Quick Maker Project - Counting down 20s while you wash your hands with Circuit Playground Express

20s countdown timer maker project banner

Everyone has a wee song to sing to while washing your hands for 20 seconds, since I had Adafruit's Circuit Playground Express handy, why not create a visual countdown.

👉 You will need:

🧐 Why did I choose Adafruit's Circuit Playground Express?

I had one around and I wanted to put something useful on it, plus I want to play a little more with CircuitPython. The CPX has 10 bright LEDS (Neopixels) so perfect for the 20 second countdown.

It also has a "Microphone Audio Sensor" so it can pick up sounds. And there's already code handily written on detecting sound via Adafruit's Sound example.

ℹī¸ More info about CPX

All the elements are there, so let's get started! đŸ’Ē

🤔 What I wanted to do

📸 Some pics

The CPX I have with and without the case

Adafruit's Circuit Playground Express

Adafruit's Circuit Playground Express

Adafruit's Circuit Playground Express

🎉 Result

20s countdown for washing your hands with Circuit Playground Express

đŸ“Ŋ Here's a video of it working, my hands were sore from clapping while testing so I tapped it loudly on the casing which registers the sound as well. 😊

20s countdown for washing your hands with Circuit Playground Express

ℹī¸ Source code for project

Here's the code on github: https://github.com/whykay/cpx_clap_wash

About Author

Vicky Twomey-Lee

Pythonista, but normally found organising various tech events, and now heavily involved in diversity initiatives like Coding Grace, PyLadies Dublin, and Women in Technology and Science (WITS Ireland).
👉 http://about.me/whykay

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