Bob Blick wrote:
>
> > I have a PIC controlled circuit that also includes an LM386 audio
> > amplifier. When I put the PIC into sleep mode, I'd like to eliminate the
> > power drain of the amp. I can use a relay to do this but I figure that
> > there is probably some very clean solid state way to accomplish this.
>
> Hi John,
> Let me rush in here before several other people tell you to replace that
> useful inexpensive LM386 chip with some expensive unavailable chip just

Would that be an LM-Pentium II?


> Use a PNP transistor as a switch for the power on the LM386.
<snip>

Or a Logic Level controlled P-channel MOSFET if the base current
wastes too much power. However, since Bob gave you an extra I/O
pin, you might want to consider using it to power the LM386 -
assuming that you were running the LM386 off of 5 volts...

Scott