Introduction - If you have any usage issues, please Google them yourself
The use of single-chip realization of multi channel data acquisition system A/D converter control. It has the following functions: 1., basic functions (1) the data collected are 0-5V voltage signals; (2) select any channel's data display or rotate display by buttons; (3) set the alarm upper and lower limits. 2. extended functions, such as music ringtones, communication functions, and so on.