The Prop Shield is meant interactive light and sound effects on small handheld props and wearable costumes.

• Motion Sensors - Allows motion interactive light & sound.
• Audio Amplifier - Clear quality audio output to a small speaker.
• Fast LED Driver - Drive APA102 / Dotstar LEDs for colorful lighting with rapid response.
• Flash Memory - 8 Mbyte storage for images, sound clips, and data logging.

Motion Sensors

Sensor fusion: NXPSensorFusion or Madgwick or Mahony

magnetic calibration application

how to calibrate accelerometer and gyroscope

Audio Amplifier

must write pin 5 high to turn on amplifier (how long to wait for powerup?)

how to use audio lib examples

DAC reference, 1.2 vs 3.3

Fast LED Driver

FastLED example

must write pin 7 high to talk to LEDs

use SPI transaction functions if playing audio from serial flash

recommendation on current through PCB vs dedicated wires

Using 24 vs 12 MHz SPI speed

Flash Memory

Technical Details