LCD module 16x2 is a
display which is used for showing a character given by the system, in
this case a information paint system is microcontroller. To
communicate with a microcontroller based on the length of the data, the
LCD has two interface methods, namely interface 4 bit and 8-bit
interface
8 bits interface methods, data written or read by a microcontroller to/from the LCD is done once process. As for the 4-bit interface methods, writing or reading is done twice for 8 bit data. 4
bit LCD interface is set to write mode data, by connecting the foot of
R/W to GND. with 4 bit method, the use of I/O ports on the
miktokontroller can be reduced so that the port can be used to process
other i/o
In this circuit, there is a trimpot (trimmer potentiometer)10KΩ. The function of the trimpot used to set the contrast of characters displayed on the LCD
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