1) Electrical component
Found on
https://www.crosswordclues.com/clue/control-knob
A control knob is a rotary control used to provide input to a device when grasped by an operator and turned, so that the degree of rotation corresponds to the desired input. Such knobs are one of the most common components in control systems and are found on all sorts of devices. Such knobs vary greatly in form, but as a rule they are expected to ...
Found on
http://en.wikipedia.org/wiki/Control_knob
No exact match found.
