[Erich] is the middle of building a new competition sumo bot for 2018. He’s trying to make this one as open and low-cost as humanly possible. So far it’s going pretty well, and the quest to make DIY ...

When you think about highly-precise actuators, stepper motors probably aren’t the first device that comes to mind. However, as [Diffraction Limited]’s sub-micron capable micro-manipulator shows, they ...

A magnet is a metal that can attract (pull) or repel (push) other types of metals. Every magnet is a metal, but not all metals are magnets. The force of magnets is called magnetism. Magnetism can work ...