Ideas for Areas to Explore

Quick Draw Duo

  • Add some winning and losing sounds.
  • Use the accelerometer to change the game to one with a physical draw.
  • Find some other uses for a pair of synchronised CPB, e.g.  light shows, stereo/spatial audio playback.
  • Technical challenge 1: increase the robustness of the communication, e.g. make it recover from transient connectivity issues; match request and response with a suitable identifier.
  • Technical challenge 2: understand and set the connection interval for Blutetooth LE GATT transactions and factor this into the design of the board syncronisation process.

Reaction Timer

  • Add a cheat detector to the reaction timer to highlight impossible times and early presses.
  • Use the NeoPixels to show the reaction time graphically.
  • Increase the complexity of the visual (e.g. different colours, odd vs even) and auditory (e.g. different pitches) stimuli to investigate the additional delays from discrimination.
  • Investigate tactile reaction time with some sort of actuator controlled by the CPX/CPB board.
  • Examine any effect of using peripheral vision and lower brightness settings on reaction time.


  • Add an announcement of each time or the fastest time using sound samples for each digit.
  • Independently verify the reaction timing - many smartphones offer high fps video recording in the form of a slow motion mode.

Related Projects

Further Reading


This guide was first published on Jan 20, 2020. It was last updated on Nov 10, 2019.

This page (Going Further) was last updated on Nov 10, 2019.

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