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如何自制报警器

更新时间: 2020-07-01 00:00:00     

1、首先,将两节电池以相反方向粘在夹子的两边;

2、接着,给电池两极都焊上焊点;

3、塑料夹子的两头钻孔,扭上螺丝钉;

4、将一个报警用的蜂鸣器焊接到电池与螺丝钉之间;

5、再用导线将其他部位连接起来即可。

关键词: 如何 自制 报警器

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