I2C Module for 16×2 LCD DisplaySKU 10002

Display Board & LED

I2C Module for 16×2 LCD Display

₹69

01 — About

What it does

The I2C Module for 16×2 LCD Display is a PCF8574-based I2C backpack that converts parallel HD44780 LCD interfaces to I2C. It dramatically reduces pin count from 6-7 pins to just 2 (SDA/SCL) for easy microcontroller integration.

Key features

  • PCF8574 I2C expander chip
  • Reduces pin count from 6-7 to 2 pins
  • I2C interface at 100kHz or 400kHz
  • Adjustable I2C address via solder jumpers
  • Backlight control via I2C commands
  • Onboard contrast potentiometer

Good to know

  • Must solder to LCD – requires basic soldering skills
  • Default address varies by manufacturer – use I2C scanner
  • Install LiquidCrystal_I2C library for Arduino
  • Some modules have backlight always on – others controllable
  • If display is blank, check contrast pot and I2C address

02 — Datasheet

Specifications

07
IC
PCF8574 or PCF8574A
Interface
I2C
I2C Address
0x20-0x27 (PCF8574) or 0x38-0x3F (PCF8574A)
Compatible LCD
HD44780 16×2, 20×4
Operating Voltage
5V
Connections
4-pin header (VCC, GND, SDA, SCL)
Dimensions
41mm x 19mm