Hi All,

For a battery operated circuit, we want the power consumption to be as low
as possible, but if the circuit involves a microcontroller, we will need a
voltage regulator like the 78L05 or 7805 to keep the 5V stable. Since the
supply voltage is at least 2V higher than the 5V, part of the current will
be bypassed through the regulator, in other words, the regulator "consumes"
some power even when there is no or little current demanding by the
microcontroller circuit itself.

Is using the regulator unavoidable? What is the usual methods to reduce
power consumption for a battery operated microcontroller circuit?

Thanks in advance!

John





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