Nit: The Nano power is wrong – Vin goes to a +5 V regulator, so you need a bit more than 5 V if you connect it to that pin (regulator drop out is ~1.2 V, Nano spec recommends 7-12 V). If you have regulated 5 V, connect it to the +5 V pin instead (or power via USB).
Nano schematics:
(LM1117 data sheet is here)