Make sure to take a look at this amazing @AkosLukacs tutorial posted at hackster.io for the INA226 current and voltage measurement IC.
Simple and well explained step-by-step instructions enabling one to monitor energy consumption over time. Great for estimating usage to select the best battery for your Espruino project.
Even includes those *racy* 'under-the-covers' circuit layout images showing exactly how those titillating parts are joined to an Espruino MDBT42Q breakout board showing in full detail their wicked monitoring act! (tight in focus shots - not for the faint hearted)
Instructions, images, code, output and a live demo link. A complete tutorial project.
Well done Akos!
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