Arduino nano and IO shield - really basic stuff; just how to plug in power to IO - General Electronics - Arduino Forum
3 Different ways to power up the Arduino nano
Am I doing something wrong here? I thought that "VIN" pins served the same function as USB connections to a computer (power-wise that is), but I pumped 3.3V into my Nano 33
Nano fried!!! - General Electronics - Arduino Forum
Arduino® Nano - Pinout -
Maximum Voltage Arduino Nano Can Take
Arduino Nano - Seattle Makers
Arduino nano blows up with 12v used for VIN - General Electronics - Arduino Forum