[metalliqaz]

Shameless plug for my own custom keyboard firmware project: https://github.com/dhowland/EasyAVR

Works with the Teensy

[justwalt]

Thanks for linking this, I’m actually in the design phase of this project right now so the timing couldn’t be better. I’m going to try it some time this week.

[kimdotcom]

So, I used to have a full-size keyboard with a built-in calculator as part of the numpad (had an LCD display above).

I would love to built an updated version.