Joel FeinsteinAustin Buchan

Ben MorseTeddy Martin

1

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

2

ArchitectureArchitecture Simple data

producer – data consumer model

LED-Side microntroller handles all state and data manipulation

3

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

4

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