> I believe the greatest risk is if you drip some gas, then drop > your telephone off your pocket in the spilled gas on the > concrete. There might be sparks in the battery connection then, > and also the battery or thelephone could short-circuit some way. > Lying in the gas it is easy to ignite it. Actually, amazingly enough, one of my certifiable friends is so confident in the safety of gasoline that he actually extinguished his cigarette in it! I've seen it done, and in disbelief, no explosion, and no flame. So if the heat of the cigarette is not hot enough to ignite gasoline, would the spark from a dropped cell phone? Getting back on topic, is there an application note or some compiled data on the PIC's RF immunity. Our PCB designer designed a board where we integrated a 16C73A with some Linx RF modules. The transmitter module was placed directly beside the PIC with the trace to the antenna looping through the PIC pins and underneath it. This was causing some definite problems, and would only work properly when we re-routed the antenna trace. So from my findings, with a 900 Mhz - 0 dBm transmission, RF does effect the PIC. Craig