Multimedia in teaching a wide range of applications make teaching a more vivid image, but also limits the scope of activities of teachers, teachers can not be far away from the computer, bring a lot of inconvenience. Requirements of this subject with laser pointer, to design a remote control circuit, able to send control information PC-, PPT Courseware realize multi-form player and slide the turn of the last turn, the next turn and other functions, PPT realize remote playback.

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