Hi I'm new to the forum and I have a question about position sensors. I am looking to obtain a position sensor, to be used in the construction of a musical instrument. The sensor will not only sense the presence of my hand in front of it, but will also determine the position of my hand relative to it as a function of time. This data must then be digitized to give a list of position-time values, for input into a software program. The sensor's range should around 1 to 1.5 meters. My first guess would be an infrared sensor for this task, but I have no experience with the technology. I also have a number of other sensors available to me like Hall-effect sensors and light dependant resistors. If anyone has any suggestions or tips on what type or model of sensor is best for this job, I would greatly appreciate the advice. If there is another forum that would be more sutiable for this question then please let me know. Thank you.