The single-pole double-throw switch consists of a moving end and a fixed end. The moving end is the so-called “knife”. It should be connected to the incoming line of the power supply, that is, the end of the incoming call, and generally the end connected to the handle of the switch; the other two The terminals are the two ends of the power output, the so-called fixed terminals, which are connected to the electrical equipment.
Two functions of the single-pole double-throw switch:
One is to control the power output to two devices respectively.
The second is that one device can be controlled for different output forms.