Hey thx nigel
I've actually refered to ur tutorial for LED Matrix multiplexing and i must say it was truly very helpful
(though i'm not coding mine in assembly language)
BTW, I've tried putting a diode at the output, but theres no difference with the original output, which is fixed output (at about 2 to 2.5V DC).
ALso, there's this dat i i'm quite confused about...is the output an oscillating wave or a constant DC voltage? coz if it is oscillating then the value read by the ADC will juz keep varying isnt it ?