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Consider building your own. There's nothing stopping you. I've heard whispers of mini PCIe 3G cards that have "unused" pins that actually offer up a USB device
by striking 8y ago
Consider building your own. There's nothing stopping you.
I've heard whispers of mini PCIe 3G cards that have "unused" pins that actually offer up a USB device. That's how the USB-to-miniPCIe adapters work.
There are also ARM processors that can operate as USB hosts and run Linux or a BSD.
LiPo batteries are cheap and fun to use. The charging circuits are less fun, but there are probably ways to handle it without too much trouble.
And finally, our good friends at AliExpress or eBay have plenty of SPI-driven e-ink displays and probably a few usable digitizers, although you'll have to combine them yourself.
If you ever actually go through with building this, let me know. I looked into it once but lacked the time to ever finish.