I have an Arduino UNO that I plugged into a 12V 3A supply. It connects to an Adafruit motorshield that runs two steppers and a relay board with 4 relays. With the jack plugged I seem to get fluctuating power after about five minutes of use. However when I plug the USB in everything works fine. At fi…

Arduino Shutting off When Plugged into Power Jack

sdresche April 20, 2018, 10:53pm 3

So I'm just using the adafruit motorshield, which I believe pulls from the 5V, should I just connect it to Vin instead?

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