24 Sep
2004
24 Sep
'04
3:01 p.m.
On Fri, 2004-09-24 at 08:03, Paul Koning wrote:
I think when people talk about "gates" in a
logic design, it's
normalized back to the simplest kind: 2 input gates. So that's two
relays.
Well, with multi-terminal devices like relays, you get lots of outputs,
double-pole sort of "open collector". Plus, when circumstances allow it,
you can use ONE relay coil as two inputs; the two ends of the coil
winding are coil1 and coil2:
coil1 coil2
-v -v off
-v +v on
+v -v on
+v +v off
Can't do that with a transistor!