28 Sep
2004
28 Sep
'04
3:02 a.m.
Hi,
Tom Jennings <tomj(a)wps.com> said:
You're right, and while diodes would allow you to
conjure up arbitrarily
complex terms of even relay logic, it's also true that solid state
diodes didn't exist back when relay calculators were The Latest Thing,
if these questions are leading to 'why didn't they...'
Though there's always selenium rectifiers, ugh. Besides being toxic,
huge, hot, they are slow and terrible forward/reverse ratio, though
likely faster than a relay. They've been around for a long time, I
wonder how good they' be as a relay signal diode (shudder).
There were germanium point-contact diodes some of which could handle over
50mA and over 100V so would be ok with lower power relays.
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!