Script and Tests

Script: accelerometer_servo_points_up

• Connect your micro:bit module to your computer with its USB cable.
• In Google Chrome or Microsoft Edge browser, open the micro:bit Python Editor. 
• Set the project name field to accelerometer_servo_points_up, enter the script below, and click Save. 
  (See Save & Edit Scripts.)  
• Click Send to micro:bit.
  (See Flash Scripts with Python Editor.)

# accelerometer_servo_points_up

from microbit import *
import math

while True:
    x = accelerometer.get_x()
    y = accelerometer.get_y()
    
    angle = round( math.degrees( math.atan2(y, x) ) )

    needle = ( angle - 90 + 15 ) // 30
    display.show(Image.ALL_CLOCKS[needle])
    
    if angle >= 0:
        angle = 180 - angle
    else:
        continue

    value = 0.5689 * angle + 25.6

    pin16.write_analog(value)

Tests

It’s time to verify that your micro:bit LED matrix and servo behavior resemble what’s shown in the animation.

• Hold the breadboard vertical, like it’s a car’s steering wheel.
• Rotate it like in the animation. (See the .mp4 version here.)
• Verify that the servo points upward as you rotate the micro:bit and servo through the 180° range.
• Verify that the LEDs on the micro:bit LED matrix also point up as the micro:bit and servo are rotated