Is it smart to use a 12vDC / 2A regulated power supply for an Arduino Uno? I have heard that the voltage regulator on the Arduino may overheat.
My project is a 4 digit (seven segment display). I am using a max7219,source driver and sink drivers to deliver the external 12v power supply to my display (Segments require 60ma/9V).
Therefore I beleive the arduino is only using 5v to power the max 7219 and small amps to open the source drive outputs. Everything is working GREAT right now. But I am finalizing the project and want to only have one power source to my project. I have been powering the Arduino by USB until this point. I do want to utilize the 12v/dc regulated power to power the Arduino.
I was wondering if I should regulate the 12v source to 7volts before plugging into Arduino? Any thoughts? I would hate to overheat my Arduino (I am new to this and am proud of how much I have learned in 6 months.)