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PSoC 5, 3 & 1

AlVa_264671
New Contributor II

Hi every one!!!

   

Is this the correct Forum to ask aboyr the subjet of my post ?

   

Thank you very much

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11 Replies
Bob_Marlowe
Expert II

Welcome in the fascinating world of PSoCs!

   

When you are using a PSoC3 you are quite right here. If you have got an development kit, tekk us which one and we will be able to help you.

   

 

   

Bob

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AlVa_264671
New Contributor II

Thanks Bob.!

   

What do you think about a big touchpad, let say 17" x 14" implemented with Capsense?

   

Best regards,

   

Alex101

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ETRO_SSN583
Esteemed Contributor

What resolution are you trying to achieve ? Normally for TFT this size

   

resistive TS most effective, especially if handing signature and drawing

   

capability.

   

 

   

Regrads, Dana.

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AlVa_264671
New Contributor II

Hi Dana !

   

The project I have in mind is about a small animal walkway, let's say a kind of "mat".

   

It Is for veterinary use for puppy and kitten.

   

On the other hand is capsense "sensible" to animals paws? 

   

If so, let's go from there.

   

My target is to bulid an animal walk throuhg  and detect relative animal's paws position.

   

The mat dimention need to be, let say 18"x 14".

   

The weight of the puppy or kitten will be between half a pound an 15 pound.

   

The resolution is such that it is possible to detect at least one or two point support of each leg over the mat.

   

What do think about this aplication for capsense.?

   

Which can be the disvantage ? I know the advantage.

   

 

   

Dana are posible private message in this forum?

   

Bets regards,

   

Alea101

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ETRO_SSN583
Esteemed Contributor

Some thoughts -

   

 

   

1) The mat resolution would be set by smallest paw, with oversampling. Not knowing smallest

   

paw, as an example, lets use 1 sq ". Now with oversampling by at least 2, thats 1/2" square.

   

So you would need (18 x 2) x ( 14 x 2) = 1008 elements, read I/O pins, quite impractical I

   

would think. Also the environmentals I would think a bit challenging. Pee, poop, dirt, films.....

   

Keep in mind # elements is driven by desire for positional measurment in design and I assume

   

paw size measurment as well.

   

 

   

Whereas if you used resistive touch mat, its a piece of cake, interface 4 or 5 wires, 7 if you want

   

real hi res. The controller is also trivial. Some general info -

   

 

   

    

   

          

   

http://www.cypress.com/?rID=58690

   

http://www.cypress.com/touch/?source=CY-ENG-HEADER

   

http://www.youtube.com/watch?v=7xmFZwFhDAU

   

http://www.element14.com/community/thread/26408/l/psoc-4-pioneer-kit-community-project073-tft-touchs...

   

 

   

I think for the size of the mat you are considering R touch would be the way to go, cost wise,

   

and interface repeatability and ease of implementing.

   

 

   

Regards, Dana.

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AlVa_264671
New Contributor II

Thank you Dana!!!

   

I love the resistive touch idea !!!

   

Mi question is where and how get a resistive touch os shuch magnitude.

   

Can you be so kind to give me a guidline to that ?

   

 

   

Best regards,

   

Alex101

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ETRO_SSN583
Esteemed Contributor

There are quite a few vendors making R touch screens, Taiwan based

   

especially. Just Google "resistive touch" to take a look. Many will offer

   

samples if they perceive there is a good opportunity. So if you find a

   

supplier that looks interesting, find their local sales office, contact them,

   

and maybe you can get them to sample you to get you started.

   

 

   

elotouch

   

fujitsu

   

touch international

   

.......

   

 

   

Regards, Dana.

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Bob_Marlowe
Expert II

A problem comes to my mind: Your pets have (mostly) 4 paws, does the resistive-touch distingush more than one touch at a time?

   

 

   

Bob

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ETRO_SSN583
Esteemed Contributor

The design is only for animals with 1 paw.....

   

 

   

Consider digital resistive touch screens -

   

 

   

    

   

          http://www.pannam.com/touchscreen-101

   

 

   

Regards, Dana.

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ETRO_SSN583
Esteemed Contributor

When working with R TSs there are several factors affecting

   

performance. Such as transmissivity, actuation force, etc.. So

   

use the vendors ap notes when doing the design.

   

 

   

Regards, Dana.

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AlVa_264671
New Contributor II

Thank you very much for you valuble help.����

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