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SEDS Lunabotics - Electrical
I²C Power & Communication Hub
Overview
Designed a modular I²C communication and power distribution hub using a Raspberry Pi and TCA9548A multiplexer to support multiple downstream boards with address isolation and improved bus reliability.
Key Features
- Modular Design: I²C communication and power distribution hub
- Raspberry Pi Integration: Central control using Raspberry Pi
- TCA9548A Multiplexer: Address isolation for multiple devices
- Full PCB Design: Complete schematic and PCB layout in KiCad
- Configurable Power: Jumper-selectable 3.3V/5V power distribution for mixed-voltage peripherals
- Bus Reliability: Configurable pull-ups, reset handling, and bus protection
Technical Details
- Developed full schematic and PCB in KiCad
- Implemented configurable pull-ups and reset handling
- Designed for reliable multi-device I²C operation
- Enabled seamless hardware-software integration with ROS2 drivers and control nodes
- Validated board functionality through hardware bring-up, debugging, and system-level testing
Beacon Board
Overview
The beacon board is a board we will be using for our 3 external UWB beacons to communicate to the 4 UWB beacons on the corners of our robot for triangulation of our robot (to see where our robot is on the field).
Key Features
- UWB Communication: Enables communication between 3 external UWB beacons and 4 UWB beacons on robot corners
- Triangulation System: Provides robot position tracking on the field through UWB beacon triangulation
- Microcontroller Control: Basic microcontroller circuit controlling the UWB beacons
- Battery Rechargeable: LiPo battery powered with recharge capability instead of disposable AA batteries
- Full PCB Design: Complete schematic and PCB layout design
Technical Details
- Designed for UWB beacon communication and triangulation
- Integrated LiPo battery charging circuit
- Microcontroller-based control system for beacon management
- Power management system for efficient battery usage