In most non-battery applications, the power to the
microcontroller is normally supplied using a wall
mounted transformer, which is then rectified, filtered
and regulated. In most applications, this method of
generating the regulated voltage is cost effective and
can be justified. However, there are applications where
the PIC12/16/17 is the main controller and low voltage
is not required by other components except the PIC12/16/17.
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