1602是字符型液晶，它是16*2的显示的。1602字符型LCD通常有14条引脚线或16条引脚线的LCD，多出来的2条线是背光电源线VCC(15脚)和地线GND(16脚)，其控制原理与14脚的LCD完全一样。-1602 is the character type LCD, it is 16* 2 shows. 1602 character LCD usually have 14 pins in 16 pin line or LCD, extra 2 lines is backlit power cord VCC GND (15 feet) and ground (16 feet) and its control principle and the LCD of the 14 feet are exactly the same.