I came to know that PI technology uses -
1 a pulse to coil to form the magnetism in coil and the the object to be checked.
2 an opposite pulse to make the magnetism in the coil to die
3 then measuring of the amplitude of magnetism in the object by the same coil.
if so and i am not mistaken,
an analog write in some positive value,then an analog write in same value in negetive.now an analog read will give the system working.
i am a newbie,so pls help me.
