How to use a transistor with arduino

Forum 2005-2010 (read only) General Frequently-Asked Questions
4

So would this be ok?
I want to count the number of pulses in a second. Is there a better way? If im going to have multiple things in the main loop is that the right way of doing it or should i use interupts? I'm very new to this . Thanks Rob

//////////////////////////////////////////////////
/////////////////START UP CODE////////////////////
//////////////////////////////////////////////////

int latchPin = 8; //Latch pin declare
int clockPin = 12; //Clock pin declare
int dataPin = 11; //Data pin declare
int rpmpulseinput = 1; //RPM input declare
int pulsesdetected = 0; //RPM counted

void setup() {
  //start com with (serial)
  Serial.begin(96000);
  Serial.println("Arduino Connected to M1330 via USB");
  //Connect to shift register IC
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(rpmpulseinput, INPUT);      
  // sets the digital pin as input
  digitalWrite(rpmpulseinput, HIGH);  
  // turns on the internal pull up
  //Output test of IC  
}


//////////////////////////////////////////////////
///////////////////MAIN CODE//////////////////////
//////////////////////////////////////////////////

int pulseread(){
  if (digitalRead(rpmpulseinput) == LOW) {
  pulsesdetected=pulsesdetected+1;
}
}



void loop()
{
  pulseread();
//DO OTHER THINGS
//MORE OTHER THINGS  :)
}




//////////////////////////////////////////////////
////////////////////END OF CODE///////////////////
//////////////////////////////////////////////////