此频率计是用单片机89C51和几块数字电路几个三极管，和一个微波集成电路构成。可测量频率最高为2G！分辨力为1HZ！-This frequency meter is used 89C51 microcontroller and a few pieces of several transistor digital circuit, and a microwave integrated circuit form. Measure the frequency of up to 2G! Resoluti

此为晶体管计时器。功能有顺计时和倒计时。-This is the transistor timer. Function is timing and countdown.

晶体管特性曲线测试的源码，可测试如9013晶体管的特性曲线-Transistor characteristic curve test source code, can be tested as 9013 transistor characteristic curve