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; ...
The Dpi32 and CNi32 high accuracy series of 1/32 DIN programmable temperature/process meters and PID controllers feature RS-232 and RS-484 communications. These user friendly, easy to configure units ...
Self-regulating systems with feedback loops, i.e., the routing back of the output of a system to its input, have existed since antiquity and have since become an integral part of modern technology.