The ball switch consists of a little bouncy ball jumping around in a container connecting two contacts and thus acts like a switch. In contrary to a normal push button, which has very well defined states, the switching of a ball switch is more similar to a percussion shaker. There are two resting-positions which define a certain state of the switch: the board is lying flat on the table with its bottom facing the table: the switch is open the board is lying flat on the table with its top facing the table: the switch is closed. The voltage assigned to those states can be set with the two jumpers on the board. Refer to the printing on the board to identify the position that suits your needs. The ball switch can be used with the ANALOG IN and the DIGITAL IN of the Field Kit’s Sensor Interface.