1: A lightbulb with the switch open and closed [2] 1 above shows an... | Download Scientific Diagram
Original new 100% double closed limit switch two normally open normally closed switch ADZ-10GW2-B - AliExpress
Switch An opening in a circuit which can be closed to allow current to flow. Switches have only two states – on or off. | Door alarms, Circuit, Building a door
Electric Circuit - Diagram, Symbol, Open and Closed Circuit - Teachoo
Watson
Normally open” switching function with pressure switches
switches - "Normally closed" switch: does it use more power than a "Normally open" for a low-power battery-powered ATtiny project? - Electrical Engineering Stack Exchange