i am using arduino mega 2650 with tft shield and 3.2" tft touch screen, i am already done with the software/program, now my problem is the output from the board from A0-A15, the outputs are connected to a relay module which serves as my switch but the output from the arduino cannot make the relay on/off, can you help me from this problem???? thank you in advance, i am hoping for your great replies.