Multiple capacities on one board?

Hi. I’m trying to accomplish 3 things on one constructed control panel: midi controller, light controller, and LED digital sign. I have an Arduino UNO. How many Arduino’s would I need, or would one Mega work for three?


If the Uno has enough I/O pins it should be able to do the job. If you need more I/O pins use a Mega

If you need more help please post a link to the datasheets for all of the devices you want to connect to the Arduino.

And a good description of what you want to create would allow us to understand your questions in context.