/diy/ - Do It Yourself

>>1263640
>i'm not exactly sure how multiplexing works

you're right about that. first thing is you need to determine whether it's necessary. keyboards are always wired in a matrix. so, for 91 keys with 8 duplicates, you'd need a 9x10 matrix which requires 19 I/O pins on the thing that's reading the keyboard.

if you've got 19 pins free, then no multiplexor is needed. otherwise, things jump up one level of complication.