Optical paper tape readers

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From: Andy Holt <andyh_at_andyh-rayleigh.freeserve.co.uk>
Date: Wed Nov 27 01:35:07 2002

Another problem with building a paper tape reader is to ensure that the
light source is constant - in particular that it does not vary with mains
frequency!
(Memories of getting a PTR modified to work on my homebrew 6800 system 25
years ago)

Andy
Received on Wed Nov 27 2002 - 01:35:07 GMT

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