These are interesting http://www.sensorytools.com/braillecell.htm
5V parts, and I think they use a multidrop serial protocol. It would probably be easy to interface these with a microcontroller. I wonder how much they cost.
This other page says: At this time the piezoelectric cell is the basic element in most refreshable Braille display products. This technology is costly, difficult to assemble, and is limited in many ways. An alternative technology, the Mechatronic Braille Cell from Robotron, is less expensive and requires less power. The basic module consists of 4 connected Braille cells. This technology is still too expensive and requires too many costly manufacturing steps.
http://www.wyfiwyg.com/whitepaper.htm
Hmmm that domain name is wyfiwyg! What you feel is what you get?
I guess we are OT because this is a linux list. Okay if I had these cells, and attached them to microcontroller, I could interface them to linux over /dev/ttyS0
-- Doug
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