20 Feb
2009
20 Feb
'09
1:01 a.m.
Part of the US NAVY UYQ-21 AEGIS program used an input / output computer
device called a Computer Controlled Action Entry Panel ( CCAEP ) that had
"switches" that were really just holes that you poke your finger into to
interrupt a light beam ( IR LED ) that was shining on a phototransistor.
Couldn't use capacitive switches because the guys had to wear gloves in the
event of a chemical threat.
Best regards, Steven
> A member of another list thinks he remembers a
large computer with a
> control/maintenance panel that used optical switches to set and clear
> register bits. The operator would place a finger in a hole/depression,
> interrupting a light beam to a photosensor, toggling a flip-flop.
>
> Did such a system exist, or is this just wishful thinking?
>
>
> Mike Loewen mloewen at cpumagic.scol.pa.us