I've asked another question in electronics about what to use to compare 2 input voltages, the answer was to use comparators.
Digging around a bit, turns out most of the comparators outputs are pull-up, which makes it quite difficult to translate (probably due lack of general electronics knowledge, self-learned) and I'm not able to distinguish from maker's PDFs which comparators have pull-up or pull-down outputs. I've figured PD comparators illustrate in PDF a resistor right after the output... but many illustrations I've seen doesn't clarify PD / PU, or I'm just missig that.
But my question is, are there any PD comparators (well known) where it's output can be connected to the digital pins or arduino (while those are defined as INPUT mode)?
I appreciate any guidance on this topic.
Just a side note, I want to switch on a led, when ever external source is at 12V and turn that same led off when it's below 11.5V...