The MEGA IO Expansion Shield can be used for a variety of interactive works, it is often used in a number of sensors or circuit. For those who are familiar with the electronic circuits or universal board with bread board module, it helps in building a simple circuit effortlessly, but for those who are not familiar with the circuit or the slightly more complex circuit it doesn't seem so easy. This sensor expansion board is able to easily connect a number of commonly used sensors. For interactive works, the focus should not be on the specific circuit configuration, but on what features needs to be implemented. So for some of the specific function of the sensor module to connect to this sensor expansion board, we need to consider how to use the Arduino.