For one thing, this circuit supplies the PIC with 9V (minus vce of the
transistor of course) which will result in one thing: an unhappy PIC. You
should have a voltage regulator somewhere in the circuit, preferably *after*
the transistor (to cut down on the leakage current when power is off)
If somebody complains about the ~8.3V seen on RA4 when power is off, see the
thread elsewhere on the list lately talking about this.

Brian
-----Original Message-----
From: Octavio Nogueira <nogueira@MANDIC.COM.BR>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Friday, December 19, 1997 8:45 AM
Subject: How to turn it off


>I'm developing a battery operated device with 16C71 and I need the 16C71
>to turn the power off. I thought in a transistor controlled by RA4.
>Please take a look in the attached file (just 2K) and say if it's safe.
>Or, does anyone have a better idea?
>
>Regards,
>
>Octavio
>======================================================
>Octavio Nogueira  - e-mail:   nogueira@mandic.com.br
>http://www.geocities.com/~oct_nogueira
>"ProPic" Production PIC Programmer Windows under US$20
>======================================================
>