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Miner lamp battery alarm circuit diagram

2016-05-10 11:05  
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Miner lamp battery alarm circuit diagram
This circuit uses the miners lamp battery as its power source, and it isinstalled in ore cap, when gas is over, the head lamp buld will automatically flash, and itis accompanied by alarm sound. This circuit uses less component, and ithas no influenceon miner's normal work,it costs low with adjustable emergency alarm, and it is easy to carry.