Demo Ardruino.MD

README.MD

Equip

• I use Ardruino NANO (China Version)
• Ardruino IDE 1.8.2

Learning

• circuits.io for simulate
• SPA YX-360TR E-B for Probe/Test/And Learn

setup in Ardruino IDE

• Board : Arduino NANO
• Processor : ATmega328 <== VERY IMPORTANT !!!! / if set as ATmega168 cause CAN NOT UPLOAD PROGRAM !!!
• Port : COM4
• Programmer : AVR ISP
• Run Android IDE as Administrator

Fade In And Out.c

// Pin 13 has an LED connected on most Arduino boards.
// give it a name:
int led = 13;
int d9 = 9 ;
int delay1 = 200;

// the setup routine runs once when you press reset:
void setup() {
  // initialize the digital pin as an output.
  pinMode(led, OUTPUT);
  pinMode(d9, OUTPUT);
}

float vto255(float f_volt) {
  float ratio = 51.0 ; /* convert from 5 volt to 3 volt  scale 255  */
  float ret =  ratio * f_volt ;
  if (ret > ratio* 3.0) { 
    ret = ratio * 3.0;
  }
  if(ret < 0 ) ret =  0 ;
  return ret ;
}

// the loop routine runs over and over again forever:

void loop() {

  int i_volt = 30 ;
  float volt255 ;
  float f_volt = 0.0;

  digitalWrite(led, HIGH) ;
  for (f_volt = 3.0 ; f_volt > 0.0 ; f_volt -= 0.01 ) {
    //f_volt =  (i_volt  );
    volt255 = vto255(f_volt);
    analogWrite(d9, volt255 );
    delay(delay1);
  }

  digitalWrite(led, LOW) ;
  for (f_volt = 0.0 ; f_volt < 3.0 ; f_volt += 0.01 ) {
    //f_volt =  (i_volt  );
    volt255 = vto255(f_volt);
    analogWrite(d9, volt255 );
    delay(delay1);
  }

}

Simple Test Blink .c

// REF:  FROM Arduino WebSite 

int led = 13; //  PIN D13 ( D = Digital ) 
void setup() {
  pinMode(led, OUTPUT);   // SET MODE 
}

void loop() {
  digitalWrite(led, HIGH);  // ON 
  delay(2000);
  digitalWrite(led, LOW);  // OFF 
  delay(2000);
}