[https://www.flickr.com/photos/ranjit/33119202226/in/album-72157679851816315/]

I added a little electric motor to the minitracker [previously] and made a loop disk of my favorite bit from The Vapours by Anna Meredith. Minitracker even makes a tiny accidental light show, a tiny bit like the music video.

[video link]

The mechanical tracker was too unreliable, so I made a nearly-as-unreliable optical version.

[video link]

It’s playing the first digits of Pi.

[video link]