The main idea behind this design was to create a cluster case for Raspberry Pi, minimizing overall downtime if one fails; the ability to swap one out as needed, without having to take down the entire cluster. Each Raspberry Pi has its own tray, USB power cable, and ethernet cable, independent of the other Raspberry Pi in the cluster.

The 120mm fan airflow is funneled directly through the Raspberry Pi, with heatsinks oriented to allow airflow between the fins. Additionally, the 120mm fan does not produce enough airflow on 5v power (provided by Raspberry Pi or USB adapter); usually runs at 12v from PC connection. I split the USB adapter cable, and placed a buck converter to amplify 5v to 12v, providing the necessary power for the full RPM of the fan.

The USB power hub is mounted underneath the base, with USB-C at the rear. Depending on which power hub you use, this may or may not be ideal placement, or of use.

The top houses the TRENDnet 8-port unmanaged switch, which can fit snugly with the rubber pads attached. The spacing was made for that switch, which may or may not be suitable for other similar switches.

Build instructions can be found on my Instructables page: [https://www.instructables.com/id/Raspberry-Pi-Cluster-Case/](https://www.instructables.com/id/Raspberry-Pi-Cluster-Case/)