> This is definitely [PIC] and [EE] related! The first > time that I read the many, many, many, data sheets and > application notes in Microchips pretty cool old > "Embedded Controller Handbook" (1995, or so, for me) > I was warned about ESD entering port pins . . . > > After seeing this, I take the warnings much more > seriously. I have a TO-92 case LM2931 voltage regulator that is cracked and burned from my touching an unrelated piece of the circuit and discharging an unfelt charge into the system. I show it to unbelievers. Many of them still refuse to believe, but what can you do? Mike H. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist