Bar graphs and other charts provide a simple way ... within the program to help educators and designers automatically create accessible tactile charts. The tool could make it easier for blind ...

and a Nano in a nifty 3D printed box up top to do some math and display the number of cans remaining as a simple bar graph. The sensor reads one bay, and the code multiplies by two to get the total.

Far from it, in fact — the smoothly animated bar graph displays alphanumerics look fantastic. What’s cool about this is that he accomplished all this without resorting to custom characters.