> I don't understand what the author is trying to say with "wiring it in backwards" in the last paragraph. The author is just marveling at this novel / nonobvi

> I don't understand what the author is trying to say with "wiring it in backwards" in the last paragraph. The author is just marveling at this novel / nonobvious form factor, and referencing this bit as elegant / cool / new: > The + and – markings on the PCB indicates (this is important, read carefully) the positive and negative poles of the battery we are pretending the AAduino is. [...] Also note! If you want to power the AAduino from a bench power supply, connect the power supply’s black negative lead to the + marking and the red positive lead to the – marking. Typically your electronics have polarity labelings based on which end of the battery they'd connect to - e.g. you'd have a red wire going from the positive terminal of the battery to the positive terminal of the device being powered, which this paragraph is warning is not correct for the AAduino because it's labeled as a battery would be instead.