It sounds to me like you need to ascertain the source of the noise when the= switch is slammed over, and modify the switch with some form of rubber sto= p or other mechanical noise absorber. --=20 Scanned by iCritical. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .