Arduino : Automatic cooling system

Schéma du Montage :

Photos :

Code :

/*

Sites utiles :

https://github.com/UniQHW/SH5461AS

https://github.com/ChecheSwap/Seven_Segments_4Digits_SMA420564L-ATMEGA328P

https://github.com/se4oev/4-Digit-7-Segment-Display-SH5461AS/blob/master/SH5461AS_edit_/SH5461AS.ino

https://osoyoo.com/2017/08/08/arduino-lesson-4-digit-7-segment-led-display/

http://thomas.bibby.ie/using-the-kyx-5461as-4-digit-7-segment-led-display-with-arduino/

*/

//https://www.electronicwings.com/arduino/thermistor-interfacing-with-arduino-uno

#include <math.h>

const int thermistor_output = A1;

//Определяем пины к которым подключены аноды (a, b, c...)

#define a 7  //1

#define b 11 //2

#define c 2  //3

#define d 4

#define e 5

#define f 8  //6

#define g 13 //7

#define p 3  //8

//Определяем пины к которым подключены катоды

#define d4 12  //9 // Первый разряд

#define d3 10

#define d2 9   //11

#define d1 6   //12 

//Определяем переменные

//int del = 100;  //задержка между сменой цифр

long n = 0;// n represents the value displayed on the LED display. For example, when n=0, 0000 is displayed. The maximum value is 9999. 

int x = 100;

int del = 5;//Set del as 5; the value is the degree of fine tuning for the clock

int count = 0;//Set count=0. Here count is a count value that increases by 1 every 0.1 second, which means 1 second is counted when the value is 10

float temperature = 35.47;

void setup()

{  

  Serial.begin(9600);

  pinMode(d1, OUTPUT);    //определяем назначение цифровых пинов

  pinMode(d2, OUTPUT);

  pinMode(d3, OUTPUT);

  pinMode(d4, OUTPUT);

  pinMode(a, OUTPUT);

  pinMode(b, OUTPUT);

  pinMode(c, OUTPUT);

  pinMode(d, OUTPUT);

  pinMode(e, OUTPUT);

  pinMode(f, OUTPUT);

  pinMode(g, OUTPUT);

  pinMode(p, OUTPUT);

  pinMode(A0, OUTPUT);  //RELAY PIN

  digitalWrite(A0, LOW);

}

 

void loop()

{  

  //only read temp every 100 cycles

  if(count%50 == 0) {     

    temperature = get_thermistor();

    count = 0;

  }  

  count ++;

  displayTemperature();  

  Serial.print(temperature);

  if (temperature > 29.0 ) {

    digitalWrite(A0, HIGH);

    Serial.println(" : > 28");

  } else {

    digitalWrite(A0, LOW);

    Serial.println(" : < 28");

  }

  //delay(1000);

}

void displayTemperature() {

  clearLEDs();

  pickDigit(1);

  pickNumber(tens(temperature));// get the value of thousand

  delay(del);//delay 5ms

  

  clearLEDs();

  pickDigit(2);

  dispDec(2);

  pickNumber(ones(temperature));// get the value of hundred

  delay(del);//delay 5ms

  clearLEDs();

  pickDigit(3);

  //dispDec(3);

  pickNumber(decimal(temperature));//get the value of ten

  delay(del);//delay 5ms

  

  clearLEDs();

  pickDigit(4);

  cee(); //degré celsius symbol

  delay(del);//delay 5ms

}

void pickDigit(int x) //light up a 7-segment display

{

  //The 7-segment LED display is a common-cathode one. So also use digitalWrite to  set d1 as high and the LED will go out

  digitalWrite(d1, HIGH);

  digitalWrite(d2, HIGH);

  digitalWrite(d3, HIGH);

  digitalWrite(d4, HIGH);

  switch(x)

  {

    case 1: 

    digitalWrite(d1, LOW);//Light d1 up 

    break;

    case 2: 

    digitalWrite(d2, LOW); //Light d2 up 

    break;

    case 3: 

    digitalWrite(d3, LOW); //Light d3 up 

    break;

    default: 

    digitalWrite(d4, LOW); //Light d4 up 

    break;

  }

}

 

void pickNumber(int x)   //define pickNumber(x)to display number x

{

  switch(x)

