If we want to stick to what we seem to know for sure physically and scientifically, then I suppose we can consider humans equal to computers albeit much more parallel and complex. In other words, if we reduce a human to mere electric signals in the nervous system and accept that finally the whole human life derives from that only, then we can eventually build a similar machine ourselves.
If we want to think that a human is merely a physical projection of some greater energy, be it the while universe, gods -- or a single $GOD, if you prefer -- then we definitely can't produce consciousness ourselves. Instead, we would have to wait for, or somehow invite, the greater energy or consciousness itself to find and take presence in the form of a machine that passes electric signals around.