To support loads of widely varying sizes, the PCB supports an optoisolator that switches up to 1 A, a MOSFET that switches up to 2 A, and an on-board relay or SSR that can switch up to 3 A.
relay, power MOSFET, push button, LEDs and motor driver. That same day will be the launch of the multi-lingual Arduino Store. These developments will be a nice addition to the toolset out there ...