Non-Cartesian Planar Input Device

I’ve been working on a design for a 3-point pressure input device and a big pile of velostat bags showed up in the mail the other day, so I’m gonna start experimenting!

Velostat bags are totally the way to go, btw. You can get one sheet of the stuff from Adafruit for like $6 or effectively a lifetime supply of bags that, once you cut them, are even bigger so you can freely experiment with ribbon controller kinds of things. I think there are 100 for like $40 from Ebay.