So I am working on a project with a 3.3v arduino that I want to power with AA batteries. I would prefer to use two AA batteries with a step-up regulator to get to 3.3v, but I am using a BT module (RN-42-HID) that requires 3.3v with a +/- 0.3v tolerance. Should I go for three batteries with a step-d…

Step-up or Step-down regulators for 3.3v

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