Taking a cue from the jog wheel we posted last week, [42ndOddity] has built an improved version. The design is based around a solid state rotary encoder instead of an optical encoder. The rotary encoder is far easier to attach and position properly. The knob is milled from scrap aluminum-it was a copier foot. To make the motion smooth, it’s sitting in a bearing from the same copier.
[whatsisface] sent in his scratch built clone of a Griffin PowerMate. The PowerMate… is just a big knob, so it’s easy to see why more than one person has attempted this. [whatsisface] was inspired by a bit-tech post that did nearly the same thing, only they used the head out of a VCR for the knob. All the other components, like the optical encoder, are salvaged from a mouse, which we talked about in our scavenging How-To. He used a RC car tire for the actual knob. While we’re sure it works great in dirt, we’d probably go with the weight and inertia of the VCR head instead. Have a look at the video below to see the knob being used with the Volumouse software.