Hi all!
I have a quick question. Can I do analogRead() on an Atmega32u4 digital pin? One that is still attached to the ADC? Like D8 which is ADC11?
Here is an Atmega32u4 pinout diagram:
Thanks in advance!
Yes: IF you use a standard board definition, like Leonardo
Ok, thank you.
I am trying to attach 8 buttons to that one pin on an atmega32u4. Any suggestions on how to do that? I was thinking attach a different size resistor from one side of each button to +5V, and all the second sides of the buttons attached together and to the digital pin. That way you could read a different voltage for each different button that is pressed. FYI, I don't need two buttons to be pressed at one time.
You will also need a resistor between the pin and Ground so the two resistors act as a voltage divider on the 5V supply. I would pick a 10k for the pull-down resistor and values between 1k and about 20k for the pull-up resistors.
Got it. Thanks @johnwasser and @mrburnette!
I would turn the schematic so that +5 is along the top and Ground is along the bottom, as is traditional. 
No need to connect all of the Terminal 4's on the buttons since they are connected to Terminal 3's which are all connected.