Difference between revisions of "SHARP IR Ranger Sensor GP2D12 for Arduino"

Revision as of 02:07, 25 May 2012

Introduction

The Sharp GP2D12 is an analog distance sensor that uses infrared to detect an object between 10 cm and 80 cm away. The GP2D12 provides a non-linear voltage output in relation to the distance an object is from the sensor and interfaces easily using any analog to digital converter.

Specification

• Measuring range : 10 to 80 cm
• The maximum allowable Angle : > 40 °
• The power supply voltage : 4.5 to 5.5 V
• The average power consumption : 35 mA
• Peak power consumption : about 200 mA
• The frequency of updates/cycle : 25 Hz/40 ms
• Analog output noise : < 200 mV

Document

SHARP GPD2D12 datasheet

Pinout

Usage

Here is the guide illustrates how to connect an Arduino to the ADXL335 breakout board.

Example code

char GP2D12;
char a,b;
void setup()
{
 Serial.begin(9600); //
}
void loop()
{
 int val;
 GP2D12=read_gp2d12_range(0);
 a=GP2D12/10;
 b=GP2D12%10;
 val=a*10+b;
 if(val>10&&val<80)
 {
   Serial.print(a,DEC);//
   Serial.print(b,DEC);//
   Serial.println("cm");//
 }
 else Serial.println("over");//
 delay(50);
}
float read_gp2d12_range(byte pin)
{
 int tmp;
 tmp = analogRead(pin);
 if (tmp < 3)return -1;
 return (6787.0 /((float)tmp - 3.0)) - 4.0;
}

How to buy

Click here to buy SHARP IR Ranger Sensor GP2D12