Microcontroller 20

กันยายน 25, 2561

วัดไฟด้วย Arduino

อุปกรณ์

Arduino UNO
16 x 2 LCD Display
10KΩ POT
100KΩ
10KΩ
Connecting Wires

Circuit Diagram

Code 1

#include "LiquidCrystal.h"

LiquidCrystal lcd(2, 3, 4, 5, 6, 7);

float voltage = 0.0;

float temp=0.0;

int analog_value;

void setup()

{

lcd.begin(16, 2);

lcd.setCursor (0,0);

lcd.print(" Arduino based ");

lcd.setCursor(0,1);

lcd.print("Digital Voltmeter");

delay(2000);

}

void loop()

{

analog_value = analogRead(A0);

temp = (analog_value * 5.0) / 1024.0;

voltage = temp/(0.0909);

if (voltage < 0.1)

{

voltage=0.0;

}

lcd.clear();

lcd.setCursor(0, 0);

lcd.print("Voltage= ");

lcd.print(voltage);

lcd.setCursor(13,1);

lcd.print("V");

delay(30);

}

Code 2