9. Crash Sensor

9.1. Introduction

Crash Sensor is a sensor module based on crash components.

../_images/05008_01.png

9.2. Characteristic


  • Designed in RJ11 connections, easy to plug.

9.3. Specification


Item Parameter
SKU EF05008
Connection RJ11
Type of Connection Digital output
Working Voltage 3.3V

9.4. Outlook


../_images/05008_02.png

9.5. Quick to Start


Materials Required and Diagram


  • Connect the Crash sensor to J1 port and the LED to J2 port in the Nezha expansion board as the picture shows.

../_images/05008_03.png

9.6. MakeCode Programming


Step 1

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

../_images/05001_04.png

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

../_images/05001_05.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

Code as below:

../_images/05008_06.png

Result

  • The LED lights on if the crash switch was pressed or it lights off.

9.7. Python Programming


Step 1

Download the package and unzip it: PlanetX_MicroPython

Go to Python editor

../_images/05001_072.png

We need to add enum.py and crash.py for programming. Click “Load/Save” and then click “Show Files (1)” to see more choices, click “Add file” to add enum.py and crash.py from the unzipped package of PlanetX_MicroPython.

../_images/05001_081.png ../_images/05001_091.png ../_images/05008_10.png

Step 2

Reference

from microbit import *
from enum import *
from crash import *
crash = CRASH(J1)

while True:
    button = crash.crash_is_pressed()
    if(button == True):
        display.show(Image.HAPPY)
    else:
        display.show(Image.SAD)

Result

  • A smile face displays on the micro:bit while the crash switch being pressed or the micro:bit displays a sad face.

9.8. Relevant File


9.9. Technique File