Strange Inventions built a Raspberry Pi instant camera where the film is a removable, reusable color e-paper display cartridge. The cartridge slots in like a console game cartridge via headers, the camera writes the image to it, and the e-paper's bistable nature holds the picture indefinitely without power.
The key mechanical detail worth understanding is the header-based connection system, which makes the cartridge hot-swappable and field-replaceable. Unlike Polaroid or Instax consumables, these displays are reusable. The tradeoff: e-paper displays at this quality are not cheap, and the design files require payment to download.
Read the original for the build specifics and video breakdown, because the cartridge interface design is the part most likely to get forked by the community. The concept is modular enough that someone will improve it, and knowing how the original solved the connector problem is where that work starts.
[READ ORIGINAL →]