At 06:44 PM 9/11/01 -0700, you wrote: >Is it possible to use force sensing resietors? >Also called fsr's Actually that was my first thought about this. A fsr on a bending beam or something close. I don't know if something could be made with enough accuracy or repeatability for this. I've only worked with them a couple of time a few ice ages ago so I'm not at all sure they could do this. I also wonder if they would have to be temperature compensated and calibrated. In a way this is a very interesting little project as it has to be accurate, has to be pretty tough has to function in sub zero temps and high altitudes. Of course the buggers want em cheap ;-] Dave -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.