Water Flowing in Pipe Indicator -- July 6, 2009

Published:2012/9/9 20:30:00 Author:Ecco | Keyword: Water Flowing, in Pipe, Indicator | From:SeekIC

The vibrations associated with water flowing through a pipe are picked up by an inexpensive piezoelectric wafer. The signal from the wafer is first boosted by a micropower transistor amplifier and then fed to an ultra low power voltage comparator. When the vibration signal has sufficient amplitude, a FET transistor switch is activated. Drawing only 6uA, the whole circuit is powered by a lithium coin battery, which should power the circuit for many years. Source: discovercircuits



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