Introduction - If you have any usage issues, please Google them yourself
Introduced in 8051 (CMOS low-power) microcontroller as the core element, and with a micro-power LED display and serial to parallel conversion chips and other low-power integrated chip, a combination stopwatch system. Compared with ordinary stopwatch, timer with the pause function in addition, increases from an initial value setting function. Its outstanding advantages: small, off the job, lowest power, to use the battery as a power source, a compact hardware architecture, software design is simple and flexible.