The Resistors

Me En 495R Mechatronics Competition, Brigham Young University

Power Supply

The power supply distributes power to all of the components and subsystems on the robot. For our power source we chose to use a 3-cell lithium polymer (LiPo) battery, which has a nominal voltage of 11.1V but that actually operates around 12V on a full charge.

To obtain the 3V3 and 5V0 power supply rails needed to power many of the components on the robot, we designed a board that uses two linear voltage regulators to output these voltages. The board also distributes the 12V power supply and provides a common ground for all components on the robot.

The board also includes power indicator LEDs, filtering capacitors, a fuse for safety, and a power switch for turning the robot on and off. The schematic for the board and a photo of the finished board and battery mounted on the robot are shown below.

Power supply board schematic
Power supply board and battery mounted on the robot