Shape Memory Alloy Sensing And Actuation Switch

A device comprising:

• a moving mechanism configured to be disposed in any of a closed position and an open position;
• and
• a shape memory alloy (SMA) actuator comprising:
• a first actuator arm including:
• a fixed end fixed to a base;
• a free end that is unfixed;
• and
• an SMA wire disposed from at least the fixed end to the free end, wherein the free end is configured to move in a positive direction in response to a current being applied to the SMA wire, wherein the moving mechanism is configured to restrict movement of the SMA actuator or change a resistance of the SMA actuator in the closed position, and wherein a closed position resistance of the SMA actuator when the moving mechanism is in the closed position is different than an open position resistance of the SMA actuator when the moving mechanism is in the open position.