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Rain Gauge Question [ SIMBLE QUESTION ]

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DEAR FRIENDS

I have a Rain tipping bucket rain gauge as shown below in the uploaded photos. The Gauge has only two wires, thus i am wondering if those wires for the voltage source, how can i read the data??

Anticipated thanks

r1.jpgr2.jpgr3.jpg
 

I would think that as the gauge tips, it closes a switch. Feed the wires via a 1K resistor from a 6V supply. The voltage will be high and pulse low as the gauge tips then comes up again. Each pulse represents a certain weight of water, which in turn represents so many mm of rain fall on the collecting funnel.
Frank
 
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