电风扇控制电路及其源代码，实现功能调速，定时功能。汇编语言编写。,Fan control circuit and the source code to achieve functional speed, timing functions. Written in assembly language.

秒表源代码。计时精确到0.01秒，计时led输出。方便实用-Stopwatch source code. Timing accurate to 0.01 seconds, timing led output. Convenient and practical