... voltage input options Device Overview:The design of the MU521 is based on the US-T28 transceiver module ... 8-pin connector at the solder side of the MU521 board is shown below. This connector is designed ... device which provides power and signals to the MU521 module.The MU521 provides a LDO component for higher voltage ... sensor is able to give +3V DC to the MU521 module, the LDO can be bypassed, or removed ...