I saw the code jumper tech at a conference once, it was actually really thoughtfully done, I had no idea it cost 1k though! One other option I've seen is this

I saw the code jumper tech at a conference once, it was actually really thoughtfully done, I had no idea it cost 1k though! One other option I've seen is this Spintronics platform: https://upperstory.com/spintronics/ https://upperstory.com/spintronics/ I first saw it on Steve Mould's youtube channel, they're basically mechanical circuits and it looks super cool. https://www.youtube.com/watch?v=QrkiJZKJfpY https://www.youtube.com/watch?v=QrkiJZKJfpY