13 Jan
2011
13 Jan
'11
2:57 p.m.
On 1/13/11 3:57 PM, Tony Duell wrote:
Ah, yes. :-) I'm still fascinated by that setup after all these
years...My first exposures to serial<->parallel conversion were the
AY-5-1013 and the wonderful Z80 SIO.
Yes. But I suppose it's possible. Long wires might provide enough
inductance.
-Dave
--
Dave McGuire
Port Charlotte, FL
Mine has
an induction motor. There are contacts in the "hardware
UART", of course, but is there enough current flowing through that
You mean the 'mechanical UAT' :-). There are no contacts in the receiver
section. circuit to
result in anything more than the most insignificant of
arcing? If memory serves that's right in the 20mA loop.
It is. The transmitter loop consists of the distributor disk, nad hte
keyboard or reader contacts. No electronics.
Of course the 20mA loop could be driven by a fialry high voltage, and
could hkave an indcutive load (e.g. a telegraph relay), which could cause
some sparking But that seems unlikely in a computer applciation.