On Sat, Jul 24, 2010 at 8:49 AM, Michael Watterson wrot= e: > Varnish/seal everything. What the army in WWII called "tropicalised". I like this idea. > Also only have probes and moisture/heat source in the high RH > environment. Put the electronics elsewhere. Some components don't like > fungi. Some fungi may secrete liquids that attack wiring or even insulati= on? For this project, it would be impractical to separate the PCB and sensory equipment. Also, I don't need to worry about fungal invasion. These fungi play nicely. Humidity is the only thing I'm worried about. > Crystal is more concerned about temperature. But unless you are doing > very accurate timing and the crystal has a trimming capacitor to fine > tune frequency, it's unlikely to matter. Thanks, it should be fine then. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .