40*4字符液晶模块，该屏为大尺寸的字符液晶，内置KS0066及其兼容控制器，显示效果为黄绿底黑字或蓝底白字，电压5/3v可选，接口并口串口可选
   HC4041尺寸介绍如下：

Module Size（W x H X T） 190.0x 54.0x 13.6 mm

Viewing Area (W x H ) 147.0x 29.5 mm

Character Size (W x H ) 2.78 x 4.89 mm

Dot Size (W x H ) 0.5 x0.55 mm

脚位定义如下：

Pin Symbol Level Function

1 DB7 H/L

2 DB6 H/L

3 DB5 H/L

4 DB4 H/L

5 DB3 H/L

6 DB2 H/L

7 DB1 H/L

8 DB0 H/L

Data bus line

9 E1 H-L Enable signal

10 R/W H/L “H” Read, “L” Write

11 RS H/L

“H” Data,

“L” Instruction code

12 VO - Operating voltage for lcd

13 VSS 0V GND

14 VDD +5V Power supply for logic

15 E2 H-L Enable signal

16 NC - No connection

17 A +4.2V

18 K 0V

Power supply for LED

backlight

显示效果图如下：