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I had removed the pic just to be sure...no luck though.
Thanks,
FJ


From: Rolf <learr@rogers.com>
Reply-To: "Microcontroller discussion list - Public." <piclist@mit.edu>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Subject: Re: [PIC] one button on/off circuit problem
Date: Mon, 11 Jun 2007 23:15:26 -0400

Not as simple as having the pin A1 configured as output and set low?
Always see 0V that way ;-)

Rolf

fred jones wrote:
 > Thanks for the reply.  I understand this.  Sorry if I didn't make it=20
clear.
 > In order for this to work, as I understand it, there should be a high =
on=20
the
 > A1 PIC pin and when the button is pressed, the PIC should see it go lo=
w=20
and
 > then take A0 low in code.  The problem is that I can't get 5V on the A=
1
 > line, it stays low no matter what I've tried as previously explained. =
 I
 > figured putting a 10K pullup resistor to 5V on the A1 pin would give m=
e a
 > constant 5V on the A1 pin until the button is pressed but still it=20
doesn't
 > give me 5V on the A1 pic pin.
 > Thanks,
 > FJ
 >
 >
 > From: Kevin Timmerman <lists@pcmx.net>
 > Reply-To: "Microcontroller discussion list - Public." <piclist@mit.edu=
>
 > To: "Microcontroller discussion list - Public." <piclist@mit.edu>
 > Subject: Re: [PIC] one button on/off circuit problem
 > Date: Mon, 11 Jun 2007 22:30:57 -0400
 >
 > A.1 is an input to the PIC so it can read the switch state.
 >
 > To turn power off, set A.0 low.
 >
 >
 > At 09:46 PM 6/11/2007, you wrote:
 >  >Hi all,
 >  >I need to ask for help on something cause I obviously don't know wha=
t=20
I'm
 >  >doing ;-)
 >  >
 >  >I took this circuit here:
 >  >http://www.pic101.com/pushpush.gif
 >  >And I replaced the pass transistor with a P channel FET.  I can get =
it=20
to
 >  >turn on and latch with taking the pic pin A0 high, However I can't t=
urn=20
it
 >  >off by getting 5V on pin A1.  I put a 10K resistor on the A1 line to=
 5V
 > but
 >  >don't get a high.  I tried it with the 4.7K from collector to Gate a=
s
 > shown
 >  >and without.  I tried a 1Mohm resistor from Gate to Source in place =
of=20
the
 >  >10K.  No difference in any case.  I can't see a 5V signal at A1.  He=
lp
 > with
 >  >what I'm doing wrong is greatly appreciated.
 >  >Thanks,
 >  >FJ
 >  >
 >  >_________________________________________________________________
 >  >Get a preview of Live Earth, the hottest event this summer - only on=
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