多媒体在教学中的广泛应用使教学更加生动、形象，但也限制了教员的活动范围，教员不能远离电脑，带来诸多不便。本课题要求借助激光教鞭，设计一套遥控电路，能够向PC机发送控制信息，实现PPT课件多窗体交替播放及幻灯片的上翻、下翻等功能，实现PPT遥控播放。-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.