Power Arduino nano with the same power supply as the LED's with DC-Stepdown

[lightsoundtech]

Hi,

in general, this should work if you connect the positive output of the step down module to the 5V pin of the Arduino. (in case the regulator is set to 5V) .

But actually there is a voltage regulator built in the Arduino board which should be able to handle 7 - 12V on the VIN pin....

Actual VIN voltage limit(Nano)

12.6volt on V-in should still be ok for a classic Nano, but you're in the danger zone. At that voltage you can't power anything from any pin without the chance of overheating the onboard 5volt regulator. Although the IMU and one LED could just be ok. Powering the BT module from the 5volt pin almost certainly will get you into trouble. It's wise to get a buck converter to drop that 12.6volt to 5volt, and power the Nano on the 5volt pin. The BT module can also be powered from that 5volt buck co…