  {

  default: 

    zero(); 

    break;

  case 1: 

    one(); 

    break;

  case 2: 

    two(); 

    break;

  case 3: 

    three(); 

    break;

  case 4: 

    four(); 

    break;

  case 5: 

    five(); 

    break;

  case 6: 

    six(); 

    break;

  case 7: 

    seven(); 

    break;

  case 8: 

    eight(); 

    break;

  case 9: 

    nine(); 

    break;

  }

}

 

void dispDec(int x)  //концигурация анодов для вывода точки

{

  digitalWrite(p, HIGH);

}

 

void clearLEDs()  //Функция очищающая табло, устанавливает низкий уровень на всех анодах

{

  digitalWrite(a, LOW);

  digitalWrite(b, LOW);

  digitalWrite(c, LOW);

  digitalWrite(d, LOW);

  digitalWrite(e, LOW);

  digitalWrite(f, LOW);

  digitalWrite(g, LOW);

  digitalWrite(p, LOW);

}

 

void zero()  //конфигурация анодов для вывода нуля

{

  digitalWrite(a, HIGH);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, HIGH);

  digitalWrite(f, HIGH);

  digitalWrite(g, LOW);

}

 

void one()  //концигурация анодов для вывода единицы

{

  digitalWrite(a, LOW);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, LOW);

  digitalWrite(e, LOW);

  digitalWrite(f, LOW);

  digitalWrite(g, LOW);

}

 

void two()  // define 2 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, HIGH);

  digitalWrite(c, LOW);

  digitalWrite(d, HIGH);

  digitalWrite(e, HIGH);

  digitalWrite(f, LOW);

  digitalWrite(g, HIGH);

}

 

void three()  // define 3 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, LOW);

  digitalWrite(f, LOW);

  digitalWrite(g, HIGH);

}

 

void four()  // define 4 as cathode pin switch

{

  digitalWrite(a, LOW);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, LOW);

  digitalWrite(e, LOW);

  digitalWrite(f, HIGH);

  digitalWrite(g, HIGH);

}

 

void five()  // define 5 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, LOW);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, LOW);

  digitalWrite(f, HIGH);

  digitalWrite(g, HIGH);

}

 

void six()  // define 6 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, LOW);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, HIGH);

  digitalWrite(f, HIGH);

  digitalWrite(g, HIGH);

}

 

void seven()  // define 7 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, LOW);

  digitalWrite(e, LOW);

  digitalWrite(f, LOW);

  digitalWrite(g, LOW);

}

 

void eight()  // define 8 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, HIGH);

  digitalWrite(f, HIGH);

  digitalWrite(g, HIGH);

}

 

void nine()  // define 9 as cathode pin switch

{

  digitalWrite(a, HIGH);

  digitalWrite(b, HIGH);

  digitalWrite(c, HIGH);

  digitalWrite(d, HIGH);

  digitalWrite(e, LOW);

  digitalWrite(f, HIGH);

  digitalWrite(g, HIGH);

}

void cee()

{

  digitalWrite(a, HIGH);

  digitalWrite(b, LOW);

  digitalWrite(c, LOW);

  digitalWrite(d, HIGH);

  digitalWrite(e, HIGH);

  digitalWrite(f, HIGH);

  digitalWrite(g, LOW);

}

int tens(float x)

{

float divided = x/10.0;

return (int)divided;

}

int ones(float x)

{

float divided = x - (10.0 * tens(x));

return (int)divided;

}

int decimal(float x)

{

return int((x - ((int) x))*10);

}

double get_thermistor()

{

  int thermistor_adc_val;

  double output_voltage, thermistor_resistance, therm_res_ln, temperature; 

  thermistor_adc_val = analogRead(thermistor_output);

  output_voltage = ( (thermistor_adc_val * 5.0) / 1023.0 );

  thermistor_resistance = ( ( 5 * ( 10.0 / output_voltage ) ) - 10 ); /* Resistance in kilo ohms */

  thermistor_resistance = thermistor_resistance * 1000 ; /* Resistance in ohms   */

  therm_res_ln = log(thermistor_resistance);

  /*  Steinhart-Hart Thermistor Equation: */

  /*  Temperature in Kelvin = 1 / (A + B[ln(R)] + C[ln(R)]^3)   */

  /*  where A = 0.001129148, B = 0.000234125 and C = 8.76741*10^-8  */

  temperature = ( 1 / ( 0.001129148 + ( 0.000234125 * therm_res_ln ) + ( 0.0000000876741 * therm_res_ln * therm_res_ln * therm_res_ln ) ) ); /* Temperature in Kelvin */

  temperature = temperature - 273.15; /* Temperature in degree Celsius */

  //Serial.print("Temperature in degree Celsius = ");

