capacitive touch button for the 16f887

[vicce67]

Dear friends,

Somebody has a good example of capacitive touch button for the 16f887 in pbp.

in advance thankful,

vicente.

[Acetronics2]

Hi, Dear Friend,

may be a look here could be useful for You :

http://techtrain.microchip.com/webseminars/ArchivedDetail.aspx?Active=149

Now, I do not remember any '887 programs about " Button touch " had been posted here ...

may be some pointers here : http://www.picbasic.co.uk/forum/showthread.php?t=10578&p=71611#post71611

try the SEARCH function of the forum to be sure ...

Alain

[rsocor01]

Dear friends,

Somebody has a good example of capacitive touch button for the 16f887 in pbp.

in advance thankful,

vicente.

No, the 16F887 won't do it. You need a chip with a CSM (Capacitive Sensing Module) built in. Take a look at the PIC16F72x and PIC16F193x series.

Robert

[Ioannis]

No, the 16F887 won't do it. You need a chip with a CSM (Capacitive Sensing Module) built in. Take a look at the PIC16F72x and PIC16F193x series.

F887 will do it. In fact every chip with ADC can do it with some effort.

At www.microchip.com/mtouch there are alot of app. notes and informations. Look for the more recent files.

They have theory of the various phases of the touch evolution.

First there was the charge/discharge with a loop through the micro, then the S-R Flip flop which I recall the F887 has inside, then the ADC use etc.

Of course it is a lot easier with a dedicated module for the the touch senors.

Ioannis

[rsocor01]

F887 will do it. In fact every chip with ADC can do it with some effort.

Yes, it will do it. But you need some external components. With CSM no external components are required and it is much easier.

Robert

[mackrackit]

http://www.picbasic.co.uk/forum/showthread.php?t=2671