[SunRescue] RE: chg subj. 4004's and nc mills

[Ken Hansen]

Paper tape readers are *simple* to make, assuming you have a steady arm...

All you need are 8-10 light sensors, patch them through a preprogrammed
EPROM as the address, and the 8 bit ASCII character set falls out the other
side as the data from the EEPROM.

There is a sprocket/alignment hole that runs down the middle of the tape, a
hole there would provide a "strobe line" to indicate a new character is
available.

As you pull the paper tape through, it will pass over the light sensors,
indicating the character punched on the tape - a steady hand would be
required.

HTH,

Ken
(Who would love to get an old teletype model 33 w/keyboard & paper
punch/read. Unix on a paper terminal would be a real experience! It would
give me a chance to learn the "ed" editor!)

(This is based on recollections from late 70's BYTE articles, as well as Don
Lancaster's TVT Cookbook (TVT = TeleVision Terminal, a terminal that output
composite video and used a small number of parts, less than 10 ICs IIRC) -
not actual experience.)
----- Original Message -----
From: "William Janssen" <billj at calweb.com>
To: <rescue at sunhelp.org>
Sent: Saturday, November 11, 2000 12:40 PM
Subject: Re: [SunRescue] RE: chg subj. 4004's and nc mills


>
>
> dave at cca.org wrote:
> >
> >
> > You don't have any spare paper tape readers / writers left over,
> > do you? :-)
> >
> >
> I still have a paper tape reader somewhere in my shop/junk room.
>
> Bill K7NOM
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