ud23
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hi i am controling opto isolater by 89s52 controller port 2 pin number 0.
my problem is when i connect controller input to P2^0 controller p2^0 hav suddne voltage chnge from 5 v to 1v and switching only 1v to 1.5v and if i dont connect opto input to controller pin it switching between 5v to 0v whts the reason for that can any one help me
my problem is when i connect controller input to P2^0 controller p2^0 hav suddne voltage chnge from 5 v to 1v and switching only 1v to 1.5v and if i dont connect opto input to controller pin it switching between 5v to 0v whts the reason for that can any one help me