Hey everyone,
I just got a motor shield Rev 3 to use with my Arduino Uno that I bought a year or so ago. There seems to be more pins on the shield than there are sockets for on the Uno. What are these extra pins for, and can I use this with my Uno or not? See attached image where I have circled the extra pins on the shield.
Chris
There's some extra pins for IOREF (for future boards with 3.3V logic) and SDA/SCL (which are in different places on old Arduino's and old Megas - thus the new pinout unifies the Uno and Mega). Just ignore the extra pins if the shield doesn't have them.
The extra pins are on the motor shield, not the Uno. The Uno has no matching sockets for the circled pins on the shield to plug in to. I assume your statement still holds true though?
Those 2 pins are duplicate SCL/SDA pins. They are the same as A4/A5.
Thanks everyone for your input. Given what has been said, I will assume the answer to my question "can I use this with my Uno or not", is Yes.
yes, as long as the pins hanging down are not touching anything.
