pls send me details abt Rain detector

a rain detector can alarm you when a small drops of water fall on the setup; it will save you the trouble of looking out the window every second when you want to catch the start of a rain storm, or cover some water sensitive stuff on your backyard. The following schematics are simple, but they can give design ideas or serve as a part of a more complex circuit like a computer weather data collection system.And you can add somr more dedication to plot graph for rain availability,
see
here 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


R1


1


1K 1/4 W Resistor


R2


1


680 Ohm 1/4 W Resistor


D1


1


1N4001 Silicon Diode


BZ1


1


12V Buzzer


S1


1


SPST Switch


SCR1


1


C106B1 SCR


106CY

SENSOR


1


See Notes


MISC


1


Board, Wire, Case, PC Board (For Sensor)


or
see
http://techlibelectronics/raindetectors.htm
http://electronic-circuits-diagramsalarmsimages/alarmsckt4.shtml
http://cytiumhobby/rain.pdf