...It is powered by an 18650 and I put it all in a medicine bottle.
A description of it's construction, as simple as it is, is at an instructable here: https://www.instructables.com/id/Did-We-Feed-the-Pets/
Current draw:
Awake: 5 mA
Sleeping: 0.13 uA (!)
Free Electricity Network Drawing Interface is a free graphical user interface used
to draw electrical systems. It will be used by a lot of kind of simulations engines
like loadflow or short-circuit calculations, stability and transient simulations.
DiscoS is a small Java program that recognizes characters or words based on symbols drawn on a virtual sketchpad.<BR>
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Keywords: recognition, Java, character, sketch, draw, artifical, intelligence