Question

Embedded Systems Project Assignment 02 Connect a potentiometer and a LDR to your Arduino board. Using an H bridge connect a DC motor to the circuit. Control the speed (potentiometer) and direction of rotation (LDR). Display the speed and the direction of rotation on a 2X16 LCD display. 1 1.Written Report 1.1. Project Specification 1.2. Circuit schematic 10 points 25 points 10 points 1.3. Flow chart 1.4. Variable declarations 1.5. C code, uploadable on your Arduino Uno Board, that executes the activities stated 25 points by the flow chart

Answer 1

Arduino Code:

#include <LiquidCrystal.h>

#define pot A0
#define LDR A1

#define input1 8
#define input2 9
#define pwm 10

float Pot_val = 0;
float LDR_val = 0;

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

void setup()
{
pinMode(pot, INPUT);
pinMode(LDR, INPUT);
pinMode(input1, OUTPUT);
pinMode(input2, OUTPUT);
pinMode(pwm, OUTPUT);
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
lcd.clear();
}

void loop()
{
Pot_val = analogRead(pot) / 1023 * 255;
analogWrite(pwm, Pot_val);
  
lcd.setCursor(0, 0);
lcd.print("speed:");
lcd.setCursor(7, 0);
lcd.print(Pot_val / 255 * speed_max);
  
LDR_val = analogRead(LDR) / 1023 * 10;
lcd.setCursor(11, 0);
lcd.print("Dir:");
if (LDR_val > 5)
{
digitalWrite(input1, 1);
digitalWrite(input2, 0);
lcd.setCursor(0, 1);
lcd.print("Clockwise");
}
else if (LDR_val < 5)
{
digitalWrite(input1, 0);
digitalWrite(input2, 1);
lcd.setCursor(0, 1);
lcd.print("Anti-Clockwise");
}
}