The Arduino Uno board has three different options for receiving power:
- USB B port
- DC IN power socket
- VIN pin
Providing power via the USB B port in a standalone manner can be achieved via USB power hubs. These USB power hubs are also sometimes called USB power banks. The USB B port can receive 5 volts of power.
The DC IN power socket can receive power supply from external batteries as well as AC to DC wall adapters. The DC IN socket can receive 7-12 volts of power supply.
The VIN pin provides yet another option for receiving power from external power supplies. In this case, mostly, external batteries are used. Similarly, the VIN pin can also receive 7-12 volts of power.
As a caution, avoid an input voltage on the 5V pin, as the input voltage to the 5V pin will bypass the on-board voltage regulator and enter the main board circuit directly. This will...
