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Introduction of a simple rain detector

2015-01-10 07:14  
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This article is a simple rain detector introduction. You can combine this circuit diagram to understand. Figure: This circuit uses a sensor is etched by a small PC  board and a simple thyristor circuit detects rain and buzzer. The SCR can also be used to activate a relay, turn on the light, or send a signal to a security system. The rain sensor detector block is a small printed circuit board etching of the sentence. Traces should be very close to each other, but never touch. Make sure to use a loud hum, a large spiral pattern would work.