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Tinue · (This post was last modified: 10-03-2016 12:13 PM by Tinue.)

(10-03-2016 07:08 AM)StephenG1CMZ Wrote: Or how about the raspberry Pi? Less than 35 for the processor board, with free Mathematica. Just need to add a battery pack and screen (but no HP Prime emulation yet).

The 5$ Raspberry Pi Zero would be enough. However: All of these single board computers run Linux. Who wants a calculator that first needs to boot up? After use, you have to shut down again properly, otherwise it will no longer boot up. For my taste, even the HP Prime is on the high end of boot-up time. A calculator has to switch on instantly, I think.

IMO, for DIY calculators, you therefore need a microprocessor, not a single board computer.