I have an Arduino Nano wired up to a MOSFET and my multimeter shows me the voltage going up and down, however when I attach a motor to it, it struggles to do one rotation. When I have a LiPo attached to the MOSFET with the Arduino still giving values to the Ground, I no longer get a varying voltage output, but the full voltage of the power.
Any reason this would happen? As soon as I change it to the 5V rail from the Arduino everything is nice and good again. Odd!