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Choosing a Power Source

The last thing I need to work out before getting on with the schematic is which battery chemistry I’m going to use.  The most important thing at this point isn’t necessarily identifying the exact battery I want to use, I need to just know the voltage, such that I can design the circuit to suit.

In order to work out the ideal battery chemistry, I need to work out how much each component draws, both in sleep mode and at its peak.

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