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You could honestly just start with this design, remove a few things, add an eInk display, use some other form of storage than SD cards for the Pi (since SD card
by Karrot_Kream 4y ago
You could honestly just start with this design, remove a few things, add an eInk display, use some other form of storage than SD cards for the Pi (since SD cards are notoriously indurable), and have exactly what you want. You'd probably need some custom display writing code and have to write some custom X/Wayland app that draws to the eInk screen. The idle power draw of the Pi is tiny and as long as you avoid writing to the screen with any frequency, it can probably stay alive for decades. (Though whether a Pi can last that long is a good question.)
- formerly_proven 4y ago> The idle power draw of the Pi is tiny This is... uh... news to me?
- Goz3rr 4y agoI'm curious where OP got that idea from too. Compared to full blown PCs sure the idle power draw is tiny, but it will still drain an average powerbank in a few days at most. You could fully shut down the Pi (which would require some external hardware or user input to wake it up again) but even then compared to usual low power electronics drawing microamps in deep sleep, the milliamps the Pi slurps up is a lot. It would probably last a few weeks, maybe months in this state, but it would also take 30+ seconds to boot every time you need to do anything.