Lipo Battery Monitor On Nano 33 BLE Sense - Arduino Forum

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Official Hardware Nano Family Nano 33 BLE Sense matt_lee_smith January 15, 2020, 12:34am 1 Hello All,This is probably a simple "no" answer but I just wanted to double-check.The Nano 33s can only handle input voltages of 3.3v so I am assuming that the BLE battery monitor example in the Arduino BLE library must be for batteries that they can cope with, therefore a lipo such as a 18650 which can range from 2.5v to 4.2, can't be placed monitored by the analog pins without a voltage divider, logic shifter or 3rd party hardware.ThanksMatt Grumpy_Mike January 15, 2020, 3:19am 2

so I am assuming that the BLE battery monitor example in the Arduino BLE library must be for batteries that they can cope with, therefore a lipo such as a 18650 which can range from 2.5v to 4.2, can't be placed monitored by the analog pins without a voltage divider

Correct.

logic shifter

No, that will give you no useful information as the output voltage will not change with input voltage.Also the battery readings are treated in a very simplistic way. Adafruit have a battery monitoring circuit ( potential divider from the battery input connected to an analogue input pin ) on their boards that have a much better way of working out the percentage change. See https://forums.adafruit.com/viewtopic.php?f=57&t=157600&p=787512#p787512 matt_lee_smith January 15, 2020, 11:41am 3 Thanks Grumpy_Mike.Looks like I will have to get something like the Adafruit setup or a Sparkfun Fuel Gauge! Related topics

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