The PCF8574 I2C Serial Interface Adapter Module for 1602/2004 LCD is a small backpack board that converts a standard parallel-interface character LCD into an I2C device, controlled with just two wires. Built around the PCF8574 I/O expander chip, it dramatically reduces the number of microcontroller pins needed to drive a display.
Key features:
- I2C Communication: Uses only SDA and SCL lines to control the LCD, freeing up to ten GPIO pins on the host microcontroller.
- PCF8574 I/O Expander: Converts the I2C signal into the parallel data needed by standard HD44780-compatible LCD modules.
- Onboard Contrast Adjustment: A built-in potentiometer sets the display contrast without extra external components.
- Simple Pin Header: A 16-pin male header solders directly onto the back of common 1602 and 2004 character LCDs.
- Configurable I2C Address: Solder jumpers let multiple displays share the same bus without address conflicts.
- Wide Compatibility: Works with Arduino, ESP32, ESP8266, and Raspberry Pi using widely available I2C LCD libraries.
This adapter is the standard way to add a character display to a project while keeping wiring simple and pin usage to a minimum.
Pick up from the Woodmart Store
Courier delivery
DHL Courier delivery
