Getting pressure values from the touchpad

[Bert Freudenberg]

On Jan 23, 2008, at 19:52 , Benjamin M. Schwartz wrote:

> The GlideSensor measures
> capacitance, and provides 4 bits of output.  Capacitance is determined
> primarily by how much surface area of your finger is in contact  
> with the
> sensor.  It only measures pressure in the sense that pressing harder
> with your finger causes more of your fingertip to be in contact  
> with the
> sensor.
> You cannot use the GlideSensor as a scale.

... unless you have a conductive deformable ball translating weight  
to contact area ;)

- Bert -