Relay computers - OR functionality

From: Dwight K. Elvey <>
Date: Mon Sep 27 18:32:52 2004

>From: "Tom Jennings" <>
>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).

 They should work. They even have a slight advantage
as diodes to absorb the flyback energy in DC relays.
The increased forward voltage drop means a quicker
release of the relay.
 Also, I though I'd mention that most AC relays have
a small copper shunt coil to help delay the release
of the relay between cycles. This keeps the relay
from chattering at 60Hz ( 50Hz for UK and Japan ).
I would guess the coil does the same thing for
a DC relay.
Received on Mon Sep 27 2004 - 18:32:52 BST

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