For those wondering like I was, mousewheels typically use optical or magnetic rotary encoders. However some do actually use potentiometers. I'm pretty sure the one pictured is an encoder though; all of the potentiometer based mousewheels I can find are way more bulky than that.
Edit: Damn it Lemmy. Fix your sorting so I'm not accidentally commenting on 4 day old posts.
I agree. Never understood why it was seen as a bad thing to respond to older comments or posts. Especially if you have something useful or good to contribute like the person above did.
I think it might be as well, that Lemmy doesn't have the ammount of content other sites have. So people like me discovering a new channel can actually scroll a lot further into the past without realizing that you've run into posts that are a year old.
I’ve never seen that and that seems wildly stupid as a mechanism. Far too flawed in comparison to an optical wheel and sensor, and it’s not like the optical sensor is expensive,