SunFounder LCD2004 Module with 3.3V Backlight for Arduino Uno R3 Mega2560 Raspberry Pi Display of 20x4 White Characters on Blue Background

Introduction LCD2004 display is a dot matrix module designed to display 20 characters including letter, number, and symbol, supporting 4-bit and 8-bit data transmission mode.It’s quite convenient for beginners to call the built-in library Liquid Crystal compatible with Arduino IDE, no need to edit yourself.Working voltage: 5V, Contrast adjustable with a 50K potentiometer onside.To use the 3.3V backlight, just connect pin A to 3.3V, pin K to GND.Note: Solder the pin headers on it before using.Pins’ Function VSS: Connected to ground VDD: Connected to a +5V power supply VO: To adjust the contrast RS: A register select pin that controls where in the LCD’s memory you are writing data to.You can select either the data register, which holds what goes on the screen, or an instruction register, which is where the LCD’s controller looks for instructions on what to do next.R/W: A Read/Write pin to select between reading and writing mode E: An enabling pin that, when low-level energy is supplied, causes the LDC module to execute relevant instructions.sunfounder.cc/index.php?title=LCD2004_Module Package Included 1 x LCD2004(The Pin Not Included)'