Mini underwater robot (casing ideas?)
This idea is in the preliminary stage at the moment, I have a good level of understanding of all idea's implementation but I need some help with the casing (and battery).
Without giving too much away (wouldnât want to spoil the instructable surprise now, would we?!); basically itâs an underwater BEAM bot, itâs mainly static but it has some "flailing" arms that can move around in an interesting fashion. Said arms can wiggle in two dimensions (above and below the plane at which they are detached - think elbow that can bend back and forwards) and are composed of a levered magnet/coil combo. The entire thing will probably have three arms, all on the same plane.
I also need a small rechargeable/replaceable power supply, emphasis on small (the project needs to be somewhere near neutrally buoyant), and some way of recharging/replacing it. Any ideas would be most welcome.
Now, since Iâm using electronics underwater I want to make sure water cannot get in; problem is I donât know how. I have had some ideas about some sort of thin sealed plastic, i.e. two pieces of plastic cut to shape and sealed around the edges, but then charging becomes an issue. Plastic would otherwise be ideal.
Please keep in mind that Iâm a student and cannot afford anything more expensive than a good lunch. Finally, would this make good instructable material? Iâm hoping to have a design no more complex than a basic beam bot, as it is at the moment the part count is very low...