3.2.2 Swaying Boat

3.2.2.1 Overview

Here we build a swaying boat with a Micro:bit V2 board, a servo expansion board, a 360° LEGO servo and some LEGO parts. We program to control the boat to perform some movements through the Micro:bit V2 buttons A, B and A+B.

3.2.2.2 Materials Required

3.2.2.3 Installation Steps

3.2.2.4 Test Code

⚠️ Special reminder: You can obtain the sample code through the following two methods.

Method 1: drag and drop code blocks to build the sample code

1. MakeCode programming environment

The online version of MakeCode: MakeCode editor

2. MakeCode extension library

⚠️ Special reminder: Copy and paste the link: https://github.com/keyestudio2019/pxt-creative-inventors-kit-master.git into the search box to import the library.

3. Write the sample code

Method 2: download the sample code file directly

1. Download the code file

Click to download the code file: 3_3_2_Swaying_Boat

2. MakeCode programming environment

The online version of MakeCode: MakeCode editor

3. Load the sample code

Drag and drop the sample code to the MakeCode editor.

3.2.2.5 Test Result

Wire up and power on through micro USB cable, and connect an external power source (four AAA-1.5V batteries installed in the battery box, ensuring sufficient power).

To download the sample code using an online browser, you need to send the downloaded “.hex” file to the Micro:bit V2 board. There are two ways as follows:

① Download through WebUSB

For browsers like Google Chrome / Microsoft Edge, you need to click “Connect Device” to pair the device first. After that, click “Download” to load the sample code to the Micro:bit V2 board.

② Download without WebUSB

For browsers like Safari / Firefox / Other, download and send the sample code to the Micro:bit V2 board.

After downloading the sample code, unplug the Micro USB cable to the Micro:bit V2 board.

Turn the DIP switched to the RGB and ON.

Press button A on the Micro:bit V2 board and release it, the swaying boat glides forward, these SK6812 RGB LEDs emit red light, and the 5×5 LED matrix displays .

Press button B on the Micro:bit V2 board and release it, the swaying boat glides backward, these SK6812 RGB LEDs emit orange light, and the 5×5 LED matrix displays .

Press button A and B on the Micro:bit V2 board simultaneously and release them, the swaying boat stops, and these SK6812 RGB LEDs and the 5×5 LED matrix turn off.