---- Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> wrote:
 I was awfulling impressed with a phone that had a carpenter's level
> function ...
> and I just can not imagine how that device does that, it's fully electronic,
> no bubles or anything.
> A chip that can tell if it's level or tilted ?

May have a tiny vial of mercury.  After all, phones and other electronic devices have all sorts of toxic materials in them without disclosure, why not mercury?  When the mercury horizon is tilted, a circuit could detect that.  See:

http://www.ehow.com/how-does_5262037_inclinometer-work.html

DMc