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Tap off 12 V? Answered

Wouldn't it be easier to tap off 12 V from one off the batteries instead off using a 24-12 V converter?

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randofo

Best Answer 8 months ago

That is another way to do it. I choose to do it this way because I feel like using a converter is better form and is easier to explain.

I would advise against this as it develops a bad habit. What you will effectively be doing is discharging one of your batteries faster than the other. For now, this is trivial because you are only running an arduino which has a tiny current draw; however, I have seen people do this with high current lights and stereo systems and be confused why one of their new expensive car batteries is dead.