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  1. K

    need direction sensor

    Is there any sensor which detects the direction in which the person is moving? That is it should produce a pulse if the person is moving in one direction and a negative pulse if he moves in the opposite direction..please help
  2. K

    counter

    I'm plannig to do a project that includes counting the number of people entering and leaving the room through one door..For this i want to use 2 light beams simultaneously to count the number of people entering and leaving the room Now if a person enters your room he will pass by beam 1 then...
  3. K

    help with digital clock circuit

    I want to build a digital alarm clock which gives an alarm for a set number of times in a day i.e, we should be able to give any number of input timings for the alarm to ring (like a school bell set at the end of each class). Could someone please help....
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