This is question built purely on impatience. I've just got the Pi 3 and I'm still awaiting any components GPIO related to arrive in the mail, other than this relay shield.
It matches the specifications of this image
I'm keen to start playing with the GPIO and would like to use the shield with the Pi but without any components attached to the shield (so I'm not actually turning anything on).
Will this be ok attached to the Pi without any external power source?