Starter Guide

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Lesson 19 Servo
Introduction
In this lesson, let’s know something about the rotation angle of the servo.
What is servo：
The servo motor has three wires: power, ground, and signal. The power
wire is typically red, and should be connected to the 3.3V pin on the Microbit
board. The ground wire is typically black or brown and should be connected
to a ground pin on the Microbit board. The signal pin is typically yellow,
orange or white and should be connected to a digital pin on the Microbit
board. Note that the servo motor draw considerable power, if the servos
rotates stiffly, you'll probably need to power them from a separate supply
(i.e. not the +3.3Vpin on your Microbit). Be sure to connect the grounds of
the Microbit and external power supply together.
Operating steps
1. First, we need to prepare the following experimental materials:
1 * microbit
1 * microbit expansion board
1 * USB cable
1 * servo
- Several Jumper wires
2. Connect the servo to the micro:bit.
connection diagram：