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WATER SEEPAGE ALARM
This simple circuit sounds a beeper when its electrodes detect water. A single 1.5v N cell powers it. A small 1.5v button battery will also work.
Links to electronic circuits, electronic schematics, designs for engineers, hobbyists,
students & inventors:
Plants Watering Watcher #3: Varying brightness LED signals the necessity to water a plant. Very Low consumption,3V
powered Circuit (added 9/04)
Pot Plant Power: All plants carry an electric charge relative to the ground. This charge is more or less constant
regardless of the size of the plant a kind of background voltage" in nature. This electric charge suffuses the entire plant, from its roots to its leaves and fruit. It was measured between a
chrome-plated pin inserted into the plant (the positive terminal) and an iron spike driven into the ground (the negative terminal). (added 6/03)
Water Level
Reference Design: The Water Level Reference design continuously monitors water level and water flow using the temperature compensated MPXM2010GS pressure sensor in the low cost
MPAK package, a dual op–amp, and the MC68HC908QT4, 8–pin microcontroller. This system uses very few components, reducing the overall system cost. This allows for a solution to compete with a
mechanical switch for water level detection but also offer additional applications such as monitoring water flow for leak detection, and the other applications for smart washing machines.
(app note added 3/05)
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