> Now [EE] was put in the subject for a reason... ;) You must
> not be aware of the paragon of efficiency that is the LM3909

550uA operating current isn't *that* efficient these days. A sleeping
12F will beat that by a factor of 500,000 !!! A sleeping 10F by a
factor of 5,000. Both have wake-up WDT, you can work out the
average LED-driving consumption

BTW, a discrete clone

http://home.cogeco.ca/~rpaisley4/LM3909.html

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