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目前,国内大规模集成电路刚刚进入试制、生产阶段,元器件价格比较昂贵。例如用CMOS集成电路做一个八位数字的可逆十进制计数器,需用500元,而这种计数功能,只是简易袖珍计算器20个功能中的一个。用简易计算器通过简单的改装就可以用作这种计数器,只需花70元。如果再经过一定的改装,加上必要的接口电路,不但可以做成自动的运算器、逻辑控制电路(如“预置数发讯”)和数字打印机,还可作为一些仪器、仪表的终端显示等等。袖珍计算器具有成本低、体积小、功耗小、功能多、准确可靠、显示位数多(一般8～12位)、自校简单、操作方便、改装线路后不影响原计算器的功能等特点。目前国内数字集成电路还不普及,有一定的推广价值。本文主要介绍计算器在计数方面的应用。
At present, the domestic large-scale integrated circuit has just entered trial production, production stage, component prices are more expensive. For example, with CMOS integrated circuits to make an eight-digit reversible decimal counter, need 500 yuan, and this counting function, just one of the 20 functions Pocket calculator. With a simple calculator can be used as a simple modification of this counter, only spent 70 yuan. If through a certain modification, coupled with the necessary interface circuit, not only can be made into an automatic calculator, logic control circuit (such as “preset number”) and digital printers, but also as a number of instruments, meters Terminal display and so on. Pocket calculator with low cost, small size, small power consumption, multi-function, accurate and reliable, the median display more (usually 8 to 12), from the school simple, easy to operate, after modification of the line does not affect the original calculator function Features. At present, the domestic digital integrated circuit is still not popular, there is a certain promotional value. This article mainly introduces the application of calculator in counting.