Yes, of course it's a typo :)
I have both Vdd to +5 and both Vss to GND.
/MCLR is pulled up with a 10k resistor (also tried 1k).

Still having exactly the same problems.

Any more ideas?

/frax

----- Original Message -----=20
From: "Derek Cowburn" <derek@COWBURN.US>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, August 06, 2002 4:53 PM
Subject: Re: [PIC][EE]: Unstable circuit


> > > I have tried to put +5 on either and both of the VDD pins,
> > same thing with
> > the VSS.
>=20
> +5 to both Vdd.  Vss to Ground (not +5).  Typo?
>=20
> I had a similar problem and it was the /MCLR was not pulled high like =
Mike
> indicates below.  Same "touch it and it resets" effect.
>=20
> -Derek
>=20
>=20
> > -----Original Message-----
> > From: Mike Pink [mailto:mjpink@KINGSTAG.COM]
> > Sent: Tuesday, August 06, 2002 2:21 AM
> > To: PICLIST@MITVMA.MIT.EDU
> > Subject: Re: [PIC][EE]: Unstable circuit
> >
> >
> > You don't mention -mclr
> >
> > Pull it up to Vdd with a 4k7 resistor
> >
> > Mike
> >
> >
> >
> > ----- Original Message -----
> > From: "Fredrik Axtelius" <fredrik.axtelius@TELIA.COM>
> > To: <PICLIST@MITVMA.MIT.EDU>
> > Sent: Monday, August 05, 2002 11:59 PM
> > Subject: [PIC][EE]: Unstable circuit
> >
> >
> > > Hi!!
> > >
> > > I have a PIC16F877 circuit and im having big problems to
> > get it stable.
> > >
> > > Problem:
> > > It will only run for a short time and only if im touching
> > GND with one
> > hand.
> > > When I touch GND with one hand all I have to do is wave the
> > other hand a
> > few inces from the circuit to get it to reset, now if I keep that =
hand
> > really still I can watch it run for like 5-10 secs before it
> > lock ups (not
> > resets).
> > >
> > > Hardware:
> > > All I have is a 4Mhz 16f877, osc caps are 27p
> > > One LED on RC4 with a resistor to GND.
> > > Max232 with all the caps on RC6 and 7. The other end of the
> > max232 is
> > connected to my com1.
> > > A reset button with a 10k pullup resistor.
> > > All my cables are short and nicely layedout and my
> > powersupply delivers a
> > stable +5v.
> > >
> > > What I have tried so far:
> > > I have tried to put +5 on either and both of the VDD pins,
> > same thing with
> > the VSS.
> > > I have put caps between none, either or both of the VSS/VDD pins.
> > > I disconnected the Max232 on rc6 and rc7, still the same problem.
> > > I tried a 16f874 at both 20 and 4Mhz, same thing.
> > >
> > > Help me!
> > > /Fredrik
> > >
> > > --
> > > http://www.piclist.com hint: PICList Posts must start with
> > ONE topic:
> > > [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other
> > [BUY]:,[AD]: ->Ads
> > >
> > >
> >
> > --
> > http://www.piclist.com hint: The list server can filter out =
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> >
> >
>=20
> --
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>=20
>=20
>

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