i bought a couple of IR emitter detector pairs for my line follower project.
i was told that they were a pair of matched TIL31 TIL81 emitter sensors.
on checking the datasheet i found that the detector is supposed to have 3 pins whereas mine has only two.
the IR emitter works fine but there is no change in the sensor whatsoever .
neither potential that is developed or change in resistance ..
i am implementing the attached circuit but it does not work as it is supposed to.
help.
i was told that they were a pair of matched TIL31 TIL81 emitter sensors.
on checking the datasheet i found that the detector is supposed to have 3 pins whereas mine has only two.
the IR emitter works fine but there is no change in the sensor whatsoever .
neither potential that is developed or change in resistance ..
i am implementing the attached circuit but it does not work as it is supposed to.
help.