Water tap as touch button

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cross mob
Anonymous
Not applicable
        I would like to use the water tap as the touch device to switch it on/off.   
Uptill now I wasn't able to find anything alike.   
Is there any knowledge about that kind of application?   
   
Thanks   
   
Rens   
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5 Replies
pushekm_21
Employee
Employee
10 likes received 5 likes given First like received
        Hello Rens,   
   
You want to implement this like a proximity sensor or a normal touch button. Both the kind of application you'll be able to implement with capsense technology. Let me know which kind of application you are interested in, accordingly I'll point you to the application notes.   
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Anonymous
Not applicable
        Hello Pushek,   
   
Actually I want both. In some environments proximity is best (think of hospitals wher surgeons shouldn't touch anything) in some touch is best (kindergarten or normal bathrooms). So application notes to both would be welcome.   
   
Thank for the quick reply   
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Anonymous
Not applicable
        Hello,   
   
Maybe I am a bit impatient, but I would like to continue and my project is "pushing".   
I tried to find the application notes Pushek was talking about, but I couldn't.   
I also don't know (and cannot make a choice) what technology would do best (CSD or CSA)   
and consequently what PSoC is best to be ordered.   
So.... please guide me a little bit further.   
   
Thanks   
Rens   
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MR_41
Employee
Employee
First like received

Hello Rens,

The best technology for proximity sensing is CSD. You will get better sensitivity from CSD than CSA. For your application, you can choose a controller from the CY8C21x34 family. The difference between the proximity and touch is only in setting the some parameters of the CSD like resolution and finger threshold.

If you set the resolution of the CSD to 15 or 16 bits, you will get higher sensitivity and hence you can use this as a proximity sensor. Using a resolution of 9 or 10 bits will reduce the resolution and you can use it as touch sensing. I would suggest you to go through the below resources to get a better idea about the technology.

Technical Article - http://embeddeddsp.embedded.co...calinsights/210600870

Video - http://www.cypress.com/?app=video (Click on the Building a Proximity detector using PSoC link)

Application Notes:
http://www.cypress.com/?rID=2887
http://www.cypress.com/?rID=2883
http://www.cypress.com/?rID=2784
http://www.cypress.com/?rID=2890
http://www.cypress.com/?rID=2742

Also, go through the CSD user module data sheet. The data sheet will give you all information on how to use the user module.

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Anonymous
Not applicable
        Thanks a lot.   
I'll dive into it.   
   
Best regards   
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