Addafruit feather M0 logger battery

Projects Programming
1

Is there any way of using the regulator to shut off the battery please.
Low battery warning bleep only works if i am there to hear it.
Couple of times i have measured 3 V of a lithium battery and am concerned that i may damage the battery otherwise.

2

I do not think you can, however you can implement a latching function using a MOSFET that will use almost zero standby current.

3

Maybe similar to:
https://create.arduino.cc/projecthub/jmjulien/lipo-low-voltage-cutoff-729ae8

Googling shows a few circuits.

I buy those cheap 1-cell lithium 5V cellphone units, maybe $4 to $5 at overstock stores and that is a complete solution.

4

Thanks, unfortunately that board is bigger than my (150 maH) battery.
I was hoping to turn off the regulator using external hardware but this depends upon the feather pullup resistors being set and active when the arduino is de powered.

Also i am unclear what the EN pin does, does it shut off the output or just the regulation.

5

I'm sure you'd get a quick answer on Adafruit's forum... heck, you paid for tech support in their prices!

6

Thanks, i forgot which forum i was on.

7

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