This tutorial will show you how to increase the number of steps of volume control in Android. The default number of steps (for music/media volume) is 15, which is fine for most people. However, I have a pair of headphones which are very loud even at the lowest volume setting, so I changed it to 30 steps.
I have been developing a dolly for shooting timelapses for a few months. My goal was a low cost and lightweight system that was portable enough to be backpacked with. While both the mechanical and electronic aspects are a work in progress, the rail is at the state of being usable in the field.
Shooting at Carkeek Park, Seattle