I am a total newbie on Arduino, but I know I need the RobotDyn Mega 2560 PRO MINI as I need 3 hardware UARTs. The problem is that I don't understand which version I need.
They are available in a 3.3V version and a 5V version.
I will use this on an Ebike, and it will be powered by a 5V output on the bike.
At first I thought that I should get the 5V version of the board.
But looking at the specs it says:
For 3.3V = 5~9V (peak 18V)
For 5V = 7~9V (peak 18V)
Does this mean I should get the 3.3V version as the power in is between 5-9V?
Or have I misunderstood anything?
I will either get this version:
Or this version:
Both are available in 3.3V and 5V versions.