红外遥控器控制风扇转速. 红外信号针脚接11, 马达正极接6.

IRremote-fan-speed.ino

#include <IRremote.h>

int RECV_PIN  = 11;
int MOTOR_PIN =  6;

IRrecv irrecv(RECV_PIN);
decode_results results;

const int analogMin = 0;
const int analogMax = 255;

float power          = 1.0f;
boolean state_on_off = false;

void setup()
{
  Serial.begin(9600);
  pinMode(MOTOR_PIN, OUTPUT);
  analogWrite(MOTOR_PIN, analogMin);
  irrecv.enableIRIn();
}

void loop()
{
  int val = irrecv.decode(&results);
  if (val) {
    switch (results.value) {
      case 0xFFA25D: // REMOTE CONTROL BUTTON 'ON'
      {
        state_on_off = true;
        analogWrite(MOTOR_PIN, power * analogMax);
      }
      break;
      case 0xFFE21D: // REMOTE CONTROL BUTTON 'OFF'
      {
        state_on_off = false;
        analogWrite(MOTOR_PIN, analogMin);
      }
      break;
      case 0xFF9867: // REMOTE CONTROL BUTTON 'UP'
      {
        if (state_on_off) {
          power += 0.2;
          if (power > 1.0) {
            power = 1.0f;
          }
          analogWrite(MOTOR_PIN, power * analogMax);
        }
      }
      break;
      case 0xFFB04F: // REMOTE CONTROL BUTTON 'DOWN'
      {
        if (state_on_off) {
          power -= 0.2;
          if (power < 0.2) {
            power = 0.2f;
          }
          analogWrite(MOTOR_PIN, power * analogMax);
        }
      }
      break;
    }
    Serial.println(results.value, HEX);
    irrecv.resume();
  }
}