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.
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.
Quote from: fungus on Feb 28, 2013, 07:09 pmif you say "ow!" then you need to reduce the load.Or lower the input voltage. Higher input voltage = more voltage to drop = more heat.BTW, 12V is listed as the upper recommended supply voltage in the Uno specs.
if you say "ow!" then you need to reduce the load.
Although, I just looked at my Uno R3 and it uses an NCP1117 regulator, which automatically shuts down if it gets too hot. According to the datasheet, that happens around 175°C.