A diode is a two-terminal component in electronics with a unidirectional flow of current. It offers low resistance in the direction of current flow and offers high resistance in the opposite direction. Diodes are mostly used to prevent damage to components, especially due to electromotive force in circuits which are usually polarized.
Because input devices are geared toward user-computer interaction, they are used to transform user actions or commands into electronic signals that are understood by computers.
Examples of input devices include:
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