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Capacitive Touch Slider

 
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Kova



Joined: 06 May 2007
Posts: 35

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Capacitive Touch Slider
PostPosted: Sat May 01, 2010 2:35 pm     Reply with quote

Hi all,
I want to build my first capacitive touch pic-project Smile.
I read a lot of pdfs downloaded from Microchip (in particular AN1250), I want to handle the capacitive touch slider.
At the page 13 of AN1250 microchip sheet, there are 4 equations.
In CCS there are the "touch functions", but I want to know how I can obtain in CCS the values "Captured Left Base Capacitance" and "Captured Right Base Capacitance" that appears in the Microchip sheet.
And Current left and right values are 0 for the first iteration and "left and right position values" for the 2 to n iteration?

Some advice for the circuit/printed scheme?

Sorry for my english :-)
Bye
Kova



Joined: 06 May 2007
Posts: 35

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Re: Capacitive Touch Slider
PostPosted: Sat May 15, 2010 12:48 am     Reply with quote

Nobody? Crying or Very sad
mskala



Joined: 06 Mar 2007
Posts: 100
Location: Massachusetts, USA

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PostPosted: Sat May 15, 2010 7:33 am     Reply with quote

I have not used this, but reading over, it looks like all they mean by
Captured Left Base Capacitance is the A/D reading. Do the A/D
conversions and save them for the equations.
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