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Sunday, May 1, 2011

Arduino - A/D conversion and LCD Interfacing

Basically, this project is meant to simultaneously test the A/D conversion and LCD driving capabilities of the Arduino platform. Turning the potentiometer will vary the number displayed on the LCD between 0 and 1023.

================================
What you will need:

1 x Arduino Board
1 x HD44780-compliant LCD module
1 x Potentiometer (I used a 10K linear here)
================================



The Setup

(Center pin to pin A5 on the board, side pins to ground and +5v.)


We will be driving the LCD module by 6 data pins here.

In this case, I connected them as follows:

LCD ">"> Arduino Pin
_____________
D7 2
D6 3
D5 4
D5 5
RS 12
Enable 10

Also, connect the R/W pin of the LCD module to ground.




Some serious 6 pin LCD drivin', yo!

(Vss to ground, Vcc to +5v, Vlc to ground via a 4.7K resistor[contrast])



The code below should work pretty well:
(See the LiquidCrystal() library on the Arduino website for more detailed info)

===================

#include <LiquidCrystal.h>

int sensorPin = A5;
int sensorValue = 0;

LiquidCrystal lcd(12, 10, 5, 4, 3, 2);

void setup()
{
}

void loop() {
sensorValue = analogRead(sensorPin);
delay(20);
lcd.clear();
lcd.print(sensorValue);
delay(50);
}

===================

(Here we can see the 4.7k resistor I used to set the contrast of the LCD module)






2 comments:

Anonymous said...

Its good

www.pradipyadav.com

Anonymous said...
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