How about making a fat place in an air hose, and putting in
a muffin fan wired to work as a generator?

alice

> I«m working on a project where the customer don«t want electric connection.
> And no batteries needing to charge, switch or anything like that either.
> Too dark/small/dusty to use solar power.
>
> It«s a kind of moving hose connected pressure air driven tool, that I«m going to automate and improve somewhat.
> Current verison do have air-logic, but a microcontroller based will have more facilities.
>
> So, I got plenty of air, standard pressure 7bar, filtered, dehumidized, oil free.
>
> My power requirement is about 12V, 1W.
>
> Lifetime also is an issue as this is industrial, and noise must not be too high.
> Cost is always an issue...
> Maximum alowed airelectric generator size is 0,5 litre.
>
> I have sketched of a number of solutions, but nu really good.
> Unfortunately i have no rotating part on that tool, (just cylinders) and also the sensors need power when tool is at rest.
>
> Probably someone have been thinking about this before, and a good place to ask is this list  :)
>
> So...??
>
> Thanks in advance.
>
> /Morgan
> Morgan Olsson                   morgans.rt@telia.com
> Morgans Reglerteknik, HŠllekŒs, 277 35 KIVIK, SWEDEN
>      tel +46(0)414-446620, fax +46(0)414-672324