Use AT89S51 single chip and real-time clock integrated circuit DS1643, designed an electronic clock system, realized the date, time display and reported time.
利用AT 89s51单片机及实时时钟集成电路ds1643，设计了一个电子钟系统，实现了日期、时间显示及报时功能。
Explicated the structure and principle of work of ultrasonic launching and receiving circuit, presented the program frame and part program of the date processing.
并对超声波发射接收电路的硬件结构和工作原理做了较详细的说明，给出了数据处理系统程序框图和部分程序。
This article discussed the relationship of the inductive current, the lever of electromagnetic field, and the loop circuit impedance by some test date concisely.
文章通过理论分析和试验数据，对感应电流与电磁场幅度及环路阻抗的关系进行了探讨。
Hydraulic circuit controlled by proportional valve. The clamping and injection stroke are controlled by potentiometer. Microprocessor can save up to 46 sets of mould date.
油压回路采用比例式电磁阀(全比例)控制，电控采用微电脑控制射出、关模，行程采用数位尺控制，能记忆46组模具资料。
Hydraulic circuit controlled by proportional valve. The clamping and injection stroke are controlled by potentiometer. Microprocessor can save up to 46 sets of mould date.
油压回路采用比例式电磁阀(全比例)控制，电控采用微电脑控制射出、关模，行程采用数位尺控制，能记忆46组模具资料。
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