文件名称:House_Security_System
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Here is a low-cost, invisible laser
circuit to protect your house
from thieves or trespassers. A
laser pointer torch, which is easily available
in the market, can be used to operate
this device.
circuit to protect your house
from thieves or trespassers. A
laser pointer torch, which is easily available
in the market, can be used to operate
this device.
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House_Security_System.pdf