[Date Prev][Date Next]
[Chronological]
[Thread]
[Top]
Re: [PSUBS-MAILIST] Joysticks
Here is a watertight and flexible keyboard
http://www.ece.utexas.edu/~sooter/blake.html
--- Lew Clayman <lew_clayman@yahoo.com> wrote:
> --- Paul B <paul_victor@hotmail.com> wrote:
> > I'm afraid a watertight laptop would cost too much, if it is
> possible at
> > all. You have over 80 keys on the keyboard to make watertight.
> And then you
> > have your com ports, lpt port, usb, pc card adapter and so on..
> >
> > And it's hard to make a waterproof case for it, because if
> there's not
> > enough air to cool it down, it may overheat, lock up and there
> goes your sub
> > control..
>
> It's certainly possible, if perhaps fiduciarily challenging...
> there are
> mil-spec computers and machines made for nasty industrial
> locations.
> Waterproofing the keyboard is pretty easy, you use a continous
> plastic
> membrane: the action on the keys is pretty poor, but it works, as
> do the
> even-lousier pressure-membrane keyboards, cheap variants on which
> are used on
> kiddie toys (may you never be so afflicted). Waterproofing the
> ports is no
> harder than waterproofing anything else that opens, you have a
> fitted cover
> with a rubber seal. I'm not sure how they handle heat dissipation,
> but I'm
> guessing conduction, not convection. Can't be that hard.
>
> Another "solution" is to use old, cheap, used machines. They might
> fail, but
> who cares? This of course only works if you have a manual control
> system that
> doesn't need the computer, or in some other use where the computer
> is
> inessential.
>
> > If I had to make the whole thing safe from electric shock, I
> would take a
> > laptop with external battery and make something like a watertight
> emergency
> > power off switch on the external battery itself. Maybe some sort
> of
> > automatic relay, activated by water?
>
> This should work, too.
>
> -L
>
> =====
> "It's never happened in the World Series competition, and it still
> hasn't."
> - Yogi Berra
> =====
>
> __________________________________________________
> Do You Yahoo!?
> Yahoo! GeoCities - quick and easy web site hosting, just
> $8.95/month.
> http://geocities.yahoo.com/ps/info1
__________________________________________________
Do You Yahoo!?
Yahoo! GeoCities - quick and easy web site hosting, just $8.95/month.
http://geocities.yahoo.com/ps/info1