I2C Interface Module

KSh150.00

● In Stock

SKU	AT-0198
Category	Electronic Components
Availability	In Stock
Shipping	Countrywide delivery · Free on orders over KSh10,000.00

Description

The I2C Interface Module (based on the PCF8574 I/O expander chip ) allows standard LCD1602 and LCD2004 character displays to communicate via the I²C (Inter-Integrated Circuit) protocol using only two data lines (SDA & SCL) . This module simplifies wiring and frees up digital pins on your Arduino, ESP32, STM32, or Raspberry Pi , making it ideal for compact or multi-sensor projects. It also includes a built-in contrast adjustment potentiometer and jumper-selectable I²C address , giving you complete control over multiple displays on one bus.

Key Features

Reduces wiring from 6–8 pins down to just 2 data lines.
Fully compatible with LiquidCrystal_I2C and Wire Arduino libraries.
Compact and easy to mount behind your LCD module.
Adjustable contrast and backlight control for flexible display brightness.

Specifications

Chipset	PCF8574 (I/O Expander for I²C Bus)
Interface	I²C (SDA / SCL)
Operating Voltage	5V DC (3.3V compatible on some boards)
Default I²C Address	0x27 (adjustable to 0x3F via jumper)
Backlight Control	ON/OFF jumper
Contrast Adjustment	Onboard potentiometer
Pins	GND, VCC, SDA, SCL
Dimensions	Approx. 41 × 20 × 10 mm
Compatible With	LCD1602, LCD2004, and other HD44780-based displays
Supported Boards	Arduino UNO / Nano / Mega2560 / ESP32 / STM32 / Raspberry Pi
Daisy-chain support	connect multiple displays on one I²C bus.