>> Zener gate to ground > Makes sense. I will ensure there's room for it, but for the initial > use I don't think I will add it. FETs can be surprisingly fragile, I'd hate to see you become a casualty of false economy Joe --=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 .