介绍HH204步进电机驱动电路在复费率计度器上的应用，给出了硬件电路和驱动程序。
This paper introduces the application of HH204 stepping motor's driver on multi-rate register, presents a circuit and driver program.
本文介绍一种全电子式复费率电度表的设计方案，给出了其工作原理、硬件配置和软件设计。
In this paper, the design project of a new type electronic time sharing Watt hour meter is presents.
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