David VanHorn <dvanhorn <at> microbrix.com> writes:

> Nine phototransistors and a processor, and you can have the output in
> hex, or whatever.

Please, you can buy 300,000 phototransistors in a USB webcam for $20 and the
average 1.5 GHz CPU is more than enough to work with that output in realtime
(and likely faster than any original paper tape reader ever did with some 
tweaks).


Peter P.


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