What are some examples of a switch? • Light switch • Touch lamp • Thermostat Can you think of any others?
FYI - Types of Switches • Toggle Switch – Light Switch • Pushbutton Switch • Selector Switch • Joystick Switch • Lever Actuated Limit Switch • Proximity Switch • Speed Switch • Pressure Switch • Temperature Switch • Liquid Level Switch • Liquid Flow Switch
Definition • A switch is an electrical device, usually electromechanical, used to control continuity between two points.
Hand switches are actuated by human touch. • Limit switches are actuated by machine motion. • Process switches are actuated by changes in some physical process (temperature, level, flow, etc.).
What did you notice while you were creating your switches? • When was the circuit opened? When was it a closed circuit? How did you know? • Can you relate the switch you made to a light switch? • How do you think touch lamps work?