MAX7219 problem

Using Arduino Displays
60

I have said it in post after post, most recently in #49.

If you do not believe me, well, we await #99. :roll_eyes:

adwsystems:
So I will write this again.
You can only use one of the three following connections:

  1. Barrel Jack (for 7-12V power supplies)
  2. Vin (for 7-12V power supplies)
  3. 5V (for 5V power supply)
    PICK ONE and ONLY ONE.

I really wish you would not confuse the poor fellow with such unhelpful nonsense! :astonished: