After my previous article, Olimex people pointed out that their Olimexino-328 board is able to use much less than 4mA if powered through the battery connector.
So, I went and tested their claims and they were correct, indeed. When running Olimexino-328 at 3.3V using battery connector, power down mode …
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As I got my INA219 sensor working, the next logical step was to actually find out how you can save some power with Arduinos.
Sparkfun provides a nice article about the subject and atmega328p datasheet is also an useful information source.
To save power, I basically did following things:
To optimize the power usage of my Arduino devices, I first needed to measure the power usage.
I could have done it traditionally with multimeter, but then I found Adafruit's INA219 sensor breakout board.
Adafruit also has nice tutorial for the sensor (which I actually bought from oomlout.co.uk …
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