[Arm-netbook] Interchangeable screen

[Luke Kenneth Casson Leighton]

On Thu, Sep 17, 2015 at 4:12 PM, GaCuest <gacuest at gmail.com> wrote:

> Perhaps the best solution is to use neodymium magnets and screws. So any user can be safe with its screen. An advanced user who often changes the screen can always remove the screws and only use neodymium magnets.

 i think you'll find that even an advanced user may consider that they
could conceivably drop the unit.  if there was some sort of plastic
"lock" so that it was impossible for the screen module to drop out
without extreme force, then you would be fine.

 i think you should do some calculations to see what kind of strength
magnet would be needed to provide "anti-shock" level of attraction,
based on the weight of the components.  i see "150 G" shock-force on
hard drives, normally, so that i assume would be a good number to
start from.

 so now you would need to check the weight of the LCD plus its case
and PCB, then see what size neodymium magnet *at each corner* would be
sufficient to provide 150 gravities (10Nm) of attractive force.
that's 1500 Nm.   i think you'll find that the magnets needed are far
bigger than you imagine might be needed.

l.