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Crowtail- Rotary Angle Sensor

Description

Rotary angle sensor for crowduino.The angular range is 300 degrees with a linear change in value. The resistance value is 10k ohms, perfect for crowduino use. This may also be known as a “potentiometer ”.

Model: CT0053RAS

CT0053RAS-01.jpg

Specification

  • Measurement angle range:0-300 degrees
  • Easy to use
  • Crowtail base module
  • Work voltage:4.75v-5.25v
  • Dimensions(mm):21.3(L)x20.0(W)x21.6(H)

Usage

1.Hardware Connection The Rotary angle sensor is connecting to analog port A0 of Crowtail - Base Shield. A LED connecting to D5.

Rotary Angle Sensor11.jpg

2.Download Crowtail__Rotary_Angle_Sensor library for Arduino boards with 16MHz XTAL; Unzip and put it in the libraries file of Arduino IDE by the path: ..\arduino-1.0\libraries;

3. Open the code and upload it into your Arduino board

#define ROTARY_ANGLE_SENSOR A0
#define LED 5//the Crowtial- LED is connected to D5 of Arduino
#define ADC_REF 5//reference voltage of ADC is 5v.If the Vcc switch on the Crowduino
#define Crowtail_VCC 5//VCC of the grove interface is normally 5v
#define FULL_ANGLE 300//full value of the rotary angle is 300 degrees
void setup() 
{
    Serial.begin(9600);
        pinMode(ROTARY_ANGLE_SENSOR, INPUT);
    pinMode(LED,OUTPUT);
}

void loop() 
{
    int degrees=0;
    degrees = getDegree();
    Serial.println("The angle between the mark and the starting position:");
    Serial.println(degrees);    
    int brightness;
    /*The degrees is 0~300, should be converted to be 0~255 to control the*/
    /*brightness of LED                                                   */
    brightness = map(degrees, 0, FULL_ANGLE, 0, 255); 
    analogWrite(LED,brightness); /*The range of brightness is 0~255 */  
    delay(500);
}

/************************************************************************/
/*Function: Get the angle between the mark and the starting position    */  
/*Return:   -int,the range of degrees is 0~300 */
int getDegree()
{
    int sensor_value = analogRead(ROTARY_ANGLE_SENSOR);
    float voltage;
    voltage = (float)sensor_value*ADC_REF/1023;
    float degrees = (voltage*FULL_ANGLE)/Crowtail_VCC;
    return degrees;
}

4. open the serial monitor to observe the change of angle data. And pay attention to the LED's brightness.

123.png

Resource