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.

Both

• 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

• Circuit Playground Quick Draw - the original project that this one is based on.
• Color Remote with Circuit Playground Bluefruit and Circuit Playground Bluefruit NeoPixel Animation and Color Remote Control - two other projects showing Bluetooth communication between two CPB boards.
• De Montfort University Leicester: CTEC1802 Arduino lab work: reaction timers.
• BBC Bitesize: Coordination and control - The nervous system: Investigating human reaction times - this is the remarkably simple but effective "ruler drop test".
• Reaction! game in MakeCode for CPX.
• Reaction Time game in MakeCode for BBC micro:bit.

Further Reading

• Introduction to Bluetooth Low Energy
• MagicLight Bulb Color Mixer with Circuit Playground Bluefruit: Understanding BLE
• All the Internet of Things - Epsiode One: Bluetooth & BTLE
• Nordic Semiconductor: Wireless timer synchronization among nRF5 devices - an interesting, very low-level approach in C for synchonising devices accurately.
• Timothy Jordan: Characteristics of Visual and Proprioceptive Response Times in the Learning of a Motor Skill. 1972. - discussed on ResearchGate: Questions: Do you react faster to a haptic stimulus than to a visual one?
• Simon Thorpe, Michele Fabre-Thorpe: Seeking Categories in the Brain. 2001.
• Espen Tonnessen, Thomas Haugen, Shaher A.I. Shalfawi: Reaction Time Aspects of Elite Sprinters In Athletics World Championships. 2013.