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Microcontrollers have become very useful in embedded design as they can easily communicate with other devices, such as sensors, switches, LCD displays, keypads, motors and even other microcontrollers.
A microcontroller is basically used as the brain or intelligent processing unit to control other devices connected (interfaced) to it in embedded systems just like a PLC in industrial automation.
To interface a device to a microcontroller simply means to Connect a device to a microcontroller. This article will make it easier to anybody with very limited experience in electronics to learn how to interface commonly used devices like an LED, a switch, a transistor, a relay, a display, a keypad, a buzzer and so on to a PIC microcontroller.
