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Rain Detector Last Updated on:
Monday, October 03, 2011 06:07 PM
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
Rain Alarm - This circuit consumes no current until moisture is
detected on the rain plate.
Rain Alarm - This circuit gives out an alarm when its sensor is
wetted by water. A 555 astable multivibrator is used here which gives a tone
of about 1kHz upon detecting water. The sensor when wetted by water
completes the circuit and makes the 555 oscillate at about 1kHz. [Radioland.nt.au]
Rain Detector (Aaron Cake) - 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. (circuit / design added
8/03)
