How to Make Electric Bell Electric Door Alarm 简单方法DIY电铃开门报警器
Автор: KJDOT (科技DOT)
Загружено: 2017-11-25
Просмотров: 31016
How to Make Electric Bell Electric Door Alarm
（Materials required）配件表
Enameled wire 0.25mm漆包线https://goo.gl/ksS2M5
9v battery snap 9V电池扣https://goo.gl/BK74HS
9v battery 9V电池
plank 木板
Bicycle bell shell 自行车铃铛外壳
Iron plate and stainless steel shrapnel 铁片和不锈钢弹片
screw螺丝钉
switch 船型开关
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