First things first, let me state that I am a beginner with Arduino. I am trying to use an LCD and display characters to it, and I am using Adafruit's tutorial for it. The website is https://learn.adafruit.com/adafruit-arduino-lesson-11-lcd-displays-1?view=all . It uses a potentiometer, but when I turn it all the way counter-clockwise, it completely shuts off my Arduino. I don't know why this is happening, I would greatly appreciate some help.