{"product_id":"lcd2004-2004-lcd-module-blue-green-white-screen-20x4-character-lcd-display-iic-i2c-serial-interface-adapter-module-for-arduino","title":"LCD Display 2004 Module Character 20x4 Blue\/White Blacklight","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch1\u003eLCD Display 2004 Module Character 20x4 Blue\/White Blacklight\u003cbr\u003e\u003cbr\u003eLCD2004 20x4 Character LCD Display Module for Arduino and Raspberry Pi with I2C Interface\u003c\/h1\u003e\n\u003cp\u003eThis \u003cstrong\u003eLCD2004 20x4 character LCD module\u003c\/strong\u003e combines a blue or green backlit LCD display with an I2C serial interface backpack, making it easy to connect to Arduino and Raspberry Pi projects using only four wires. Built around an HD44780-compatible controller, it provides a reliable and widely supported solution for showing text, numbers, sensor readings, and status information in embedded systems.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e20x4 Display Format:\u003c\/strong\u003e Shows 4 lines of 20 characters each for a total of 80 characters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eI2C Serial Interface:\u003c\/strong\u003e Uses a PCF8574-based backpack to reduce wiring and save GPIO pins.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHD44780-Compatible Controller:\u003c\/strong\u003e Works with standard LCD libraries and common microcontroller platforms.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5V Operation:\u003c\/strong\u003e Designed for stable use with 5V DC power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdjustable Contrast:\u003c\/strong\u003e Built-in potentiometer for contrast and backlight adjustment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArduino and Raspberry Pi Compatible:\u003c\/strong\u003e Easy to wire and suitable for hobby and prototype projects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eLCD2004 character LCD display module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay Size\u003c\/td\u003e\n\u003ctd\u003e20 columns x 4 rows\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBacklight Colour\u003c\/td\u003e\n\u003ctd\u003eBlue or green\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eI2C \/ IIC serial interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController\u003c\/td\u003e\n\u003ctd\u003eHD44780-compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking Voltage\u003c\/td\u003e\n\u003ctd\u003e5V only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDefault I2C Address\u003c\/td\u003e\n\u003ctd\u003e0x27 for PCF8574T, 0x3F for PCF8574AT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiring\u003c\/td\u003e\n\u003ctd\u003eGND to GND, VCC to VCC, SDA to A4, SCL to A5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Feature\u003c\/td\u003e\n\u003ctd\u003ePotentiometer for contrast adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cp\u003eIdeal for displaying \u003cstrong\u003ereal-time clock data\u003c\/strong\u003e, \u003cstrong\u003etemperature\u003c\/strong\u003e, \u003cstrong\u003ehumidity\u003c\/strong\u003e, menu text, sensor readings, device status, and other alphanumeric information. This 20x4 LCD display module is commonly used in Arduino projects, Raspberry Pi builds, automation systems, and general electronics prototypes where a clear character display is needed.\u003c\/p\u003e\n\u003ch2\u003eNotes\u003c\/h2\u003e\n\u003cp\u003eBefore use, check the I2C backpack chip to confirm the address and install the appropriate LCD library for your board. The module operates at 5V only, and the potentiometer should be adjusted to achieve the best contrast and backlight visibility.\u003c\/p\u003e\n\u003ch2\u003ePackage Includes\u003c\/h2\u003e\n\u003cp\u003e1 x LCD2004 20x4 LCD display module with I2C serial interface backpack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Unbranded","offers":[{"title":"Green","offer_id":57869828260224,"sku":"ALX-3256806334199993-12000037514915852-GREEN","price":4.99,"currency_code":"GBP","in_stock":true},{"title":"Blue","offer_id":57869828292992,"sku":"ALX-3256806334199993-12000037514915852-BLUE","price":4.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0924\/9590\/5152\/files\/S65729be85ea74b25aa3256c6ef478ed3p.webp?v=1776130183","url":"https:\/\/dukes-supplies.co.uk\/products\/lcd2004-2004-lcd-module-blue-green-white-screen-20x4-character-lcd-display-iic-i2c-serial-interface-adapter-module-for-arduino","provider":"Dukes Supplies","version":"1.0","type":"link"}