(really!) high speed designs is an art form that a lot of
folks don't quite appreciate. So, Joe Average LayoutGuy may
not realize the BFM that goes into high speed (short edge
times, etc.) layouts. And, you end up with a mess to try
to troubleshoot.
OTOH, wirewrap (by *machine*) is usually point to point which
tends to cut down on coupling between signals, right angles
in foil runs, etc.
IMHO, and essential tool if you are serious about
doing any kind of
rework is a good desoldering station. Takes a bit of time, but if done
it right, the chip just lifts out with no damage to it or the board. One
of the best investments to my workbench that I ever made....
projects. The SBC6120 is good reason to get a better iron for me now.
I take it was tossup between a scope and good soldering iron
for the first best investment once you get off the kitchen table for
projects. The SBC6120 is good reason to get a better iron for me now.
PS. I notice most TTL projects are wire wrapped that I have seen on the
web rather than having a PCB made.