I've read 20 different lists that have common suggestions for disused phones like use it as a dedicated e-reader, a security camera, a dedicated android gaming device, a photo frame, etc. These are fine ideas but what is a project you made or are aware of that's "off the beaten path"?
Ask HN: Niche Uses for Disused Phone
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Re: Ask HN: Niche Uses for Disused Phone
#2makes a great brain for a small robot - i use usb-otg and a hand-rolled c io library, but ive seen lots of easy access projects like allowing an android to link with lego mindstorms (technic robotics kit) via a daughterboard of sorts