Hi everyone,
I'm looking into building a project that uses a total of 10 7-segment displays to drive two independent indicators (000.00).
I wonder if it's possible to use two MAX7221 chips with one single Arduino UNO. I could only find examples with one single chip so I wonder there is a limitation.
As always, thanks a lot!!
No problem just use a diffrent pin for the chip enable and keep the other interface pins common.
Look on page 13 of the datasheet for an example of how to hook it up.
Keep in mind that you should have an equal number of digits on each of the chips to avoid noticeable brightness differences - have five digits on each rather that eight + two.
It looks like the use you are aiming for lends itself neatly to this method anyway, so don't mind me 
Thank you both!