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Topic: ATtiny in a bottle (Read 3 times) previous topic - next topic


As he mentions you could run an ATTiny for a year on a couple AA batteries (2200mah batteries / .2ma = 458 days) and even the smallest solar cell would power it "forever".  Not sure how you get a solar cell in a bottle though ;)

Roll it up and stick it down the neck...

Or simply use a wide mouth PET plastic jar as show in my concept jpg linked to above.  That would make the unit very easy to build as it provides easy access to the interior of the seagoing vessel.

Well sure if you want to do things the easy way...;)


Discarded plastic is a real problem. Here is a project where there are so many flip-flops washing up on an Indian Ocean beach people can specialise in re-cycling them!!! Not only does that give a feel for the scale of the waste problem but the level of poverty in many areas;

I don't know about you but every beach/coast I go to is plagued by this problem.
How does so much waste end up in the sea?


Have you heard about the concentration in the Pacific Ocean?

My friend has been studying it for years.  Want to know the truth about it?  Check out the images online.
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How does so much waste end up in the sea?

It is because -average- consensus awareness of trash has the garbage pail emptying into a black hole. Same way that water comes from faucets and disappears down another black hole, and electric just comes out of walls.
And whenever something is different there is upset until put back the same but don't remind people of what they don't want to know. The issue is solved for the majority through ignorance and denial, it is not enough to change an election so only gets lip service.

Hey, pollution's been an issue for me since 1969. I'm used to being in the minority.
Someone should give rich kids 'Jersey Beach Whistles' just to slap their parents heads.
I find it harder to express logic in English than in Code.
Sometimes an example says more than many times as many words.


Well then I guess this project should probably use a relatively thick-walled glass bottle or jar, especially non-colored glass.  While there is still an issue of some creature accidentally eating it, a glass vessel if broken up would eventually be turned into small pieces of glass.  Common non-colored glass is almost three quarters silica (SiO2), similar to a lot of the natural sands, along with some sodium oxide (Na2O) and lime (CaO).  So even though it probably won't break chemically, if it does there's nothing involved that would be innately poisonous in small amounts.  Also unlike polymers, even small piece of glass wouldn't stay suspended in the water column indefinitely.  Instead it will act much like small rocks or sand, depending upon the size.

I'm certainly not in favor of adding to the oceanic pollution problem, but if this device is never found again it looks like a glass container would pose less long-term problems than a plastic one.  Of course that's not taking into account whatever is inside the container...

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