Please i have a project on the construction of sensor that controls the movement of the students in my university through the use of the master cards as input signals. I am a Nigerian and my country is still in the process of development. the master card to me after due consideration is the best input signal because it is used by virtually all students. please i need your suggestion on how to go about it. you can also give little drawing of the circuit design. i want anxiously for your suggestions. Thanks
