Cheap ckt. potting options

[John Popelish]

I imagine they don't recommend powdered beryllia. ;-)

Probably not. Especially when the thin layers of low
thermal conductivity epoxy between the beryllia particles
makes their advantage pretty small, compared to the
negatives. A good substitute would be aluminum granules or
needles that had been oxidized to insulate them at the
circuit's working voltage.

 

[Michael Black]

I imagine they don't recommend powdered beryllia. ;-)

That's an interesting path to take.

Don't worry so much about keeping the circuit covered up, just
kill whoever tries to remove the potting compound.

Michael

 

[Harry Dellamano]

I am manufacturing a small run of devices which I would like to
protect from duplication. They consist of a 50x50mm PCB in a hand-held
plastic case with batteries. I plan to partition the case and pour in
a self-curing potting agent

Dedicated two-part potting epoxy is relatively expensive. Can anyone
suggest a few hardware variety alternatives, in order of preference?

Thank you,

Mark Hansen

If the market for your device is small then there is no need for potting
protection. There is probably at least 10 people in this group that could
design it better without even looking into your device. In a large market
situation they would be hired to redesign a better device. Forget
protection, think cost, service and product improvements to stay ahead of
the competion.
Cheers,
Harry