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[ts-7000] Re: Problem with keypad wire. TS-7200

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Subject: [ts-7000] Re: Problem with keypad wire. TS-7200
From: "salazarluquin_sf" <>
Date: Fri, 04 Jul 2008 20:04:47 -0000
Ok. Thank you. I am going to try to do what you say to me with the 
micro. I hope that it works. I thought the same thing about the 
signal propagation problem but I needed the second opinion to make 
conclusions. Thank you a lot.

Regards,
Sergio

--- In  "javierroitman" <> 
wrote:
>
> The problem is that you cannot use such a long cable with a 
passively 
> driven keypad. Do not go over 1-2 feet for reliable results. The 
keypad 
> is supposed to be *very* close to the TS7000. 
> If you need to move the keypad far away from the TS you should 
better 
> consider implementing the keypad scanning code in a microcontroller 
and 
> connect it to the TS through a serial port. 
> Or find the way to have the TS close to the keypad... 
> I guess that you will also want to have an LCD next to them, and 
the 
> LCD does not like long cables either(not longer than 6 inches).
> It is not a matter of the kind of cable you are using. It is a 
matter 
> of signal propagation and no cable will work reliably for your 
lengths.
> 
> Regards,
> Javier////
> 
> 
> --- In  "salazarluquin_sf" <salazarluquin@> 
> wrote:
> >
> > Hello, I Am trying to use a cable of 10 feet with my keypad and I 
use 
> > the code of sample that provide with the documentation of the ts-
7200 
> > nevertheless the keypad does not work very well. I think that it 
is a 
> > kind of noise in the cable. What can I do to solve this problem 
or 
> what 
> > type of cable I have to use? Thank you.
> > Note: I use the same cable in 4 feet and works well, but I need 
it 
> for 
> > 10 feet.
> > 
> > 
> > 
> > 
> > Sergio
> >
>



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