Potted Plants Water Tester Introduce The Principle

2016-01-23 06:42  
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This article describes is check whether there is water potted plant equipment principle. The device is simple: you put two probes (clips) to potted plants, if the LED lights, it means that there is water in potted plants. You need to adjust the 47k potentiometer to set the level at which the  LED  goes on.




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