Anycubic I3 Mega Raspberry Pi holder

# Anycubic I3 Mega Raspberry Pi holder

----
A holder to mount a Raspberry Pi inside the Anycubic I3 Mega. It uses the same mounting as the original design by petrzmax.

**Update**
Added a variant to also mount 2 relays, which can be controlled by the Pi to switch the 12V line going to the printer mainboard.

----
There are three versions available:

* Pi\_holder
* Pi\_holder\_buckconverter
* Pi_holder\_buck\_relay

The second one can be used to mount a small 5V 3A buck converter with a zip tie to power the raspberry pi.