Connecting multiple ATmega328p's on same power rail

Using Arduino Project Guidance
1

When connecting multiple ATmega's on the same voltage rail would it be advisable to be using resistors to make sure the current is split evenly across the 2 ATmega's.

Thanks

2

No. Each 328 will pull the current that it needs.

3

You need individual VCC and AVCC 100nf bypass capacitors for each processor - as close as physically possible to the chips. 2 x 328’s = 4 caps, minimum.

Add a 10 to 100uf (minimum) electrolytic cap for VCC where it enters the board as well.

4