ATtiny in a bottle

Using Arduino Project Guidance
11

Winston:

Far-seeker:

Chagrin:
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 :wink:

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...:wink: