Pak-8+BS2?
Hello.
Has anyone worked with the AWC Pak-8's ? I purchased mine about a week ago, and have been having problems understanding how the thing is programmed from a BS2.
Has anyone worked with the AWC Pak-8's ? I purchased mine about a week ago, and have been having problems understanding how the thing is programmed from a BS2.
Comments
>Hello.
>
>Has anyone worked with the AWC Pak-8's ? I purchased mine about a week ago, and
have been having problems understanding how the thing is programmed from a BS2.
Hi - Charley
If you haven't looked yet, wander over to Al's web site to the PAK-8 section
which can be found here:
[noparse][[/noparse] http://www.al-williams.com/awce/pak8.htm ]
Hope that gets you started.
Regards,
Bruce Bates
program the Pak8, which because of Al Williams (THANK YOU AL!) help, I am
now all set. I made a circuit board out of a Radio Shack Component board
which already had the copper on it, just had to make the solder connections.
Original Message
From: "john & lisa" <johnlisa@c...>
To: <basicstamps@egroups.com>
Sent: Tuesday, November 21, 2000 5:09 PM
Subject: Re: [noparse][[/noparse]basicstamps] Pak-8+BS2?
> If your using stripboard to build your PAK-VIII circuit you'll find a 10
to
> 15 nf capacitor from the middle pin on the resonator to ground, and a 10k
> resistor across the two outer pins of the resonator, really helps. I spent
> hours trying to get the circuit to work until Al told me about these
mod's.
> As for the programme well it's all double Dutch to me.
>
Original Message
> From: Bruce Bates <bvbates@u...>
> To: <basicstamps@egroups.com>
> Sent: Saturday, November 18, 2000 3:55 PM
> Subject: Re: [noparse][[/noparse]basicstamps] Pak-8+BS2?
>
>
> > At 10:49 AM 11/18/2000 -0500, you wrote:
> > >Hello.
> > >
> > >Has anyone worked with the AWC Pak-8's ? I purchased mine about a week
> ago, and have been having problems understanding how the thing is
programmed
> from a BS2.
> > Hi - Charley
> >
> > If you haven't looked yet, wander over to Al's web site to the PAK-8
> section which can be found here:
> >
> > [noparse][[/noparse] http://www.al-williams.com/awce/pak8.htm ]
> >
> > Hope that gets you started.
> >
> > Regards,
> >
> > Bruce Bates
> >
> >
> >
> >
> >
>
>
>
>
circuit construction. Here are a few tips that will generally apply to any
circuit like a PAK-V to PAK-VIII that uses a 50MHz oscillator.
1) Keep the leads very short. This includes the ground lead from the center
leg.
2) You may have better luck starting the oscillator with a small capacitor
(15pF or so) from either of the end leads of the resonator to ground. You
can also try from both end leads of the resonator to ground. You should not
need any capacitance on the center leg unless you are having grounding
problems to begin with. If you are using a prototyping board, you probably
don't need any capacitors. Double-sided PC board construction with a ground
plane probably doesn't need any capacitance either. Your milage may vary and
you may get better results with a larger or smaller capacitor depending on
the stray capacitance in your circuit which we can't control.
3) A 10K resistor across the two outer pins of the resonator may help the
clock start.
I'm planning on documenting all this soon, but just in case anyone else is
having this sort of problem I thought I'd mention it now. The problem is, of
course, each case is different. I'd say 99% of these start right up with no
external components at all.
The number one problem we see with these resonator circuits is long leads
(excluding bad solder joints and bridges). A scope is very helpful to see if
the oscillator is running or not. Even if you don't have a 50MHz scope you
should see some activity on the clock pins.
Hope that helps.
Al Williams
AWC
* Floating point math for the Stamp, PIC, SX, or any microcontroller at
http://www.al-williams.com/awce/pak1.htm
15 nf capacitor from the middle pin on the resonator to ground, and a 10k
resistor across the two outer pins of the resonator, really helps. I spent
hours trying to get the circuit to work until Al told me about these mod's.
As for the programme well it's all double Dutch to me.
Original Message
From: Bruce Bates <bvbates@u...>
To: <basicstamps@egroups.com>
Sent: Saturday, November 18, 2000 3:55 PM
Subject: Re: [noparse][[/noparse]basicstamps] Pak-8+BS2?
> At 10:49 AM 11/18/2000 -0500, you wrote:
> >Hello.
> >
> >Has anyone worked with the AWC Pak-8's ? I purchased mine about a week
ago, and have been having problems understanding how the thing is programmed
from a BS2.
> Hi - Charley
>
> If you haven't looked yet, wander over to Al's web site to the PAK-8
section which can be found here:
>
> [noparse][[/noparse] http://www.al-williams.com/awce/pak8.htm ]
>
> Hope that gets you started.
>
> Regards,
>
> Bruce Bates
>
>
>
>
>