20-11-2009, 08:43 PM
pls send me details abt Rain detector
20-11-2009, 08:43 PM
pls send me details abt Rain detector
22-11-2009, 01:55 PM
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://www.techlibelectronics/raindetectors.htm http://www.electronic-circuits-diagramsalarmsimages/alarmsckt4.shtml http://cytiumhobby/rain.pdf |
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