I was hoping that somewhere in Piclist land, there was someone who could point me in the direction of the parameters of the magnetic fields used in such devices. The thread seems to be completely divorced of any discussion in that direction. I did post it in [EE] for a reason. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .