3 Jan
2006
3 Jan
'06
8:03 p.m.
Relay logic can depend on more than simple make/break on
coil-current-present types.
Stepping relays were used in telephone and logic systems. I used to have a
telephone relay with two windings on the same electromagnet. I'm not sure,
but I suspect the two might have been used as sort of a logical "AND"
function. Latching relays use multiple coils also.
Cheers,
Chuck