Controlling Servo motor using potentiometer and display angle on LCD
Components:
1.potentiometer
2.Servo Motor
3. I2C Module
4.16x2 LCD
5.Arduinos UNO
6. Jumper Wires
Circuit Diagram:
Proteus simulation:
Hardware;
Before Going Toward Code Must Install Library LiquidCrystal_I2C
So click on
Ctrl+Shift+I
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#include <Wire.h>
#include <LiquidCrystal_I2C.h>
// Set the LCD address to 0x27 for a 16 chars and 2 line display
//LCD settings
const uint8_t I2C_ADDRESS =0x27 ;//watch video. use I2C Scanenr to get the address
const uint8_t LCD_CHAR= 16;
const uint8_t LCD_LINE = 2;
char *TITLE_ANGLE1 ="Angle: ";
LiquidCrystal_I2C lcd(I2C_ADDRESS, LCD_CHAR, LCD_LINE);
unsigned int LCD_VCC=13;//5V pin for LCD
#include <Servo.h>
// start of servo1 settings *******
Servo myservo1; // create servo 1 object to control a servo
int pot1pin = A0; // analog pin used to connect the potentiometer
int pot1VccPin = 12;//pin 12 used as 5V for potentiometer
unsigned int servo1Pin=3;//any pin with ~ which means pin is PWM enabled
unsigned int servo1AngleMin=0;//servo1 minimum angle
unsigned int servo1AngleMax=180;//servo1 maximum angle details
//// do not change the lines below
unsigned int servo1Val=0;// variable to read the value from the analog pin
unsigned int angle1=0;
// END of servo1 settings *******
void setup()
{
Serial.begin(9600);
Serial.println("eshop");
Serial.println("Angle:");
myservo1.attach(servo1Pin); // attaches the servo 1 to the servo object
pinMode(pot1VccPin, OUTPUT);
digitalWrite(pot1VccPin,HIGH);//5V for Potentiometer (variable resistor)
// initialize the LCD
pinMode(LCD_VCC, OUTPUT);
digitalWrite(LCD_VCC,HIGH);//5V for LCD
//lcd.begin();
lcd.init();
lcd.init();
lcd.backlight();
lcd.print("eshop");
lcd.setCursor(0,1);
lcd.print("Angle: ");
delay(2000);
}
void loop()
{
servo1Val = analogRead(pot1pin); // reads the value of the potentiometer (value between 0 and 1023)
sendServo(servo1Val);//send sevo zero
delay(30);
}// loop end
void sendServo(int value)
{
unsigned int newAngle1;
newAngle1 = map(value, 0, 1023, servo1AngleMin, servo1AngleMax); // scale it to use it with the servo (value between servoAngleMin and servoAngleMax)
if(angle1 !=newAngle1)
{
myservo1.write(newAngle1);
lcdDisplay(newAngle1);
angle1 =newAngle1;
delay(200);
}
}//sendServo()
void lcdDisplay(int angle)
{
clearCharacters();
Serial.print("angle");
Serial.println(angle);
lcd.setCursor((unsigned)strlen(TITLE_ANGLE1), 1);
lcd.print(angle);//print value of angle
lcd.print((char)223);
} // clearCharacters()
void clearCharacters()
{
for (int i=(unsigned)strlen(TITLE_ANGLE1)-1; i<=LCD_CHAR-1; i++)
{
lcd.setCursor (i,1); //
lcd.write(254);
}
}//clearCharacters
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what is the meaning of lcd.setCursor(0,1);
Answer:
Its mean second Row and First column of LCD .
What is the neam of lcd.print((char)223);
Answer:
This is the degree symbol to display it on LCD.
Video:
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