mightaswell

Bimetallic strip makes chepaer Braille Disply

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Braille Display Utilizing bimetallics as the medium to create the Braille characters instead of piezoelectrics greatly reduces the cost of the Braille display. An electric current is sent through a 30 gage wire (spot welded to the bimetallic strip) which causes the bimetal to bend, raising a plastic rod 0.5mm, the height a Braille dot. When the current is turned off, the bimetal quickly cools and the rod will fall back into its hole, allowing a different character to be created.

posted by Amogh @ 1:13 AM