User Manual

139
Lesson 30 I2C LCD1602
Introduction
LCD1602 is a character type liquid crystal display, which can display 32 (16*2) characters at
the same time. It has 16 pins, of which at least 7 would be used each time. You can use a
PCF8574 I2C chip to expand I/O ports so only two GPIO ports would be occupied.
Components
- 1 * Raspberry Pi
- 1 * Breadboard
- 4 * Jumper wires (Male to Male, 2 red and 2 black)
- 1 * Network cable (or USB wireless network adapter)
- 1 * I2C LCD1602
- Several jumper wires (Male to Female)
Experimental Principle
In this experiment, I2C is used to configure LCD so that you can control the LCD1602 to display
characters. The I2C slave address of I2C LCD1602 here is 0x27.
Experimental Procedures
Step 1: Build the circuit
Raspberry Pi T-Cobbler I2C LCD1602 Module
SCL SCL1 SCL
SDA SDA1 SDA
5V 5V0 VCC
GND GND GND