I have an arduino mega 2560, and here is a diagram of what I am trying to do. I am a little confused as the difference between all the inputs.
I am using a trellis board from adafruit, so I know that takes up one Analog input and Pin 20 and 21, but are the others “open” to use as inputs or outputs?
I hope pdfs expains it.
Basically I have 25 LED push button inputs, 10 which are both input and output, 7 regular mini push buttons and 16 Analog inputs.
Can this be done?