Here’s how it works: the cylindrical section contains permanent magnets, and it slides back ... kind of learning process centered around exploring an idea. We’ve seen DIY linear motors ...

[Andy Pugh] found himself in need of a large linear slide, so he resorted to making his own with steel square tubing and a bit of PTFE (Teflon). The PTFE slider/spacers [Andy] needed a compact ...

Slide rules are analog computing devices marked with linear or logarithmic scales, some on a moving slide and some stationary on the base of the instrument, so that two numbers may be added or ...