Karnaugh For Blind people

thingiverse

We faced the challenge of teaching digital electronics to a blind student, so we created a tactile 4x4 Karnaugh map in a FreeCAD file for printing on a BQ Witbox 3D printer. This map is a simple grid with holes and cylinders, where each cylinder represents a '1' or 'X' input bit in the Karnaugh map. Each square in the grid has a hole to insert a cylinder, if there's a '1' or an 'X' in that box. The column and row headings are printed in Braille code. Our finished product is a base and 32 cylinders, with 16 of each type, fitting neatly into a small plastic bag measuring 15x15 cm. Honorio Martín González, Armando Muñoz Vergara, Ricardo Vergaz Benito, Departamento de Tecnología Electrónica, Universidad Carlos III de Madrid