Subject:
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Re: Micro Scout programming with VLL bar code: HOWTO
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Newsgroups:
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lugnet.robotics.microscout
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Date:
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Tue, 11 Jan 2000 22:43:25 GMT
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Viewed:
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6481 times
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In lugnet.robotics, Matthew Miller writes:
> Richard Earley <richard.earley@worldnet.att.net> wrote:
> > But that requires timing on the part of the computer. A simple display of a
> > bar code could also be posted to a web page for access by all....
>
> Couldn't you use an animated gif?
I just tried this by modifying the PS barcode maker Doug Eaton posted. I made
one 'bar' and one 'space' as a 256x256 GIF and merged them with gifmerge as
directed by Doug's PS (plus all space lead-in/lead-out). I played this back at
various speeds with xanim, and none of them triggered my microscout (with the
brightness at 100% and the microscout against the screen). With my monitor's
60Hz refresh I have to slow it down a bit to make sure the animation speed
dominates rather than the monitor refresh rate.
VLL from the scout is transmitted much faster than a monitor could (without a
dedicated driver of some sort). It also only works if the bright red LED is at
point-blank range to the microscout's input (my LEGO fiber optics haven't
arrived yet, curses).
If someone could make this work it would be trivial to put up a CGI script that
let people enter scripts and get back a GIF which would program their
microscout. I don't think monitor brightness is going to be sufficient,
though.
--Ben
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