Introduction - If you have any usage issues, please Google them yourself
Design Application Interface as a 16 binary encoder input port, and use the mouth as the 4 LED seven-segment display output, loop shows the encoding results. The use of logic switch plate 16 to enter a binary number, using seven-segment LED digital display control circuit board LED seven-segment display, circular display with the input binary number 16 corresponds to the four hexadecimal digits.