Touch screens on appliances are becoming very common. When they are activated by pressure, visually impaired people are able to put raised dots in the correct spots to know where to push for the action they want. However touch screens that are activated by touch (capacitance) cause problems because by feeling around for the locator dots, other buttons end up being pushed. Your task is to design a system that will allow a visually impaired person to accurately push buttons on a capacitive touch screen of an appliance.