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1:14 PM
I don't know how this circuit can produce sound since the capacitor won't be able to discharge when it's raining
or am I missing something here
the Prob is a rain sensor
 
 
3 hours later…
3:56 PM
@VioAriton good question. I think it relies on the speaker being inductive. Did you try emulating the circuit in a Spice or other decent circuit emulator to see if it is reasonable to assume it will work? Doesn't look like a very robust circuit to me.
 

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