On 24 May 2010 at 21:07, Tony Duell wrote:
My original commnet (using a carbon microphone) was
intended to imply
coupling that microphone to the stylus of the cylinder player and
using the change in resistance of the carbon granule assembly to
transfer data into the computer...
Nonsense! The laser head assembly from a DVD player will do the job
with much less wear of the medium. :)
(There was a design note recently in one of the EE mags (EDN or
Electronic Design) about measuring small distances using exactly
that.)
--Chuck