A few makers sent this in… the latest HP 20b biz calc can be modded’ (they’re releasing a dev kit). I downloaded the dev kit, they’re not messing around, schematic is included. Gang, this is an Atmel ARM, an LCD with the power supply done – what the heck is going on here? Way over powered for a calc, just asking for projects – Makers please do something cool with this!
HP 20b biz calc can be modded