Sometimes I look at the ordinary things and just see Raspberry Pi inside. Of course, in real life, there is no Pi inside, so I need to build it in there myself. Recently I found a minimalist wallet (or badge) and transformed it into an eInk CyberBadge!
[IMG:With eInk display (285kB)] [IMG:Original wallet/badge (279kB)]
To me, the wallet looked like a perfect sci-fi themed frame for an eInk display. Resulting in some kind of smart badge.
In this case, even Pi-zero is too much, so I was looking for ESP32 based bord. Badgy could be the option, but unfortunately, it is out of stock for a long time. Good thing I've discovered LILYGO® TTGO T5 series. V2.3 fits just right! Even some space left for the battery.
Original wallets back panel are unscrewable by a 1.5mm t5 screwdriver and enclose LILYGO® TTGO T5 V2.3 and 290mh battery perfectly. For a front panel, I've cut a screen-shaped hole in a credit card (wallet originally intended to hold credit cards), then glued it with a carbon film to look nicer. See:
[IMG:Front (116kB)] [IMG:Back (back panel unscrewed) (166kB)]
Also, the wallet has openings on both sides, allowing access the on/off switch (with a screwdriver) and USB port (if you have a really flat cable).
[IMG:Left (119kB)] [IMG:Right (136kB)]
Note that the screen is monochrome, not grayscale (no greyish mid-tones like you might have seen on Kindle). It has only 2 colors, so I need to get pixel-perfect black-and-white images. To get a nice looking monochrome photo I went on pipeline: remove.bg→Ajust levels in Krita→ditherpunk→Img2Code.
[IMG:Wear (491kB)] [IMG:Original (279kB)]
As a bonus let me share some pixel perfect-images, if you want some design:
Q: Why do you need that?
A: I don't know. My conference speaking days are over, and will there be any conferences at all? It was just a cool thing to build, that's all.
A: You know, sci-fi movies promised us cool devices like Multi-Pass. But all we've got are boring glass rectangles with no character. So I need to have some cool stuff from that alternate timeline :)
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