  //Serial.print(temperature);

  //Serial.print("\t\t");

  //Serial.print("Resistance in ohms = ");

  //Serial.print(thermistor_resistance);

  //Serial.print("\n\n");

  return temperature;

}

int points(float x)  //not used

{

float divided = x - ((10.0 * tens(x)) + ones(x));

Serial.println(divided);

divided = divided*10;

Serial.println(divided);

divided = round(divided);

Serial.println(divided);

delay(1000);

return int(divided);

}

Arduino : Motor Speed Control With L293D and Joystick

Contrôler la vitesse d'un moteur avec le circuit L293D et Joystick

Schéma du Montage : (Version avec deux moteurs)

Photos :

Code :

//https://bou-tarek-my-arduino.blogspot.com/
//Inspiré de : https://electropeak.com/learn/l293d-control-drive-stepper-servo-dc-motors-by-arduino/


#define MOTOR_EN_1_2  10
#define MOTOR_IN1     9
#define MOTOR_IN2     8

#define MOTOR_EN_3_4  11
#define MOTOR_IN3     12
#define MOTOR_IN4     13

#define slow 64
#define normal 128
#define fast 255

// Joystick pin numbers
const int SW_pin = 2; // digital pin connected to switch output
const int X_pin = A0; // analog pin connected to X output
const int Y_pin = A1; // analog pin connected to Y output

void setup() {
  Serial.begin(9600);
  Serial.println("L293D DC motor");
  
  pinMode(MOTOR_EN_1_2, OUTPUT);
  pinMode(MOTOR_IN1, OUTPUT);
  pinMode(MOTOR_IN2, OUTPUT);
  digitalWrite(MOTOR_IN1, HIGH);
  digitalWrite(MOTOR_IN2, LOW);

  pinMode(MOTOR_EN_3_4, OUTPUT);
  pinMode(MOTOR_IN3, OUTPUT);
  pinMode(MOTOR_IN4, OUTPUT);
  
  //Joystick
  pinMode(SW_pin, INPUT);
  digitalWrite(SW_pin, HIGH);

}

void loop() {
  int joystick = analogRead(X_pin);
  int vitesse;
  if (joystick < 510 ){
    Serial.print("< ");
    vitesse = map(joystick, 0, 512,255, 0);
    analogWrite(MOTOR_EN_1_2, vitesse);
    digitalWrite(MOTOR_IN1, HIGH);
    digitalWrite(MOTOR_IN2, LOW);
  }else if (joystick >520 ){
     Serial.print("> ");
     vitesse = map(joystick, 500, 1020, 0, 255);
     analogWrite(MOTOR_EN_1_2, vitesse);
     digitalWrite(MOTOR_IN1, LOW);
     digitalWrite(MOTOR_IN2, HIGH);
  } else {
    Serial.print("= ");
    vitesse = 0;
    analogWrite(MOTOR_EN_1_2, vitesse);
    digitalWrite(MOTOR_IN1, HIGH);
    digitalWrite(MOTOR_IN2, HIGH);
  }
  Serial.print("Motor 1 : ");
  Serial.println(vitesse);
  joystick = analogRead(Y_pin);
  if (joystick < 510 ){
    Serial.print("< ");
    vitesse = map(joystick, 0, 512,255, 0);
    analogWrite(MOTOR_EN_3_4, vitesse);
    digitalWrite(MOTOR_IN3, HIGH);
    digitalWrite(MOTOR_IN4, LOW);
  }else if (joystick >520 ){
     Serial.print("> ");
     vitesse = map(joystick, 520, 1020, 0, 255);
     analogWrite(MOTOR_EN_3_4, vitesse);
     digitalWrite(MOTOR_IN3, LOW);
     digitalWrite(MOTOR_IN4, HIGH);
  } else {
    Serial.print("= ");
    vitesse = 0;
    analogWrite(MOTOR_EN_3_4, vitesse);
    digitalWrite(MOTOR_IN3, HIGH);
    digitalWrite(MOTOR_IN4, HIGH);
  }
  Serial.print("Motor 2 : ");
  Serial.println(vitesse);
}