采用普通集成电路制作轻触式步进调整控制电路时，外围电路相对较复杂；本文介绍用单片机AT89C2051来编程制作轻触式步进调整控制电路，则外围电路较简单，微型继电器的驱动电路容易制作，实际运行效果也不错。适合初学者仿制。-The production of integrated circuits using ordinary touch-step adjustment control circuit, the peripheral circuits are relatively complex　This article describes the program used to produce single-chip AT89C2051 touch-step adjustment control circuit, the relatively simple peripheral circuits, micro-relay easy production of the drive circuit, the actual operation of the effect is not bad. Suitable for beginners imitation.