[Build] [Noisebridge-discuss] Wall idea for classroom
jof at thejof.com
Tue Nov 29 00:00:41 PST 2011
On Mon, Nov 28, 2011 at 11:55 PM, Ben Mushol <ben at sixgirls.org> wrote:
> No actually it is a pen like device with a small wheel attached to it by its rim. The wheel is a serrated star and you can use it to trace large objects from blown up copies and then spray powdered chalk through a nosed bottle at it. I'm not sure how it works.
Hrm... interesting. So it's to perforate a filter/blocking material of
some kind so as to spray chalk through it to mark a path?
Your description reminds me of a Wartenberg wheel quite a bit.
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