Rock64 Power Supply Polarity

[nmhart322]

Have just got a Rock64, not with the power supply though, so have picked a suitable one up from my
local electronics store. Does anyone know what the power supply pin polarity should be ?

hi,  the polarity of the Rock64 power supply is  +5v center,   ground sleeve.

So there are three pins on the barrel jack connecting it to the board. The center of the barrel jack is the rightmost pin if looking into the jack. The center pin contacts the sleeve of the barrel jack, so does that mean this pin is the ground pin? In that case, where is the -5V pin?