Waveshare Alphabot2 User Manual page 22

Alphabot2 for micro:bit User Manual
Magnetic Force:
We create a script to show the intensity of magnetic force by bar graph (LEDs)
1. Place plot bar graph of
2. Place magnetic force (uT)
Input->More, than set the max value to 255
3. Download the script to your micro:bit
4. When you first time run the code on micro:bit, it will scroll text "to fill screen" to
tell you that calibration step should be done first. Then you should to fill the LED
screen by tilting the micro:bit. After lighting all the LEDs, a smiley is displayed to
show you that calibration is finished.
5. The expected result is that a few of LEDs are lighted if there are not any magnetic
things, and if you close a speaker
Compass
With accelerometer, we can get the direction of gravity, which is downward.
Magnetometer is influenced by earth's magnetic field, horizontal component of
Most of the speaker have magnet, like speaker of mobile phone
3
block to forever, which is in
block on the bar block, which can be found on
to the micro:bit, more LEDs will be lighted
3
Led package
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