[[abstract]]The major purpose of this research is to design a Micro-controller System that users without background in electric circuit can control I/O easily and don’t need to design complex hardware by themselves. This system complies with this two points of “program and run” and “handling operation interface easily”. The system uses MSC-51 microcontroller, including “Programmable Input Interface board” as well as “I/O link and control board” in hardware and 8, 572 line source codes, needed 22K bytes program memory in software. Following are my conclusions and suggestions from the research process: 1.The system can improve convenience for a user entries data by separated program entry and circuits install device in the system. 2.It is more flexible on the design of the system for graphic LCD. 3.The development of the system will be able to use LCD of touch PAD to reduce the keyboard space and shrink size in the future. 4.The instructions of the system can be designed more detail movement in the future. 5.After a learning activity, the result shows that the system is good for teaching. “How to use the system on teaching activities” is a good research in the future.
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