I've been designing a smps, and I wonder, is there an elegant way to design the input stage of the psu to be able to run from ~85-240VAC? I don't fancy using active PFC, and would like to keep it simple. Preference is for the voltage to automatically be detected so they don't have to switch a switch based on where they live. Cheers Ryan --=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 .