two work fine on my current robot. I am to up the ante by using my arduino on a larger system which may require as much as 8 on my offroading one. I will also have 2 temperature sensors to monitor my mootor driver temp and switch the fan on when needed.
I am thinking of putting a 5v regulator with a common ground to power up my sensors. any thoughts? i have a 5v 1amp regulator gathering dust.