Example Code for micro:bit-Maqueen Mechanic-Loader

Hardware Preparation

• Maqueen Lite x1
• micro:bit V1/V2 x1
• MicroUSB cable x1
• Maqueen Mechanic-Loader x1 (https://www.dfrobot.com/product-2006.html)
• IR Remote Controller x1 (https://www.dfrobot.com.cn/goods-142.html)

Software Preparation

• Programming Platform: makecode
• Libraries: maqueen, neopixel

Wiring Diagram

1. Install the Maqueen Mechanic-Loader as shown in the following figure:
   
2. Plug the servo wires to the port S1 of Maqueen as shown in the figure (brown wire to black pin, red wire to red pin, orange wire to the green pin):
   

Other Preparation Work

1. Load MakeCode Graphical Library for Maqueen as described in the previous example.
2. Prepare a Maqueen Mechanic-Loader (https://www.dfrobot.com/product-2006.html) and an IR remote controller (https://www.dfrobot.com.cn/goods-142.html).

Sample Code

Control Servo

Effect: make the shovel to rotate up and down.

Code URL: https://makecode.microbit.org/_1wHJrqgRYHko

Code File: maqueen14-1.hex

Code Screenshot:

IR Remote Control of the Shovel

Effect: use the IR remote controller to control the shovel rotation angle.

Code URL: https://makecode.microbit.org/_CFMhwL03TK5q

Code File: maqueen14-2.hex

Code Screenshot:

IR Remote Control of the Maqueen Mechanic-Loader

Effect: use the IR remote controller to control the Maqueen car to move and the shovel to rotate up and down.

Code URL: https://makecode.microbit.org/_bkvP19V7a6v8

Code File: maqueen14-3.hex

Code Screenshot:

Result

Control Servo

Turn Maqueen on, then the shovel will turn up and down at 90°.

There are two ways to adjust the starting and ending angles of rotation: 1. Adjust the angle value in the code as your need. 2. Remove the two screws on the servo and turn the servo by hand, then reinstall the screws.

IR Remote Control of the Shovel

Use the IR remote controller to make the shovel rotate up and down by directing it at the IR receiver in the front side of Maqueen and pressing the upper and lower triangle keys.

IR Remote Control of the Maqueen Mechanic-Loader

In this example, keys 2, 8, 4, 6, 5 are used to control Maqueen to move forward, move backward, turn left, turn right and stop; press the upper triangle key to control the shovel to turn up, and press the lower for turning down.

Additional Information

The Maqueen Mechanic-Loader and installation effect are as shown in the following figures: