23 May
2012
23 May
'12
11:49 p.m.
Okay, folks are suggesting phototransistor+light source for this kind
of thing. But I was wondering...
Does anyone know of a tape (or card) reader that uses a slight vacuum
(or positive pressure) (player piano style) to read the patterns?
Such a method wouldn't be sensitive to the material (e.g. clear
mylar) used for the medium.
Not that I'm planning to build one, but that I'm curious.
--Chuck