Introduction - If you have any usage issues, please Google them yourself
The design of a simple digital voltage meter. Requirements can be 2 input voltage measurement in the range of 0~5V value, which is displayed on a display.
1.Measure the minimum resolution of 1 digital voltage meter 0.02V
2.4 digit display, a display of analog channel number, three digit display voltage (0.00~5.00V)
3.the use of keys to the single path channel display
4.use the button to switch the 2 road cycling display and single channel display.