16x2 lcd with alphanumeric keypad code Hardware requirements 4x4 keypad 16x2 lcd One 80s51 0r 80c51 Oscillator to provide necessary clock frequency to micro controller. A potentiometer for lcd contrast. First of all never fo

16x2 lcd with alphanumeric keypad code Hardware requirements 4x4 keypad 16x2 lcd One 80s51 0r 80c51 Oscillator to provide necessary clock frequency to micro controller. A potentiometer for lcd contrast. First of all never fo

16x2 lcd with alphanumeric keypad code Hardware requirements 4x4 keypad 16x2 lcd One 80s51 0r 80c51 Oscillator to provide necessary clock frequency to micro controller. A potentiometer for lcd contrast. First of all never fo

利用排成 8 字形的七段 LED，简单显示数字0 到 9(Using the seven segment LED arranged in 8 characters, it simply displays the number 0 to 9.)