Sharp GP2Y0A02 F 23 Digital Distance Measuring Sensor
Sharp GP2Y0A02F23 Distance Sensor
Overview
Infrared distance measuring sensor module
Uses triangulation method (IR-based)
Measures distance without physical contact
Compatible with Arduino, ESP32, Raspberry Pi
Working Principle
Emits infrared (IR) beam toward object
Reflected IR light returns to sensor
Internal position-sensitive detector (PSD) calculates angle
Converts angle distance value (analog voltage output)
Less affected by object color compared to simple IR sensors
Key Specifications
Distance Range: 20 cm 150 cm
Operating Voltmption: ~33 mA
Output Type: Analog voltage
Response Type: Continuous distance measurement
Size: ~29.5 13 21.6 mm
Module Components
IR LED (emitter)
Position Sensitive Detector (PSD)
Signal processing circuit
JST connector (3-pin)
Features
Analog output proportional to distance
Better stability than ultrasonic in some cases
Works well in indoor environments
Simple interface with microcontrollers
Compact and lightweight
Applications
Obstacle avoiding robots
Distance measurement systems
Object detection & positioning
Usage Tips
Place 10F capacitor across VCC & GND for stable readings
Avoid direct sunlight (IR interference)
Works best with solid, reflective surfaces
Calibrate voltage distance for accuracy
Advantages
Good alternative to ultrasonic sensors
Stable and consistent readings
Easy analog interface
Reliable for mid-range distance
Limitations
Non-linear output (requires calibration)
Not suitable for very short (<20 cm) distances
Performance affected by surface reflectivity
Limited outdoor performance
Summary
Uses triangulation for accurate measurement
Outputs analog voltage proportional to distance
Ideal for robotics and obstacle detection projects
<150 cm)