The Sharp Distance Sensor 2y0a21 is wide angel distance measuring sensor with accurate measurment used for many DIY projects. It has an analog output that varies from 3.1V at 10cm to 0.4V at 80cm. It can be used for touch less switch, DIY robots. It is united with PSD infrared LED and signal processing circuit. The voltage output in this device is corresponding to the detection distance.
