Idea for Openmoko application: Tide updates

[Matt]

> I'm thinking we need to make a generic expandable water proof (or at 
> least harsh conditions proof) case for the FR.
>
> For rapid prototyping, the very best interface would be USB. Future 
> applications might tie in at a more intimate level. At least for the 
> sensors mentioned so far the data rate is slow enough that our USB could 
> easily handle it.
>
> I'm envisioning something that looks like a Pelican case, one of the 
> smaller ones, with the guts of a FreeRunner and room for additional 
> hardware, perhaps an Arduino board, extra sensors, and an extra battery, 
> but still handheld.
>
> Some Pelican cases have a clear cover.
>
> I've wondered if there exist waterproof button activators that transmit 
> force via a magnet, like magnetic stirrers or pumps, so that there is no 
> hole in the case, no gaskets, and no place to leak (assuming the 
> original case is waterproof in the first place). Anyone know of such a 
> thing?
>
>   
I would have though the marine industry would have had prior need for 
water/salt resistant cases and switches, that's where I would look.

I know Jaycar [1] in Australia do have some project boxes which have a 
screw on lid, with a rubber seal.  I used one for a weather project, 
worked fine.

[1] http://www.jaycar.com.au