what is the uno's amperage max? will it be okay if i power it with 3A?
The Uno will draw what it needs for current, in the tens of mA range to maybe 500mA if you have a lot of things connected. 3A will be fine for a supply, plenty of extra capacity.
what is the uno's amperage max? will it be okay if i power it with 3A?
The Uno will draw what it needs for current, in the tens of mA range to maybe 500mA if you have a lot of things connected. 3A will be fine for a supply, plenty of extra capacity.