Datasheet

Start by putting the PCB in front of you with the text as

shown on the left. Then place the header on top.

For the classic cobbler: THERE IS A NOTCH IN THE

HEADER MAKE SURE ITS RIGHT NEXT TO THE PIN

LABELED #21!

For the T-cobbler: THERE IS A NOTCH IN THE HEADER

MAKE SURE ITS RIGHT NEXT TO TWO HOLES AT THE

T JUNCTION

Its really important to line up the header right, because

otherwise the pins will be reversed, making the cobbler

useless