The PolaPi camera flew to new adventures quite a long ago. I hope it still works and the new owner is using it time to time. I missed it a bit so it is time to rebuild one. In the meantime other parts got out on the market. Such as a smaller thermal printer and the smaller Raspberry pi Zero.
Here we have a good opportunity to try to slightly simplify the project and add features missing on the previous one.
By simplifying I mean avoid the thermal printer hack of the previous PolaPi, and use Python instead of Java. And by features I mean the possibility of review and re-print pictures. More details can be or will be on this Hackaday.io page.
Is all about monochrome.
The Adafruit nano printer is only capable of printing black dots. So it is for the Sharp Memory LCD. Except the printer’s resolution is slightly higher than the screen, I like the coherence between what you see and what you get.
Vít Hašek made it’s own PolaPi and push the concept for his thesis. He called it the white box, in opposition of today’s black box devices.
It is mainly the reason why I made the new one white as well.
Under the hood.
The electronic hardware is similar of the previous one, except the screen.
However I used 3D printed part for the case.
A button is for taking picture and change to ‘live view’ mode. Another to print the picture file or change to ‘review’ mode. Two others to navigate through the image files. And finally a last one to initiate the raspberry pi shutdown