1. An apparatus, comprising: a first plurality of sensor elements coupled together; a second plurality of sensor elements coupled together independently of the first plurality of sensor elements; a third plurality of sensor elements coupled together independently of the first and second pluralities of sensor elements, wherein the sensor elements of the first, second, and third pluralities of sensor elements are interspersed and disposed in a repetitive sequence along a movement path of a conductive object; a first capacitive sensor coupled to the first plurality of sensor elements; a second capacitive sensor coupled to the second plurality of sensor elements; a third capacitive sensor coupled to the third plurality of sensor elements; and a sequence detector coupled to the first, second, and third capacitive sensors to detect a conductive sequence of a movement of the conductive object in proximity to at least some of the first, second, and third pluralities of sensor elements.