Before you even ask, it’s an open source trackball and you’re gonna like it. Hackaday Editors Mike Szczys and Elliot Williams get down to brass tacks on this week’s hacks. From laying down fatter 3D ...

Adding linear rails to a length of aluminium extrusion is a common way to make a fairly rigid guiding structure, and I have been doing just that in the workshop. But things were not working quite ...