Joel Feinstein

1

• Joel Feinstein
• Austin Buchan
• Ben Morse
• Teddy Martin

2
Status 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

3
Architecture

• Simple data producer data consumer model
• LED-Side microntroller handles all state and data
  manipulation

4
Use 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

5
Risks Mitigation
Risk Mitigation
Hall 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