7NeoPixel Compass
In this chapter we’ll use a three-axis sensor and an RGB LED ring to create a compass that indicates north by lighting the LEDs in that direction.
PARTS REQUIRED
Arduino board
Jumper wires
HMC5883L three-axis sensor
Adafruit NeoPixel ring with 16 RGB LEDs
9V battery pack with 6 AA batteries
LIBRARIES REQUIRED
Wire
FastLED
HMC5883L
HOW IT WORKS
The HMC5883L three-axis sensor (Figure 7-1) is a multichip module that senses magnetic force. The module measures both the direction and the magnitude of Earth’s magnetic fields. We will ...
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