Signpost Car

Purpose


  • Control the Cutebot with the AI Lens by recognizing the signpost cards.

Materials required


../../_images/cutebot-16-041.png

Connections:


Steps to install the lithium battery pack:

../../_images/cutebot-step-011.png

Assembly steps for bricks:

Parts list:

../../_images/cutebot-step-021.png

Steps of build-up:

../../_images/cutebot-step-031.png

../../_images/cutebot-step-041.png

../../_images/cutebot-step-051.png

../../_images/cutebot-step-061.png

../../_images/cutebot-step-071.png

../../_images/cutebot-step-081.png

../../_images/cutebot-step-091.png

Connections of the AI Lens:

Connect the RJ11 cable with the AI Lens and the other end in Dupont connection to the circled place in the below picture (make sure you connect to the right connections).

../../_images/cutebot-step-101.png

Tips: the bricks holder here is flexible to be adjusted, we may manually adjust the angles of the AI lens to meet the requirements of the functions that you want to achieve.

Software Platform:


MicroSoft MakeCode

Programming


Step 1

  • Click “Advanced” in the drawer to see more choices.

../../_images/cutebot-pk-13.png

  • We need to add a package for programming. Click “Extensions” in the bottom of the drawer and search with “cutebot” in the dialogue box to download it.

../../_images/cutebot-pk-111.png

We need to add a package for programming the AI lens kit. Click “Extensions” in the bottom of the drawer and search with “https://github.com/elecfreaks/pxt-PlanetX-AI” in the dialogue box to download it.

../../_images/cutebot-pk-121.png

Note: If you met a tip indicating that the codebase will be deleted due to incompatibility, you may continue as the tips say or build a new project in the menu.

Step 2

  • In the “on start” brick, initialize the AI lens and switch the function to the cards recognition mode, set the micro:bit to display the appointed icon.

../../_images/case-17-011.png

  • In the “forever” brick, set to get one image form the AI lens and judge the cards icon on the image. If it reconizes the “forward” icon, we set the speed of the left wheel at the speed of 50% and the right at the same to make the car go forward; if it recognizes a “turn-left” icon, we set the car to turn left for 0.5s at the speed of 30% and then move forward, note the AI Lens has three buffers and we need get three images to clear the buffer after the execution. If it recognizes a “turn-right” icon, we set the car to turn right for 0.5s at the speed of 30% and then move forward. Note the AI Lens has three buffers and we need get three images to clear the buffer after the execution. If it recognizes the “stop” icon, the car stops moving accordingly.

    ../../_images/case-17-021.png

Code

../../_images/case-17-031.png

Link: https://makecode.microbit.org/_1v3bWhet40hr

You may also download it directly below:

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Result


If the AI Lens regognizes the “forward” card, the car moves forward; if it recognizes the “turn-left” card, the car turns left and then goes forward; if it recognizes the “turn-right” card, the car turns right and then goes forward; if it recognizes the “stop” card, the car stops moving.

Exploration


FAQ


Relevant Files