No , you do not need a Raspberry Pi or special computer to run a Bitcoin node...

I see many people looking to run a BTC node and are asking what hardware they should be using.
If you want to run a BTC node all you need to do is download and run Bitcoin Core on your current PC.

It can be found here. https://bitcoin.org/ . Follow the instructions for your operating system. If you do not have the hard drive space for the entire blockchain you can limit it to a certain amount, for example 10gb, and run a pruned node.

Here looks to be a good video for those that are new to setting up a node or a wallet.
https://www.youtube.com/watch?v=PXg_xUIYN84