Hello, firstly I am a complete novice with an idea that may or may not be possible, hence I signed up to the forum for help. I would like build a circuit which will light up a green light if, at the moment pressure is released from a pressure sensor, the height of two points A and B are level. The best way I can explain it is imagine you are holding a ball in each hand and at the same time you have your foot on a pressure sensor. When you release your foot from the sensor a green light will illuminate if the balls in each hand are level with each other. It will illuminate red if the balls are not level.