Do you need AREF? Does it make sense if the analog reference is at 5V?
Thank you for the info. Makes sense just never used that header on an Uno or Mega. Must be connected internally on the board.
If you need the internal ADC, yes.
This is what I thought but wanted to make sure.
Wanted to know so I can use small components and SMDs at that.
Depends on the used components. Usually, it's a combination of ceramic and electrolytic capacitors.
What do you mean a combination of ceramic and electrolytic? I have seen people use electrolytic on the input and output to help smooth it out. This is the part i plan on using for the 5v regulator. https://www.mouser.com/ProductDetail/511-L7805CV
I don't understand this sentence. Is that a question? Should it be a description of your application?
Sorry about that. I was a little tired when writing the post. I meant to say I will be using a couple of Light-dependent resistors. didn't know if that would make a the on the AREF question.