https://wiki.tjhowse.com/ 2026-04-17T16:13:08+00:00 https://wiki.tjhowse.com/ https://wiki.tjhowse.com/_media/wiki:logo.png text/html 2019-01-05T08:39:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:electronics Power Probably a poly-crystalline solar panel directly connected to some supercapacitors with a boost circuit to get the voltage up high enough to be useful. Batteries are bad due to temperature sensitivity and cycle limits. Supercaps are better in these regards. text/html 2019-02-24T22:54:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:housing Material selection Glass Glass is pretty good. When tempered and treated it's pretty shock-resistant, can handle a wide range of temperatures, chemically stable, and handles radiation without degrading too much. Sourcing For my initial experiments I want to use recycled glass. I have lots of mirror scraps, some blown glass bottles, and a glass tabletop. I need to solve a few problems: text/html 2019-01-06T23:35:51+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:overview This project is about creating a long-lasting artefact that does something interesting. The current plan is to create a glass sphere with a cavity in the centre containing some electronics. Here's a list: * Self-powered, * Solar, * Peltier and thermal mass,work_logs index text/html 2019-01-05T09:10:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.tjhowse.com/projects:glass_sphere:work_logs I think the Youtube Videos will be the primary source of work log information, but I also want a more searchable version. I'll be recording those here.