With all of the hardware you're running, make sure to consider where you are pulling power from. For example I don't think the arduino being powered via USB can provide enough power to drive one of the 8-channel relay boards through the 5v rail. If you consider the LCD, and Ethernet shield as well you would be better off using a standalone power supply to ensure you don't stress the on board regulator. I doubt you want to buy a new one 5 minutes after you get everything connected up.
|