A potentiometer, or "pot" for short, is a control knob. It's the same type of control you'd use to change volume,dim a lamp, etc.
A potentiometer changes resistance as it is turned. By using it as a "voltage divider", the Arduino can sense the position of the knob, and use that value to control whatever you wish.
In this example we are going to Turn ON and OFF sequence of 12 LEDs depending upon the position of the knob of potentiometer.As we turn potentiometer from initial position to final position,12 LEDs will glow one by one depending to value of potentiometer.If we turn knob in reverse direction then LEDs will turn OFF one by one depending upon the value of potentiometer
Once we upload the code in arduino,you need to Rotate the potentiometer to Sweep the leds in circular motion.Use the led ring to display the temperature or light values in a dynamic way.
No more connecting leds to breadboard and messy wiring.With the idIoTware shield the sky's the limit.