Pid based line following robot with pololu qtr 8rcsensor. Users guide for the qtr8a reflectance sensor array. Before going on to the building of the robot,we need to under. The module is a convenient carrier for eight ir emitter and receiver phototransistor pairs evenly spaced at intervals of 0. Pololu qtr reflectance sensor application note printable pdf information about using the pololu qtr reflectance sensors, including differences between atype and rctype sensors and sample oscilloscope screen captures of sensor outputs. Qtr8a reflectance sensor array australia core electronics. Pdf arduino library for the pololu qtr reflectance. Pololu qtr8a and qtr8rc reflectance sensor array user.
These outputs are analog voltages ranging from 0 v to vcc which must be between 3. Pololu corporation qtr8rc reflectance sensor array sensor. It prints the sensor values to the serial monitor as numbers from 0 maximum reflectance to minimum reflectance followed by the estimated location of the line as a number from 0 to 5000. The qtr8rc reflectance sensor array is intended as a line sensor, but it can be used as a generalpurpose proximity or reflectance sensor.
The qtr8a reflectance sensor array is intended as a line sensor, but it can be used as a generalpurpose proximity or reflectance sensor. Qtr8a sensor outputs the qtr8a reflectance sensor array has eight distinct sensor outputs, one from each ledphototransistor pair. Arduino library for the pololu qtr reflectance sensors. The outputs are all independent, but the leds are arranged in pairs to halve current consumption. How to program a qtr8rc reflectance sensor array youtube.
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