Rehmi Post wrote: > Charles J Knight wrote: > > 2 things -- why would you need an array for a nipkow device, since they > > are supposed to use a single modulated source per display? Unless > > you intend to build an array of linked displays, like Rehmi did. (4 > > displays "on top" of each other, all on the same disk) > > I guess this point wasn't clear. Each LED is driven by a separate pixel > stream to create a unique set of scanlines. The little MPEG clip on my page > shows the Nipkow disk built for 4 separate LEDs but actually driven by only > one. In a single revolution of the disk, 4 groups of 32 scanlines are swept > out. Each group is just tall enough to be driven by a few SMT LEDs > side-by-side in a 1206 package. > > If you're willing to spend a few bucks, you could just modify my Postscript > code [1] to fill in the disk area with black and then have it rendered to > film at a print shop for a sufficiently opaque mask. > > -Rehmi > > [1] - linked from http://www.media.mit.edu/~rehmi/rotoscope/ It's all "Designers' Option", I wanted a slower rotational speed due to precession being a concern, though you could use a counter-rotating motor to fix that, at a cost of power usage. Rehmi, any problems with precession during movement of the users' head? Wind-up, hmmm <G> Mark -- I re-ship for small US & overseas businesses, world-wide. (For private individuals at cost; ask.) -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" toWear-Hard Mailing List Archive (searchable): http://wearables.blu.org
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