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Article #100Re: nasa-celebrates-successful-mars-landing
From: Jon Kirwan
Date: Mon, 13 Aug 2012 08:31
Date: Mon, 13 Aug 2012 08:31
37 lines
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3059 bytes
On Mon, 13 Aug 2012 01:18:31 -0700, I wrote: >On Sun, 12 Aug 2012 23:52:09 -0700, Jeff Liebermann ><jeffl@cruzio.com> wrote: > >>On Sat, 11 Aug 2012 23:22:35 -0700, Jon Kirwan >><jonk@infinitefactors.org> wrote: >> >>>My intent is to only use parts that a student can afford to >>>buy and OWN at home. >> >>Is $30 too much? >><http://shop.breadpig.com/collections/publiclaboratory/products/desktop-spectrometry-kit> >><http://spectralworkbench.org> > >Yes, $30 is too much and so is requiring a computer. To start >out, the students build a paper box and use a DVD and just >their eyes. The DVD is far far less than $1. (20 cents?) The >box is ONE sheet of cardstock (a few pennies.) The glue is >Elmer's and doesn't need much. That's it. The DVD is the only >tricky part. I just prefer the DVD-RW because it doesn't have >a terrible blind spot in the red band (DVD-R absorbs heavily >over a range in there.) > >Some students will then move on to the idea of a camera and >using a computer to process the pixels. There is some work >involved in that next step (I've already written all the >wavelength calibration software, though.) Not all students go >there. Most just stop at the box and use their eyes. P.S. I also see that the above $30 unit specs "better than 3nm spectral resolution." I'm already getting much better than that, being able to easily separate 577nm and 579nm mercury doublet. Easily. Jon
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From: Jon Kirwan <jonk@infinitefactors.org>
Newsgroups: sci.electronics.design,aus.electronics,comp.arch.embedded
Subject: Re: nasa-celebrates-successful-mars-landing
Date: Mon, 13 Aug 2012 01:31:17 -0700
Organization: Infinite Factors
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