Hi
I just connected a mosfet power controller
robotshop.com/ca/en/mosfet-power-controller.html
to an arduino uno.
It looks like only 1 wire is needed to control it from the arduino. So we connected the arduino via the yellow wire to the side marked " IN". Tried both the + and - .
Problem is that the power stays on any way and we cannot shut it off.
My son has a 6V lantern battery powering a small Dc fan connected via the red and black wires.
Are we connecting it properly ??