Sub-system: Power Supply

The robot is powered by a rechargeable battery which comes with a charger. Both battery and charger are part of the Tetrix FTC Kit. Battery has a fuse and on/off switch in series with the +V terminal.

The battery has the following specifications:

  • Chemistry: NiMH
  • Cells: 10
  • Voltage: 12V (10V discharged, 13V charged)
  • Current Capacity: 3000 mAh


Battery power is distributed to the rest of the robot through a Power Board. The Power Board supplies power to the Motor Controller directly at 12V and to the Raspberry Pi and aLaMode Boards through a 12V to 5V (1A) switching regulator. An identical switching regulator is used to provide 5V to power the speakers. There is room for adding a third 12V to 5V switching regulator on the Power Board for future power requirements. The 12V to 5V switching regulators were obtained by dis-assembling  two identical car cell phone chargers bought on eBay for about $2 a piece.




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