So far I've identified 2 things:
1. It have 5 big cards, all labeled "Innotech Offical Terminator Miner PCBv4
This is probably just a rebrand of another miner since you mentioned a raspberry pi it's likely an Avalon mining gear, I am not aware of any Inno gears that don't come with their own control board, so you might be looking in the wrong direction.
Please take a photo and upload it to
https://imgur.com/ and post the link here, it will be a lot easier to identify the miner through the picture.