มินิโปรเจค Arduino ควบคุม Servo Motor โดยใช้ Potentiometer

/*
Servo Motor Control with Potentiometer Arduino.

For more details visit:

https://miniarduino.blogspot.com/2019/03/arduino-servo-motor-potentiometer.html

*/


// include the library code:

#include <Wire.h>

#include <LiquidCrystal_I2C.h>

#include <Servo.h>

// Set the LCD address to 0x27 or 0x3F for a 16 chars and 2 line display

LiquidCrystal_I2C lcd(0x27, 16, 2);


Servo myservo; // create servo object to control a servo

int potpin = A0; // analog pin used to connect the potentiometer

int val; // variable to read the value from the analog pin



void setup() {


lcd.begin(); // initialize the LCD

lcd.backlight(); // Turn on the blacklight and print a message.

myservo.attach(9); // attaches the servo on pin 9 to the servo object

}

void loop() {

val = analogRead(potpin); // reads the value of the potentiometer (value // between 0 and 1023)

lcd.setCursor(0, 0); // set the cursor to column 0, line 0

lcd.print("ADC = " + String(val)); // print (value // between 0 and 1023) to the LCD.

val = map(val, 0, 1023, 0, 180); // scale it to use it with the servo value

lcd.setCursor(0, 1); // set the cursor to column 0, line 1

lcd.print("Servo = " + String(val)); // print (value // between 0 and 180) to the LCD.


// between 0 and 180)

myservo.write(val); // sets the servo position according to the

// scaled value

delay(15); // waits for the servo to get there

}