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Tex

Tex

V2EX member #207558, joined on 2016-12-25 21:08:23 +08:00
Tex's recent replies
Jan 18, 2017
Replied to a topic by martyyyyy 奇思妙想 想远程检测厕所是否有人,求讨论
装个红外感应器,再在正前面装一个很小的镜子,如果有人的话红外线就会被挡住,然后红外感应器接收不到红外线就会发出信号,这样就知道了
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