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Arduino Projects to Save the World by Emery Premeaux

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C H A P T E R  3

Jungle Power

Keeping an Arduino Alive in the Field

One aspect of electronic sensors deployed in the field that is quite difficult to deal with is that of power management. Sensors obviously need electrical power to operate, but it is usually impractical to run long power cables out to the sensor’s location. Often, there isn’t even a power grid to connect up to. This leaves relatively few practical options.

Most often, field sensors are powered by battery sources. This gives them a limited operational life span. Your equipment can operate only as long as the battery pack has power. To be more accurate: only as long as your battery pack has enough power to keep the sensor going. When the voltage in the pack drops below a certain ...

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