Bricks and Bricklets can be powered by the USB connector of the Brick. Stacks can also be powered by the master of the stack over its USB connection. This option is limited by the USB specification to 500mA. A large stack may need more power.
To provide greater currents, Power Supplies are available. These modules power the stack and can additionally be used to supply the power for driver Bricks (e.g. the DC Brick). Power Supplies have the same size as Bricks and are stacked in at the bottom of the stack.
|Step-Down||Powers a stack of Bricks with 5V|