Hi all, Could somebody please help me with this.....
i have 6 input lines all held at 3v going into portb of my pic, - and these 3v inputs have a different power source and ground from the pic circuit. The problem is i only want to address one input at a time, but they all all held at 3v - which i cant change.
I was wondering if i could somehow sink this current via the pic. I've read on the data sheet you can enable pull up resistors on portb using the option register, but from there im abit lost. what i really want to know is - is there anyway to pull an input signal to ground?
thanks in advance for any replies.
i have 6 input lines all held at 3v going into portb of my pic, - and these 3v inputs have a different power source and ground from the pic circuit. The problem is i only want to address one input at a time, but they all all held at 3v - which i cant change.
I was wondering if i could somehow sink this current via the pic. I've read on the data sheet you can enable pull up resistors on portb using the option register, but from there im abit lost. what i really want to know is - is there anyway to pull an input signal to ground?
thanks in advance for any replies.
Last edited: