AIMELIAE GP2Y0A21YK0F GP2Y0A21 GP2Y0A02YK0F 2-15/4-30/4-50/10-80/20-150CM Infrared Proximity Distance Sensor (GP2Y0A41SK0F 4-30CM)

The Sharp GP2Y0A21YK0F GP2Y0A21 10~80cm Infrared Proximity Distance Sensor GP2Y0A51SK0F 2-15CM is a cheap and effective way of measuring distance for projects. It comes with an output of analog voltage ranging from 0 to 3.3V which can link up with micro ADC. However, linearizing the analog voltage output from the sensor is essential. One can easily find the equation online to derive a better result. The sensor is easy to use and point towards a larger reflective surface to get better precision. Although some customers had issues with getting the reading inside the specified range, generally speaking, this product is as advertised and performs well within the range. One should avoid going outside of the specified range as it can cause false triggering.