Tag Archives: camera

PolaPi-Zero

8659491486300188651 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_mg_5911 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.shematics01

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

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The Python code and the way to get the LCD library compiled is still a bit messy at the time of writing, but I’ve put everything on github. Moreover, you can get the SDcard image on this dropbox.

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Instant-Printing-Point-and-Shoot camera

polapi01Here another project finally finished ! The Bluetooth thermal printer was fun. Unfortunately I didn’t get it work with apple i-stuff. A stand alone camera, as the Polaroid is in fact even more fun !
I used brass angle rods, glass fiber plates and screws for the case. A raspberry pi 2, this time with its own camera module. A TFT screen, the thermal printer, and a lipo battery. More details here:

hackaday.io/project/7176-polapi

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During a party, the 3.6Ah lipo was able to keep running the raspberry pi for around 6h, plus around 100 prints !
I found a large aperture CCTV lens to get maximum sensibility. The counter part is it need to be manually focused.

It is worth to mention few facts about the paper. Thermal paper is very cheap and could be easily found without BPA, but it is sensible to sunlight and heat. Exposed to sun, the prints will fade with time.

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