Did you get an instruction sheet with it? If not, can you post a link to the seller's page or the brand name and part number? Be very careful that the 9V from the power supply does not get through to Arduino input pins.
Did you get an instruction sheet with it? If not, can you post a link to the seller's page or the brand name and part number? Be very careful that the 9V from the power supply does not get through to Arduino input pins.