They once made these but I haven't seen any surplus in
years.
Until I picked up some paper tape readers on eBay
(cheap - no one wants readers, they want punches) - I
was considering making one out of tiny
phototransistors/IR emitters using wooden strips
masked with Mylar tape punched with the RUBOUT
character. I definitely think this is doable. But
seriously, I'd look at eBay, because readers with
nonstandard interface go for cheap. I recently missed
a complete Remex reader (with reels, etc) for $20
(nobody bid on it), and I DO know how to interface
these.
--- "Dwight K. Elvey" <dwightk.elvey_at_amd.com> wrote:
> Hi Glen
> There isn't much application for things with this
> spacing.
> Remember, you will most likely be connecting this to
> a
> uP. You really don't need to space then in a
> straight
> line. You can stager them and reassemble the entire
> byte width afterwards.
> Another though would be to use one of the linear
> arrays,
> used in scanners. Most of these are about as wide as
> a paper tape. You could use a collimated source and
> drag the tape directly over the array. You'd need
> to do a little image processing but it shouldn't be
> too
> difficult.
> There are some mechanical options that might work
> as well.
> Like I said, use some imagination.
> Dwight
>
>
> >From: "Glen Slick" <glenslick_at_hotmail.com>
> >
> >I was hoping there might be some sort of
> preassembled optical sensor array
> >available with the right spacing for paper tape
> holes, but maybe that is
> >hoping for too much. If you build one with
> discrete sensors, is it easy to
> >find ones that are narrow enough to stack side to
> side with the correct
> >spacing?
> >
> >
> >>Hi
> >> Ahh, such concepts as make one come to mind.
> You could
> >>scrap a number of mice for the optical sensors (
> two for
> >>each axis, 4 total per mouse ) or you could buy
> photo
> >>transistors from Jameco. In a pinch, the clear
> lensed
> >>LED's make reasonable detectors.
> >> Use a little imagination.
> >>Dwight
> >
> >
>
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> >
>
>
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Received on Tue Nov 26 2002 - 16:11:00 GMT