I'm planning to power my arduino with a lipo battery and I'd like to have some sort of warning as to when the lipo is getting low. It's going to be 2S (8.4V charged, 7.4V dead). So I want to , say, set a delay(10000) to run once when the voltage has dropped below 7.4. Is there some sort of voltage…

Detecting the voltage input to the arduino.

system October 6, 2012, 4:51pm 3

So something like this with the positive also going to the main power supply?

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