Hi everyone, I'm building a custom arduino 2560. I saw the diagram and noticed that there are 5 unrelated resistances. On the scheme they are not connected while in the original pcb they are connected. How is it possible?!
The resistances in question are: RN1D, RN1A, RN3C, RN2C and RN2B
I need the wiring diagram so I copy the mega arduino and add pins etc. Can anyone help me? Does anyone have a complete scheme?
These are the unused resistors on the resistor networks. Even though they didn't need all the resistors, it still works out better from a manufacturing standpoint to use the resistor networks than individual resistors.
Check out the Eagle files for the full details. You can download them from the "Documentation" tab of the product page: