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Hi, my name is Feras Jarnaz, i'm a student in High Institute of Computer Technology, and i'm working at designing and implementation of glasses for blinds that uses the IR sensor as a detector of obstacles, and i'm confused about the best type in this application, and i'm using the ATMEL AT89C51 as a microcontroller, so if any one have any information about the type of the sensor and how to interface it with the microcontroller, i'll be very thankfull.