Relay computers - OR functionality

From: Stan Barr <>
Date: Tue Sep 28 03:02:30 2004


Tom Jennings <> 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.

Stan Barr
The future was never like this!
Received on Tue Sep 28 2004 - 03:02:30 BST

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