I2C TWI SPI Serial Interface Board Port LCD2004 LCD1602 Adapter

An I2C adapter for 1604 (16x4 character) LCD screens is a small interface board using a PCF8574 chip. It cuts down the wires needed from 10 or more down to just 4. It works with 5V power and connects via two data lines (SDA and SCL).Main FeaturesUses only two microcontroller pins for data communication (SDA and SCL).Runs on a standard 5V DC power supply.Built-in blue or white board potentiometer to adjust screen contrast.Built-in jumper pin to turn the LED backlight on or off.Default I2C address is usually set to 0x27 or 0x3F, and can be changed by soldering address pads (A0, A1, A2).Compatible with 1602, 1604, and 2004 character LCD modules.Why Use ItSaves precious input/output pins on Arduino, Raspberry Pi, and other microcontrollers.Makes wiring fast and clean by replacing a bulky parallel bus with a 4-pin Dupont cable (VCC, GND, SDA, SCL).