Quick make I did last weekend…
Late last week I met a blind guitar player who offered to help me out with an accessible medical device project. In exchange, he asked me to build him a blind accessible tuner.
You plug your guitar into one 3.5mm port and a pair of headphones in another. When you play a note, it’ll say what note it is, and if it’s off whether it is too sharp or flat.
I’m taking it down to his flat for testing later in the week. Afterwards I’m planning on releasing the code open source.