GP2Y0A51SK0F is a distance measuring sensor unit, composed of an integrated combination of PSD (position sensitive detector) , IR-LED (infrared emitting diode) and signal processing circuit. The variety of the reflectivity of the object, the environmental temperature and the operating duration are not influenced easily to the distance detection because of adopting the triangulation method. This device outputs the voltage corresponding to the detection distance. So this sensor can also be used as a proximity sensor
360度雷射光掃描儀開發套件（RPLIDAR）是開發出低成本的360度2D激光掃描儀（LIDAR）解決方案。該系統可以在6米範圍內執行360度掃描。LIDAR stands for Light detection and Ranging .This tool is used for remote sensing to check the distance using laser technology. This 360 Degree Laser Scanner Development Kit (RPLIDAR) is a low cost 360 degree 2D laser scanner (LIDAR) solution developed. The system can perform 360 degree scan within 6 meter range.