Question

我正在编程Arduino。我的红外传感器有问题。它只能在0.5米范围内探测到这个球（配备红外LED），我需要至少2米。这是球：＆＃34; http://drgraeme.net/drgraeme-free-nxt-g-tutorials/Ch108/SoccerGenIINXTG/Soccer%20Ball/HiTechnicRCJ05V2.jpg＆＃34; 这是我的arduino代码：

// digital pin 2 has a pushbutton attached to it. Give it a name:
int IR = 2;
int i = 0;
int ii = 0;
int led = 0;


void setup() 
{ 
  Serial.begin(9600);
  pinMode(IR, INPUT_PULLUP);
  pinMode(led, OUTPUT);
}

void loop() { 
  i = 0;
  ii = 0;
  do
  {
  i = i + 1;
  int STANJE1 = digitalRead(IR);
   if(STANJE1 < 1)
   {
   ii = ii + 1; 
   } 
  }while(i<1000);

if(ii > 1)
{Serial.println("IS");}
else{Serial.println("IS NOT");}  
}

红外传感器是38kHZ，球LED是40kHZ，但是我找到了一个程序，让我可以检测距离传感器10米远的球，但这是其他的东西，我不明白，所以那不是问题。这是进一步发挥作用的代码（那是因为它没有使用＆＃34; DigitalRead（）＆＃34;）

/* Raw IR decoder sketch!

 This sketch/program uses the Arduno and a PNA4602 to 
 decode IR received. This can be used to make a IR receiver
 (by looking for a particular code)
 or transmitter (by pulsing an IR LED at ~38KHz for the
 durations detected 

 Code is public domain, check out www.ladyada.net and adafruit.com
 for more tutorials! 
 */

// We need to use the 'raw' pin reading methods
// because timing is very important here and the digitalRead()
// procedure is slower!
//uint8_t IRpin = 2;
// Digital pin #2 is the same as Pin D2 see
// http://arduino.cc/en/Hacking/PinMapping168 for the 'raw' pin mapping
#define IRpin_PIN      PIND
#define IRpin          2

// the maximum pulse we'll listen for - 65 milliseconds is a long time
#define MAXPULSE 65000

// what our timing resolution should be, larger is better
// as its more 'precise' - but too large and you wont get
// accurate timing
#define RESOLUTION 20 

// we will store up to 100 pulse pairs (this is -a lot-)
uint16_t pulses[100][2];  // pair is high and low pulse 
uint8_t currentpulse = 0; // index for pulses we're storing

void setup(void) {
  Serial.begin(9600);
  Serial.println("Ready to decode IR!");
}

void loop(void) {
  uint16_t highpulse, lowpulse;  // temporary storage timing
  highpulse = lowpulse = 0; // start out with no pulse length


//  while (digitalRead(IRpin)) { // this is too slow!
    while (IRpin_PIN & (1 << IRpin)) {
     // pin is still HIGH

     // count off another few microseconds
     highpulse++;
     delayMicroseconds(RESOLUTION);

     // If the pulse is too long, we 'timed out' - either nothing
     // was received or the code is finished, so print what
     // we've grabbed so far, and then reset
     if ((highpulse >= MAXPULSE) && (currentpulse != 0)) {
       printpulses();
       currentpulse=0;
       return;
     }
  }
  // we didn't time out so lets stash the reading
  pulses[currentpulse][0] = highpulse;

  // same as above
  while (! (IRpin_PIN & _BV(IRpin))) {
     // pin is still LOW
     lowpulse++;
     delayMicroseconds(RESOLUTION);
     if ((lowpulse >= MAXPULSE)  && (currentpulse != 0)) {
       printpulses();
       currentpulse=0;
       return;
     }
  }
  pulses[currentpulse][1] = lowpulse;

  // we read one high-low pulse successfully, continue!
  currentpulse++;
}

void printpulses(void) {
  Serial.println("\n\r\n\rReceived: \n\rOFF \tON");
  for (uint8_t i = 0; i < currentpulse; i++) {
    Serial.print(pulses[i][0] * RESOLUTION, DEC);
    Serial.print(" usec, ");
    Serial.print(pulses[i][1] * RESOLUTION, DEC);
    Serial.println(" usec");
  }
}

Arduino红外传感器 - 低范围

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