Although more expensive then the 7805 try using a switcher, they are much
more efficient. TTYL

> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of John Waters
> Sent: Sunday, July 22, 2001 12:18
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [OT]: How to reduce power consumption for battery operated
> circuits?
>
>
> 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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