In order to be able to quickly test the Braille character units, I designed a demo board, that should be also useful to showcase the project to potential users.

This board is designed as an Arduino shield, 12v powered, using 3 TB6612 ICs to drive the coils.

It has a button to select the showing modes, and the space for a 128x64 Oled that will display the letter that corresponds to the Braille letter shown by the pins.

Eagle design files are available.