On Sat, Jul 24, 2010 at 8:39 AM, Olin Lathrop w= rote: > V G wrote: >> I am concerned that water from the air may condense on the PCBs and >> cause problems (such as undesirably conducting electricity, and so >> on). Should I be worried about this? > > Yes. > >> If so, what can I do about it? > > Put only the sensors in the chamber with the electronics in the normal ro= om > environment. =A0That's what wires are for. That would not be practical. The chambers themselves are quite large, and the room that the chambers are stored in is itself quite humid. It would not be practical to run long wires into the chambers (especially those for SPI, I2C, and 1-wire communications intended for short distances). Would coating the PCB and electronics with some sort of spray help to prevent problems caused by water? Any other ideas? --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .