Enclosure for DigiPi

This is an enclosure for the DigiPi sandwich including Raspberry Pi Zero W, Waveshare UPS Hat, Fe-Pi Audio Z Sound Card, Display hat and RigHat transceiver interface hat by AC8L.

DigiPi project by KM6LYW: https://digipi.org
RigHat for DigiPi: https://github.com/AC8L/DigiPi_RigHat

There are four versions of the bottom part of the enclosure:
1. For waveshare UPS Hat, Pi Zero W, Fe-Pi sound card, Display Hat (and RigHat). All inclusive.
2. For Pi Zero W, Fe-Pi sound card, Display Hat (and RigHat) - No UPS Hat.
3. For UPS Hat, Pi Zero W, Display Hat - No Sound Card.
4. For Pi Zero and Display Hat - No UPS Hat, No Sound Card.
5. For the completeness of permutations there should be also a minimalistic version for Pi Zero only. Will do in the future :)

To fit the enclosure the DigiPi sandwich has to be assembled using 2.5mm standoff hardware. Bottom 4 nuts must be used from the original waveshare UPS Hat kit. They are few mm shorter than what is usually included in most standof