This program requires a BBC Micro:bit wired with the following:

1. An external normally-open button that, when pressed, routes VCC to pin 0.
2. A distance sensor (RCWL-1602 recommended) with trigger on pin 1 and echo on pin 2.

To use, point the distance sensor at something that is leaving (such as someone running away from you) or approaching (such as someone running toward you, or at a wall you are walking toward. Hit the external button to take a speed reading.

The speed in miles per hour will display on the microbit's LED display.

After taking a reading, button A on the microbit will show the speed in kilometers per hour. Button B will show the miles per hour again.

Open this page at https://aaroncouts.github.io/microbit_speedometer/

Use as Extension

This repository can be added as an extension in MakeCode.

• open https://makecode.microbit.org/
• click on New Project
• click on Extensions under the gearwheel menu
• search for https://github.com/aaroncouts/microbit_speedometer and import

Edit this project

To edit this repository in MakeCode.

• open https://makecode.microbit.org/
• click on Import then click on Import URL
• paste https://github.com/aaroncouts/microbit_speedometer and click import

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