On Fri, Oct 22, 2010 at 1:01 AM, Youda He wrote= : > =A0We are developing a controller board that will be mounted on a > machine, the machine will vibrate (shake) heavily, but should not > exceed 3g. We have no control which direction it goes, so the circuit > board need to sustain vibration in all directions. =A0On top of that, > the environment is moist, we have some modules mounted with heavy > insulation inside. The insulation also added weight to the modules > (the modules are about the size of a deck of poker cards. places wide > side down to circuit. > > =A0What are the good ways to secure the modules and circuit board that > can sustain the vibrations? One thing I have seen on boards is holes around the modules to be secured, and cable ties used to secure the soldered modules to the board. As for the normal circuitry, maybe potting would help with vibration. Bill --=20 Psst...=A0 Hey, you... Buddy...=A0 Want a kitten?=A0 straycatblues.petfinde= r.org --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .