From: "Frank Bemelman"
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org>
Subject: Re: does this fit in a 22V10 gal?
Date: Tue, 24 Sep 2002 18:08:07 +0200
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Organization: EuroNet Internet
NNTP-Posting-Date: 24 Sep 2002 16:09:45 GMT
"markp" schreef in bericht
> "Frank Bemelman" wrote in message
> > "markp" schreef in bericht
> > news:aml39j$6qui0$1@ID-100912.news.dfncis.de...
> > >
> > > >
> > > > Thanks for that, Mark. Saves me a bit of work ;) I still use some
> > > > sort of old palasm to program my galchips, so the final equations
> > > > are very helpful.
> > > >
> > >
> > > You're welcome Frank. Palasm eh? That's going back a bit! I would
> > recommend
> > > getting the Lattice software though as it's free and easy to use, plus
> > > you've got all those isp devices to target! Anyway, best of luck with
> > > project.
> > I made my 22V10 today, but changed it to sub 1, so that giving adress 1
> > to the first module selects the 2nd, giving a 2 selects the 3rd and
> > so on. A bit more intuitive that way. I also changed my pcb-layout,
> > removed the 5 adress-jumpers I initially planned to use for selection.
> > I tested the 22V10, and it behaves as expected. I'll think I'm ready
> > to order my first set of prototypes now - but usually I wait a week
> > to see if some other bright idea pops up, while not thinking about it ;)
> Makes sense! Are you going to give us more of a clue as to what this kit
> does (contract confidentiality permitting..)? Just curious!
It's a machine to count an *exact* number of seeds, size ranges from 0.25mm
diameter to perhaps 10-15mm. It consists of 12-96 channels, seeds fall
them, are counted, and catched by a shutter if the count > requested amount.
Each channel counts ~20 seeds per second, so 1000 seeds can be counted in
less than one second, permitting some time for the batch to leave the
shutters to be reopened etc. Every 4 channels are controlled by one board,
each board has a little uP with adc etc, the GAL for the adressing, drivers
for the shutters etc. There are 24 boards maximum, although I could use 32
boards. We already have similar systems, but these have a tremendous amount
of cabling, something I want to make a bit more efficient. Should save time
put everything together. BTW, not all channels have shutters, depending on
configuration and desired performance.
Why counting and not weighing? The weight is too variable, and some sorts
of seeds cost more than gold (in weight). Since each individual seed is
guaranteed to 'work', the exact number of seeds is packed & sold. It's
almost like counting money.
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