Rain Detector

Published:2013/7/28 20:10:00 Author:muriel | Keyword: Rain Detector | From:SeekIC

This circuit uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer. The SCR could also be used to activate a relay, turn on a lamp, or send a signal to a security system. PartsR1 1K 1/4 W ResistorR2 680 Ohm 1/4 W ResistorD1 1N4001 Silicon DiodeBZ1 12V BuzzerS1 SPST SwitchSCR1 C106B1 SCR 106CYSENSOR See NotesMISC Board, Wire, Case, PC Board (For Sensor) Notes1. The sensor is a small piece of PC board etched to the pattern showen in the schematic. The traces should be very close to each other, but never touching. A large spiral pattern would also work.2. Make sure to use a loud buzzer.



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