I2C Interface Module (PCF8574) for 1602/2004 LCD Displays

90.00 -10% 100.00

Pin-Saving LCD Adapter. 🔌 I2C module (PCF8574) converts parallel LCDs to 4-wire I2C. Essential for saving I/O pins on Arduino/ESP32 projects in Bangladesh.

AVAILABILITY: AVAILABLE
SKU: 215

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Description

Overview: Upgrade Your LCD with 4-Wire I2C Communication. The I2C Interface Module is a small but powerful adapter board that utilizes the PCF8574 I/O Expander chip. This module is essential for upgrading standard 1602 or 2004 parallel LCD displays, reducing the required connection wires from 12-16 pins down to just FOUR WIRES (VCC, GND, SDA, SCL). For engineers and makers in Bangladesh with complex projects, this adapter is a TRUSTED, EFFICIENT way to free up valuable I/O pins on microcontrollers like the Arduino UNO and ESP32. It requires basic soldering to attach to the back of a parallel LCD module.

Key Technical Features: Maximum Pin Savings. Adapter Chip: Based on the reliable PCF8574 8-bit I/O Expander. Interface: I2C/IIC SERIAL INTERFACE (Requires only 2 data pins: SDA and SCL). Compatibility: Compatible with most standard HD44780-based 16x2 and 20x4 Parallel LCD Displays. Control: Includes an ADJUSTABLE POTENTIOMETER for setting screen contrast and often a JUMPER CAP for controlling the backlight. Operating Voltage: 5V DC (Standard logic level). I2C Address: Commonly set to 0x27 or 0x3F (and can be modified via solder pads). Benefit: Drastically simplifies wiring and minimizes clutter in final assemblies.

Applications: Efficiency and Clean Wiring. This module is expertly suited for: Upgrading EXISTING 1602/2004 PARALLEL LCDS to use I2C, building PIN-LIMITED PROJECTS (e.g., using Arduino Nano or ESP8266), creating COMPACT, CLEAN WIRING for portable devices, and stacking multiple I2C devices on the same two data lines (SDA/SCL).

Safety Warning and Usage Notes (CRITICAL). This module requires BASIC SOLDERING SKILLS to permanently attach it to the 16 pins on the back of your parallel LCD. Ensure the I2C address used in your code matches the address of the module (0x27 or 0x3F) for proper communication.

Projectile Electronics Quality and Trust. We guarantee this I2C adapter module provides STABLE SERIAL COMMUNICATION, ensuring your text display is both reliable and highly pin-efficient.

Package Includes: 1 × I2C Interface Module (PCF8574 Adapter).