To assemble a Raspberry Pi cluster, you will need the following supplies:

Raspberry Pi boards - The number of boards depends on the size of the cluster you want to create.

MicroSD cards - One for each Raspberry Pi board to boot the operating system.

Ethernet cables - To connect the Raspberry Pi boards to a network switch.

Network switch - A network switch will connect all the Raspberry Pi boards together in a network.

Power supply - You will need a power supply that can power all the Raspberry Pi boards in the cluster.

Cooling fans - If you plan to run your cluster for extended periods, cooling fans may be required to prevent overheating.

Case or rack - You may want to place the Raspberry Pi boards in a case or rack to protect them and make them easier to manage.

Operating system - You will need an operating system that supports clustering, such as Raspbian, Ubuntu, or CentOS.

Cluster management software - To manage the cluster, you will need cluster management software such as Kubernetes, Docker Swarm, or Apache Mesos.

With these supplies, you should be able to assemble a Raspberry Pi cluster that can be used for a variety of purposes, including data processing, web hosting, and machine learning.
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