3D Printed Braille Display

Prototype for the UCMerced Capstone team: Team B.R.A.V.E.
(Braille Reader for Assisting the Visually impairEd) in partnership with:
COVE (the Center Of Vision Enhancement) in Merced and
Solidoodle
Due to the high cost of current refreshable Braille displays, less than 10% of blind children have the opportunity to learn Braille. To help with this, we have designed an open-source, 3D printed, refreshable Braille display which can be made for less than $200.
Based on the premise of sliding bars with bumps to raise the dots, the bars are moved by small pager motors with worm gears (such as http://www.robotshop.com/solarbotics-tiny-pager-motor-tpm2.html). An Arduino will control the motors and receive feedback from a small resistive element in the center which will serve as a position sensor.
The current design as posted is fully printable, but only functional manually.
Modifications which still need to be made:
-resistance sensor and contact pocket need to be added.