Just stumbled across this peeps

A guru might want to drop this guy a line…seems like one heck of a project and I think this would be good for a AtTiny13 for sure

Remindse a lot of that lamplighter project that fellow did over on CPF. Just a little light designed to last a very, very long time! I personally like the idea of a nifty little marker light that last year’s on a single battery.

Oh yeah, and with a little bit of clear nail polish for conformal coating…only thing that could have issues with humidity would be the cheap battery