自动充电演示笔设计与研究

Design and Research of Automatic Charging Laser Pointer with Remote Control

多媒体授课过程越来越依赖演示笔的使用,由于便携性的限制,电池容量无法大幅提升,故市面上的演示笔续航能力普遍较差,需要频繁充电或更换电池以免使用时断电,影响正常的教学活动。本设计对演示笔的充电装置进行改造,以提升演示笔的实用性,选择合适的充电电池、充电管理模块,设计接口电路,实现使用演示笔时,电脑通过USB接口向充电模块充电;演示结束后,充电模块自动给演示笔内电池充电。

The multimedia teaching process relies more and more on the use of the laser pointer with remote control(PPT pen).Due to the limitation of portability,the battery capacity cannot be significantly improved,so the battery life of the PPT pen in the market is generally poor,which requires frequent charging or battery replacement to avoid power failure during use,affecting the normal teaching activities.In this design,the charging device is reformed to improve the practicability of the PPT pen.Appropriate charging battery and charging management module are selected.Interface circuit is designed to realize that when using the PPT pen,the computer can charge the charging module through USB interface.After the demonstration,the charging module will automatically charge the battery in the PPT pen.