Another fascinating use of the Arduino development platform has been demonstrated by Joe Birch, who has created a device to display information in Braille. Joe's motivation was:
... I had idea early in the month for a refreshable braille display that could be used in public places (shops etc), so that people with sight loss could also be aware of constantly changing variables in their surroundings – such as latest offers, news updates and other piece of information that is constantly changing. Braille could be printed and changed over when this news changes, but why do that when an automated system can be put in place!
And this has been executed very well using six small solenoids as shown in the following video:
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