Optical paper tape readers

From: Kapteyn, Rob <kapteynr_at_cboe.com>
Date: Wed Nov 27 11:10:01 2002

I have a optical paper tape reader called a "TPR-1" connected to my Altair.
We bought it as a kit.
It has a pretty blue box that matches the computer.
It uses a standardized part that has phototransistors spaced correctly to
read paper tape.
The sprocket hole also has a phototransistor that is used as the clock.

This is how we always loaded Altair Basic.

I saw the manual a few days ago.
I'll see if I can scan it.

-Rob

-----Original Message-----
From: cctalk-admin_at_classiccmp.org [mailto:cctalk-admin_at_classiccmp.org]On
Behalf Of Andy Holt
Sent: Wednesday, November 27, 2002 1:34 AM
To: cctalk_at_classiccmp.org
Subject: RE: Optical paper tape readers


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 - 11:10:01 GMT

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