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LCD 1602 Module

Introduction

LCD1602, or 1602 character-type liquid crystal display, is a kind of dot matrix module

to show letters, numbers, and characters and so on. It's composed of 5x7 or 5x11 dot

matrix positions; each position can display one character. There's a dot pitch

between two characters and a space between lines, thus separating characters and

lines. The model 1602 means it displays 2 lines of 16 characters.

Generally, LCD1602 has parallel ports, that is, it would control several pins at the same

time. LCD1602 can be categorized into eight-port and four-port connections. If the

eight-port connection is used, then all the digital ports of the SunFounder Uno board

are almost completely occupied. If you want to connect more sensors, there will be

no ports available. Therefore, the four-port connection is used here for better

application.

Pins Functions

Function

VSS

connected to ground

VDD

connected to a +5V power supply

to adjust the contrast

A register select pin that controls where in the LCD’s

memory you are writing data to. You can select either the

data register, which holds what goes on the screen, or an

instruction register, which is where the LCD’s controller

looks for instructions on what to do next.

R/W

A Read/Write pin to select between reading and writing

mode

SunFounder

Summary of content (7 pages)

PAGE 1
LCD 1602 Module Introduction LCD1602, or 1602 character-type liquid crystal display, is a kind of dot matrix module to show letters, numbers, and characters and so on. It's composed of 5x7 or 5x11 dot matrix positions; each position can display one character. There's a dot pitch between two characters and a space between lines, thus separating characters and lines. The model 1602 means it displays 2 lines of 16 characters.
PAGE 2
An enabling pin that reads the information when High level (1) is received. The instructions are run when the signal changes from High level to Low level. E D0-D7 to read and write data AA Pins that control the LCD backlight. Connect A to 3.3V. K Pins that control the LCD backlight. Connect K to GND.
PAGE 3
Step 1: Build the circuit (make sure the pins are connected correctly. Otherwise, characters will not be displayed properly): S n u r e d n u o F Step 2: Download the package LCD1602_for_Arduino [http://wiki.sunfounder.cc/images/b/b2/LCD1602_for_Arduino.rar], then unzip it and open the LCD1602.
PAGE 4
Step 3: Select correct Board and Port Step 4: Upload the sketch to the SunFounder Uno board Experimental Phenomenon Note: You may need to adjust the potentiometer on the LCD1602 until it can display clearly. You should now see the characters "SunFounder" and "hello, world! " rolling on the LCD.
PAGE 5
Experimental Procedures Step 1: Build the circuit (please be sure the pins are connected correctly. Otherwise, characters will not be displayed properly): LCD1602 VDD VSS VO RS R/W E D0-D3 D4 D5 D6 D7 A K Raspberry Pi GND 5V Connect to the middle pin of potentiometer GPIO27 GND GPIO22 Not connected GPIO25 GPIO24 GPIO23 GPIO18 3.
PAGE 6
Note: After you run the code, characters may not appear on the LCD1602. You need to adjust the contrast of the screen (the gradual change from black to white) by spinning the potentiometer clockwise or anticlockwise, until the screen displays characters clearly. Step 2: Transfer the package LCD1602_for_Raspberry_Pi [http://wiki.sunfounder.cc/images/8/87/LCD1602_for_Raspberry_Pi.zip] to the Raspberry Pi wget http://wiki.sunfounder.cc/images/8/87/LCD1602_for_Raspberry_Pi.
PAGE 7
Experimental Phenomenon You should see two lines of characters displayed on the LCD1602: “hello, world! ” , “SunFounder”.