共阴极数码管数字显示，控制器设有多种控制方式， 可实现手动控制画图翻转和电动定时自动翻转， 并可配合传感器模块实现光控、声控、热释红外控制等试验-Common cathode LED digital display, the controller features a variety of control, manual control can be achieved drawing and electric timer automatically flip flip, and with