Hexagon

I usually try this method when there isn't something easier: https://superuser.com/a/990986

Sorry, but that's what you get for buying NVidia eyes

I'm sorry to ruin your story, but before semiconductors we used vacuum tubes to do the same stuff.

(Well, they sucked in many ways: they were bulky, heavy, slow, fragile, and hot. But they could do logic gates and everything.)