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A controller is a device that controls another device. The simplest example is a game controller. It is used to control action in a game.

Then there are electronic controllers. They are IC chips that are used to provide control logic for electronic devices. A floppy drive would be connected to a controller chip that produces the control signals needed for the drive to operate.

Then there are microcontrollers which are essentially small computers on a single chip with limited functionality. They would be used in appliances, vehicles, implanted medical devices, etc. Some operate as slow as 4 KHz and only handle 4 bits of data.

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10y ago

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