Absolute rotary encoders use optical, mechanical, or magnetic indexing for angular measurement. They do not lose their position after power-down, but instead provide absolute position upon power-up without requiring a home cycle or any shaft rotation.
Joystick controllers use potentiometric, inductive or photoelectric sensing systems and/or switches to translate joystick motion into an output signal.
Resistors are electrical components that oppose the flow of either direct or alternating current. They are used to protect, operate, or control circuits.
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