Aquí os presento un reloj digital mu completo que con muy pocos componentes podemos llegar a construir.
Este proyecto necesita:
- Una placa Arduino
-Bus i2c para la pantalla LCD
-Pantalla LCD 16 X 2
-Reloj DS1307 RTC
-Sensor de humedad y temperatura DHT 11
-Cables de conexión
-Protoboard
Para la construcción de esta fantástica estación meteorológica hemos decidido utilizar un bus I2C con el fin de ahorrar en cables y para que el producto final sea mas limpio y profesional.
El esquema de conexión es el siguiente:
No nos olvidemos de la parte mas importante !!! El código.
/*-----( Import needed libraries )-----*/
#include <dht11.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Time.h>
#include <DS1307RTC.h>
//const char* zile[] =
// { "Lun", "Mar", "Mie", "Jue", "Vie", "Sab", "Dom"}; //days of the week
const char* mesi[] =
{"Dic", "Ene", "Feb", "Mar", "Abr", "May", "Jun", "Jul", "Ago", "Sep", "Oct", "Nov" }; //months of the week
// {"Dic", "Gen", "Feb", "Mar", "Apr", "Mag", "Giu", "Lug", "Ago", "Set", "Ott", "Nov" }; //months of the week
byte termometru[8] = //icon for termometer
{
B00100,
B01010,
B01010,
B01110,
B01110,
B11111,
B11111,
B01110
};
byte picatura[8] = //icon for water droplet
{
B00100,
B00100,
B01010,
B01010,
B10001,
B10001,
B10001,
B01110,
};
/*-----( Declare objects )-----*/
// set the LCD address to 0x20 for a 16 chars 2 line display
// Set the pins on the I2C chip used for LCD connections:
// addr, en,rw,rs,d4,d5,d6,d7,bl,blpol
//LiquidCrystal_I2C lcd(0x20, 4, 5, 6, 0, 1, 2, 3, 7, NEGATIVE); // Set the LCD I2C address
//added by Marco Sessa
LiquidCrystal_I2C lcd(0x27,16,2); // set the LCD address to 0x20(Cooperate with 3 short circuit caps) if your model is different from mine.
dht11 DHT11;
/*-----( Declare Constants, Pin Numbers )-----*/
#define DHT11PIN 2 //dht11 signal pin connected to D2
void setup() /*----( SETUP: RUNS ONCE )----*/
{
Wire.begin();
lcd.begin(16,2); // initialize the lcd for 16 chars 2 lines, turn on backlight
lcd.backlight();
lcd.clear();
lcd.createChar(1,termometru);
lcd.createChar(2,picatura);
// part code from http://tronixstuff.wordpress.com/
Wire.beginTransmission(0x68);
Wire.write(0x07); // move pointer to SQW address
Wire.write(0x10); // sends 0x10 (hex) 00010000 (binary) to control register - turns on square wave
Wire.endTransmission();
// end part code from http://tronixstuff.wordpress.com/
setSyncProvider(RTC.get);
}/*--(end setup )---*/
void loop() /*----( LOOP: RUNS CONSTANTLY )----*/
{
afisare_temperatura(); //displaying temperature
data_si_ora(); //displaying date and time
}
void afisare_temperatura()
{
int chk = DHT11.read(DHT11PIN);
lcd.setCursor(1, 1);
lcd.write(1);
lcd.setCursor(3, 1);
lcd.print((float)DHT11.temperature, 0);
lcd.setCursor(5, 1);
lcd.print((char)223); //degree sign
lcd.print("C");
lcd.setCursor(9, 1);
lcd.write(2);
lcd.setCursor(11, 1);
lcd.print((float)DHT11.humidity, 0);
lcd.print("%");
delay(2000);
}
void data_si_ora()
{
tmElements_t tm;
(RTC.read(tm));
lcd.setCursor(0, 0);
afisare2cifre(tm.Hour);
lcd.print(":");
afisare2cifre(tm.Minute);
lcd.setCursor(7,0);
afisare2cifre(tm.Day);
lcd.print(" ");
lcd.print(tm.Month[mesi]);
lcd.print(" ");
lcd.print(tmYearToCalendar(tm.Year)-2000);
// lcd.setCursor(12,1); // this code is used for displaying day of the week
// lcd.print(tm.Wday[zile-2]); //it's disabled because for some reason it doesn't work on i2c display
}
void afisare2cifre(int numar) { //this adds a 0 before single digit numbers
if (numar >= 0 && numar < 10) {
lcd.write('0');
}
lcd.print(numar);
}
Muy blog, muchos de los componentes que se usan en empresa de inyeccion de plastico, funcionan con corriente alterna, que descubrió uno de los inventores mas importantes de la historia Nícolas Tesla
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