Smart City Bike Lights

  • Connectivity: Bluetooth Low Energy
  • MCU: Arm Cortex M0 @ 16MHz
  • Memory: 128KB Flash, 16KB RAM
  • Silicon vendor: Nordic Semiconductor
Sector: Transport

Smart City Bike Lights conserve power, but brighten when it’s essential to alert drivers to a cyclist’s presence. Accelerometers monitor various conditions including swerving, sudden braking, road surface condition and falls. City planners are using this data to improve road safety, cycle track planning based on desire lines and reducing surface repair costs.

  • Mbed helped a team of 3 firmware developers release in under a year
  • Leveraged simplicity of Mbed online compiler
  • Light and temperature sensors ignore street lights but illuminate for approaching vehicle
  • Specification:
  • Built using a Nordic NRF51 chipset
  • Local processing handles 800Hz accelerometer, wind, speed, lighting and temperature calculations
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