I dont have a 100mH but instead found on a dead printer pcb board from lexmark a 330microhenry and a 680microhenry.
Has anybody ever used such inductor in Arduino boards?
I know about the filtering and such but was curious to ask what would happen if it was used instead of the 100μH.
How many ways are there to say "330uH does not equal 100uF"
It's not like substituting a yellow shirt for a blue shirt. It's electronics. It's either 100uH or it's not.
Maybe a better question would be "Will a Pi Filter work better with more inductance ?
Short answer: yes.
Or you could ask What is the ACC pin for ?
(see Crossroads Reply#1)
AVCC is power for the analog circuitry (Port C pins and internal A/D) in the Atmega.
L1 is an inductor intended to make cleaner analog power.
That is the old serial Arduino too. Newer ones have USB interface instead, with AVCC connected to VCC.