This information encoding system is called binary. It's the form of encoding that allows computers to run. Binary uses two states (represented by the digits 0 and 1) to encode information. This ...

The key of the build is the encoder wheel and pegs, which act as the “converter” between decimal and binary and actually performs the switching.

In this Design Idea , an old technique of diode-based 16-to-4 encoding is combined with a new design, to scan a record number of buttons – 74 – with only four I/O pins! The diode encoder: Background ...