Have a question about Arduino? Ask me!

I am completley new to the arduino, dont even have one yet, but eager to start soon. one question that i have, and it's mostly software related. Using the arduino uno with a ethershield, can data from a weather station be uploaded to wunderground.com as personal weather station data? Here is the pws upload protocol...

http://wiki.wunderground.com/index.php/PWS_-_Upload_Protocol

Like i said, i am really new to the arduino, but have been working with the propeller for quite awhile, so i think my transition will be fairly painless. is there code examples that would show me how to do this? Thanks in advance!

Hi Jeremy,

Am building an automatic railway gate control and track switching using the arduino Uno.

Need help with programming an IR transmitter and receiver circuit to send a signal to a stepper motor when there is a interruption between the transmitter and receiver allowing the stepper motor to rotate in particular direction and retrun to the intial state after some seconds. During this process, an LED will switch to red to prevent motorist from crossing the railway.

I already have a canakit stepper motor and easy driver stepper motor.

Thanks.

Hi Jeremy,

Am building an automatic railway gate control and track switching using the arduino Uno.

Need help with programming an IR transmitter and receiver circuit to send a signal to a stepper motor when there is a interruption between the transmitter and receiver allowing the stepper motor to rotate in particular direction and retrun to the intial state after some seconds. During this process, an LED will switch to red to prevent motorist from crossing the railway.

I already have a canakit stepper motor and easy driver stepper motor.

Thanks.

//define pins. I used pins 4 and 5

#define irLedPin 4          // IR Led on this pin

#define irSensorPin 5       // IR sensor on this pin

int irRead(int readPin, int triggerPin); //function prototype

void setup()

{

  pinMode(irSensorPin, INPUT);

  pinMode(irLedPin, OUTPUT);

  Serial.begin(9600);

  // prints title with ending line break

  Serial.println("Program Starting");

  // wait for the long string to be sent

  delay(100);

}

void loop()

{ 

              //  call a StreetLights() function here if you wish

                   // or at end of the setup()

  if (irRead(irSensorPin, irLedPin))=0

  {

     lowerCrossingGate();

  }

}

void lowerCrossingGate()

{

                         // turn on traffic light code here

                        //  put motor control code here

               //  here is a tutorial for steppers that may help you:

               //  http://www.arduino.cc/en/Tutorial/StepperUnipolar

                         // turn off traffic light after motor position reversed

}

/******************************************************************************

* This function can be used with a panasonic pna4602m ir sensor

* it returns a zero if something is detected by the sensor, and a 1 otherwise

* The function bit bangs a 38.5khZ waveform to an IR led connected to the

* triggerPin for 1 millisecond, and then reads the IR sensor pin to see if

* the reflected IR has been detected

******************************************************************************/

int irRead(int readPin, int triggerPin)

{

  int halfPeriod = 13; //one period at 38.5khZ is aproximately 26 microseconds

  int cycles = 38; //26 microseconds * 38 is more or less 1 millisecond

  int i;

  for (i=0; i <=cycles; i++)

  {

    digitalWrite(triggerPin, HIGH);

    delayMicroseconds(halfPeriod);

    digitalWrite(triggerPin, LOW);

    delayMicroseconds(halfPeriod - 1);     // - 1 to make up for digitaWrite overhead   

  }

  return digitalRead(readPin);

}

Modified from original Source:  http://www.arduino.cc/playground/Main/PanasonicIrSensor

-= Syntax Matters =-

Thanks. I'll try this out.