> > > Just for reference, a sinusoidal acceleration of 1 g peak > amplitude at a frequency of 1 Hz produces a peak-to-peak > displacement of 19.56 inches. At a given g level, displacement > varies inversely with the square of frequency. I'm pretty sure there have been quakes with >1G accelerations. But you WONT sleep through them. -- > Feel the power of the dark side! Atmel AVR -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist