Tag Archives: LCD

Touch Screen interfacing with Arduino

Resistive touch screen displays are composed of multiple layers that are separated by thin spaces. Pressure applied to the surface of the display by a finger or stylus causes the layers to touch, which completes electrical circuits and tells the device where the user is touching.

In this chapter we are focusing only on 4-wire resistive touch screen interfacing. Continue reading Touch Screen interfacing with Arduino

Three Wire LCD Interface with Arduino

We have seen parallel interface technique using Arduino library and we know that it requires 6 IO Lines, Now let’s see how we can reduce required IO’s using 74HC595. We know that we can reduce number IO required by using I2C based LCD interface circuit; It costs ten times more than 74HC595 Circuit.

Arduino 3 wire LCD interface circuit

            In this circuit similar to the bargraph display we are using 74HC595 Shift register to interface 16×2 LCD. Continue reading Three Wire LCD Interface with Arduino

LCD interface using I2C Module with Arduino

I2C module with LCD display using Arduino

 How to interface PCF85574 module with arduino?
To connect LCD display 16×2 or 20×4 to Arduino you know you’ll need at least 6 wires to connect, it means sacrificing some IO’s that could be used for connecting other components such as sensors or motors. another way is to use 74HC595 Shift register for interfacing. In this tutorial we will discuss on PCF85574 I2C LCD Display Interface.
A module that can be used to circumvent this problem is the I2C Module for LCD Display with PCF85574 (datasheet ):

Continue reading LCD interface using I2C Module with Arduino

16×2 LCD Display interface with Arduino

Introduction

In this tutorial we will learn How to interface 16×2 LCD display using arduino. LCD displays available in various sizes 8×1, 16×1, 16×2, 16×4, 20 Char x 4 Lines. These all displays can be interfaced using this tutorial. We are more focusing on 16×2 LCD. It is commonly used. Continue reading 16×2 LCD Display interface with Arduino