Relay computers - telephone type

From: Steve Thatcher <>
Date: Sun Sep 26 12:08:43 2004

another comment about telephone relays that I played with when I was twelve
(38 years ago) had a built in speed limitation. You could connect them up
in a buzzer fashion (power to coil through one of the contact sets) and the
relay would always make connect to the other pole of the switch and the
effect was to oscillate at around 10hz or so. You could not make them buzz
as you can normal relays. This guaranteed make capability was handy in
creating what I called a holding circuit. You could power the relay on and
use one contact set to connect power up to make the relay latch.

best regards, Steve Thatcher
Received on Sun Sep 26 2004 - 12:08:43 BST

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:37:31 BST