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Sharp GP2Y0A02YK0F Analog Distance Sensor

K-TECHNICS
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KSh1,200.00

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The Sharp GP2Y0A02YK0F is a long-range optical distance sensor that measures distances from 20 cm to 150 cm (8" to 60"). It utilizes an integrated combination of an infrared emitting diode (IRED), a position-sensitive detector (PSD), and a signal processing circuit to calculate distance through triangulation. Because it uses the triangulation method, its readings are minimally affected by the object's reflectivity, operating temperature, or duration of operation. 
Technical Specifications
  • Operating Voltage: 4.5 V to 5.5 V
  • Average Current Consumption: 33 mA typical (Note: It draws current in large, short bursts)
  • Output Type: Analog voltage (0.4 V at 150 cm up to approximately 2.8 V at 20 cm)
  • Response/Update Time: 38 ± 10 ms
  • Dimensions: 29.5 × 13.0 × 21.6 mm
Pinout and Connection
The sensor features a 3-pin JST PH connector interface. Looking at the back of the sensor case, the pins typically align as follows: 
  1. VCC: Connect to +5V power source.
  2. GND: Connect to system ground.
  3. Vo (Output): Connect to an Analog Input pin on your microcontroller (e.g., Arduino A0). 
⚠️ Hardware Tip: Because the sensor draws current in massive, quick spikes during its internal IR pulses, the manufacturer strongly recommends placing a 10 μF or larger bypass capacitor across the VCC and GND lines close to the sensor. This stabilizes the power supply line and eliminates noise spikes in your readings.
Non-Linear Output Behavior
The output voltage of this sensor is non-linear and inversely proportional to the distance. 
  • If an object gets closer than 20 cm, the voltage curve drops back down. A distance of 10 cm might look exactly like 80 cm to the microcontroller. Ensure your project keeps obstacles at least 20 cm away. 
  • Linearizing Data: To map voltage to an actual distance in centimeters, you cannot use a simple linear function like Arduino's map(). The relationship is roughly linear when relating the output voltage (V) to the inverse of the distance (1/Distance)

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