Thursday, July 31, 2014

Circuit Schematic for Interfacing JHD162A LCD Module 16×2 to Arduino UNO

Eltronicschool. - This is a circuit schematic for interfacing JHD 162A LCD module 16x2 to Arduino UNO microcontroller. This article we get from site. And now we will show you the circuit schematic for this interfacing included the description.

LCD modules form a very important part in many arduino based embedded system designs. So the knowledge on interfacing LCD to arduino is very essential in designing  embedded systems. This article is about interfacing a 16×2 LCD  to Arduino. JHD162A is the LCD module used here. JHD162A is a 16×2 LCD module based on the HD44780 driver from Hitachi. 

The JHD162A has 16 pins and can be operated in 4-bit mode or 8-bit mode. Here we are using the LCD module in 4-bit mode. First, I will show you how to display plain text messages on the LCD module using arduino and then  few useful projects using LCD and arduino.

Circuit Schematic Diagram

Figure 1. Circuit Schematic for Interfacing JHD162A LCD Module 16×2 to Arduino UNO (Circuitstoday)

Component List
  1. Arduino UNO
  2. JHD 162A LCD Module
  3. R1 = 560 ohm
  4. VR = 10K


Circuit schematic like in figure 1 above is Circuit Schematic for Interfacing JHD162A LCD Module 16×2 to Arduino UNO. RS pin of the LCD module is connected to digital pin 12 of the arduino. R/W pin of the LCD is grounded. Enable pin of the LCD module is connected to digital pin 11 of the arduino. In this project, the LCD module and arduino are interfaced in the 4-bit mode. That means only four of the digital input lines( DB4 to DB7 of the LCD are used). 

Figure 2.  JHD162A LCD Module (Circuitstoday)

This method is very simple, requires less connections and you can almost utilize the full potential of the LCD module. Digital lines DB4, DB5, DB6 and DB7 are interfaced to digital pins 5, 4, 3 and 2 of the Arduino. The 10K potentiometer is used for adjusting the contrast of the display. 560 ohm resistor R1 limits the current through the back light LED. 

The arduino can be powered through the external power jack provided on the board. +5V required in some other parts of the circuit can be tapped from the 5V source on the arduino board. The arduino can be also powered from the PC through the USB port.

To know more the pins of JHD 16A LCD module and also the complete program list for the Interfacing JHD162A LCD Module 16×2 to Arduino UNO please click here.

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