I wouldn't recomend it for what you need.  The whole idea of that is 
that you change the capacitance of the capacitor.  Just putting it in 
your shirt pocket will probally trigger things.  Try membrane switches 
instead.

Philip Pemberton wrote:

>Hi,
>  I've just been looking at <http://www.bytecraft.com/touchsw.html> - has
>anyone tried out the circuit on that page? Does it work?
>  Even better - does anyone know if there's a way to reduce the number of I/O
>lines in a similar way to a matrix of pushbuttons? I want something small,
>with at least 12 keys, hooked up to a 16F628A (eventually). The whole
>device - including the 3x4 keypad array - is going to be around the size of a
>credit card.
>  Am I stuck with normal mechanical switches?
>
>Thanks.
>  
>

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