Hi,

  We 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.  On 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.

  What are the good ways to secure the modules and circuit board that
can sustain the vibrations?

-- Youda
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