Some kind of continuity beeper has been a standard piece of gear since the dawn of electronics. Sure, you probably have an ...

A magnetometer is a device that measures magnetism: the direction, strength, or relative change of a magnetic field at a ...

Hot glue guns are pretty simple beasts: there’s an on/off switch, a heating element, and a source of current, be it battery or wired. You turn it on, and the heater starts warming up; ...