{"product_id":"lcd-i2c-adapter-module-pcf8574-backpack","title":"LCD I2C Adapter Module — PCF8574, 16x2 \/ 20x4 LCD Backpack","description":"\u003ch2\u003eLCD I2C Adapter Module — PCF8574, 16x2 \/ 20x4 LCD Backpack\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eLCD I2C adapter module\u003c\/strong\u003e (PCF8574 backpack) converts any standard \u003cstrong\u003eHD44780-compatible 16x2 or 20x4 LCD display\u003c\/strong\u003e from a 16-pin parallel interface to a simple \u003cstrong\u003e2-wire I2C interface\u003c\/strong\u003e. Instead of using 6–8 Arduino digital pins for the LCD, you only need \u003cstrong\u003eSDA and SCL\u003c\/strong\u003e — freeing up valuable Arduino pins for other sensors and modules. Solder directly onto the LCD’s 16-pin header.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIC: \u003cstrong\u003ePCF8574\u003c\/strong\u003e | Interface: \u003cstrong\u003eI2C\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eI2C address: \u003cstrong\u003e0x20–0x27\u003c\/strong\u003e (3 address jumpers, 8 selectable)\u003c\/li\u003e\n\u003cli\u003eCompatible LCDs: \u003cstrong\u003eHD44780 16x2 and 20x4 character LCDs\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupply voltage: \u003cstrong\u003e3.3–5V\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eBacklight control: \u003cstrong\u003eYes (on-board transistor)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eContrast adjustment: \u003cstrong\u003eOn-board potentiometer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eLibrary: \u003cstrong\u003eLiquidCrystal_I2C Arduino library\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompliance: \u003cstrong\u003eRoHS compliant\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Choose This?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eReduces LCD wiring from 8 pins to 2\u003c\/strong\u003e — SDA + SCL only, freeing Arduino pins\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003e8 selectable I2C addresses\u003c\/strong\u003e — use up to 8 LCD displays on one I2C bus\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eOn-board contrast pot\u003c\/strong\u003e — adjust LCD contrast without external components\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eBacklight control\u003c\/strong\u003e — turn backlight on\/off via software\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eLiquidCrystal_I2C library\u003c\/strong\u003e — drop-in replacement for standard LiquidCrystal library\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eArduino 16x2 LCD display with I2C (2-wire) interface\u003c\/li\u003e\n\u003cli\u003e20x4 LCD display for Arduino data logging and menus\u003c\/li\u003e\n\u003cli\u003eMulti-LCD display projects using I2C address selection\u003c\/li\u003e\n\u003cli\u003eRaspberry Pi I2C LCD display interface\u003c\/li\u003e\n\u003cli\u003eReducing pin usage on Arduino Nano and Pro Mini projects\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Keszoox","offers":[{"title":"Default Title","offer_id":45672304640235,"sku":"","price":10.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/LCD-I2C-Daughter-Board-Module-1.jpg?v=1723008921","url":"https:\/\/keszoox.com\/products\/lcd-i2c-adapter-module-pcf8574-backpack","provider":"Keszoox","version":"1.0","type":"link"}