You might start with https://trmm.net/Symbolics/ https://trmm.net/Symbolics/ which seems to be pretty much ready-to-go with an Arduino. If you're in the Bay Ar

You might start with https://trmm.net/Symbolics/ https://trmm.net/Symbolics/ which seems to be pretty much ready-to-go with an Arduino. If you're in the Bay Area, I would build the adapter for you just to have the opportunity to check out a Symbolics keyboard first-hand :)