Re: [Electronics_101] Ruggedized components?
- Proper case design will make for a rugged product more than rugged parts.
Leon Robinson K5JLR
>________________________________[Non-text portions of this message have been removed]
> From: normnet2003 <normnet2@...>
>Sent: Tuesday, August 20, 2013 8:58 PM
>Subject: [Electronics_101] Ruggedized components?
>Are their suppliers which offer ruggedized components for use in portable devices? Most of the devices I assemble eventually are dropped and broken due to component failure.
- When you say "ruggedized", are you talking about fully screened parts as
used in military and space? Or are you talking about general shock
abuse. If it is the prior, yes, there are parts but cost is high and
many commercial products cannot afford the pricing.
If you are talking about the later, then it becomes how the part is
assembled. Some key points:
1. Layout of parts on the board to minimize shock stress and
prevent the parts from coming off. Think about what is shot out of a
cannon / gun. Here if the parts are not in the proper orientation the
parts will break away from the solder joint.
2. Pot the entire assembly, or just the boards. Though it makes
repair difficult, if not impossible (depending on the potting), it does
help keep all the parts on the board.
DDK Interactive Consulting Services
On 8/20/2013 6:58 PM, normnet2003 wrote:
> Are their suppliers which offer ruggedized components for use in
> portable devices? Most of the devices I assemble eventually are
> dropped and broken due to component failure.
[Non-text portions of this message have been removed]
- I was also going to suggest adding a potting compound.
In addition to simply keeping the parts on the board, it can act as a
shock absorber. If all of your failures are due to mechanical shock,
I would definitely consider it.
"Mil spec" includes a whole wide range of things, not all at the same
time for every part. AFAIK, just being Mil spec doesn't mean that it
passes the same requirements as any other Mil spec part. It depends
on the use.