This a device I am working on called the BecDot which is a literacy teaching tool I invented for our daughter Rebecca that could be used to teach visually impaired children Braille concepts..  (Demo video and how it works below).
The BecDot is an educational tool/toy that will be used to introduce braille at an early
age to children that are visually impaired or who have been diagnosed with conditions that will eventually render them blind.  The device incorporates 4 braille cells that react to objects with pre-programmed NFC tags attached to them.  It currently uses an Arduino Uno to drive the individual dots.
The biggest challenge with the design was to create a device that was very low cost.  I studied some of the Braille readers on the market and found that these devices are very complex and as a result make them very expensive for the consumer.  This is why not many …