Sharp Infrared Distance Sensor 2Y0A21

With this infrared distance sensor from Sharp, you can measure distances within the range of 10 to 80cm. Due to its small size and fast measurement times, the infrared sensor is perfect for robot projects where you want to dodge obstacles. The analog output can be easily evaluated on an Arduino. There, a voltage of 3.1 V corresponds to 10cm and falls proportionally to 0.3 V at 80cm. The distance can be easily calculated using the following formula: Distance (cm) = (3027.4 / AnalogValue)^1.2134. To achieve as precise values as possible, you should calibrate the sensor by taking comparison measurements before use. In our online shop, you can also buy many other components for your Arduino projects, just take a look around!

If you have any questions or problems with the control, or have suggestions for the product description, simply send us an email or use the rating function. We are happy to help.

Connections:

Red = +5V
Black = GND
Yellow = Analog Voltage (3.1V to 0.3V)

Downloads:

Sharp_2Y0A21_Datasheet.pdf

Arduino UNO Code Example

int AnalogValue;
int Distance;

void setup() {
     Serial.begin(9600);
}

void loop() {
     AnalogValue=analogRead(0);
     Distance=pow((3027.4/AnalogValue), 1.2134);
     Serial.println(Distance);
     delay(100);
}