利用单片机89s52测试频率，还有用笔段式液晶显示出来，里面包含了笔段式液晶的显示时序程序。-Frequency of use Microcontroller 89s52 test, there is a pen-stage liquid crystal display them, which contains the pen-stage procedures for liquid crystal display timing.

单片机（Mega88pa）直驱段式液晶LCD.原代码+原理图+LCD资料。绝对原创。资料详细。有不明白的，请发我邮箱：litaocuit@126.com-MCU （Mega88PA）drive LCD

m62429音量数字电位器，c51驱动显示在HT1621段式液晶上。-m62429 volume digital potentiometer, c51-driven liquid crystal display segment in HT1621.