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Joel Feinstein Austin Buchan Ben Morse Teddy Martin. Actuation Sensitive Car Brake Light Microcontroller Boards with CAN peripherals acquired Wheel and Pedal simulator found Hall effect sensor and magnet specified Looking for ideal LED/reflector assembly Next Steps - PowerPoint PPT Presentation
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Joel FeinsteinAustin Buchan
Ben MorseTeddy Martin
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Status UpdateStatus Update Actuation Sensitive Car Brake Light Microcontroller Boards with CAN peripherals acquired Wheel and Pedal simulator found Hall effect sensor and magnet specified Looking for ideal LED/reflector assembly Next Steps
◦ Acquire sensors and outputs◦ Research CAN/OBD-II protocols and vehicle idiosyncrasies◦ Flesh out feature list for adaptive learning/instructive behavior
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ArchitectureArchitecture Simple data
producer – data consumer model
LED-Side microntroller handles all state and data manipulation
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Use CasesUse Cases Regular Braking
◦ Mapping from brake-off to brake-full-on◦ Brake light will grow from center, increasing in
size and intensity◦ Adaptive learning to scale the brake light output
based on a users brake usage profile “Back Off” Mode
◦ A sequence of taps on the brake will flash the brake light for a few seconds alerting a driver behind you to increase following distance
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Risks & MitigationRisk MitigationHall effect sensor ineffective Use potentiometer
CAN communication not high enough bandwidth/too complicated to interface with
Replace CAN bus with 485 serial line between sensor and controller
Loss of connection between sensor and controller
Timeout fail-safe for brake light
Noisy sensor data Hardware and/or software filter