14 Dec
2008
14 Dec
'08
6:45 p.m.
On 12 Dec 2008 at 21:45, Allison wrote:
DEC had boards like that for going from TTL to RS232
as modules and
for current loop (TTY) to RS232 or the other way around. There were
a lot of "things" that often had oddball interfaces like Ham radio
tranceivers that could be driven by computer but only had serial TTL.
The one in question was hand-wired on pad-per-hole perfboard. I
submit that its purpose may never be known.
I'd have to rattle my brains quite a bit to even get an inkling for
the application of some of the bits of perfboard with stuff on them
in my hellbox that I built years ago. I ran across tiny one the
other day with two 7475s (not LS) with a header on it. I don't have
a clue about the application, but it probably goes back pretty far.
Cheers,
Chuck