Sneak peak at a project i've been working on. This contraption can recognise a binary signal from a single line of redstone (the redstone pulses). Then translate it into the letters, capitals/lowercase that it is matched with. I use actual binary to ASCII so anyone can look up the code to use it. Speed is around 3 bits per second
Also a look at my 50 character word processor display. Getting close to completion, just need to add the 2D signal shifter.