Covid-19 Hand Wash Timer - 20 Seconds

Introduction: Covid-19 Hand Wash Timer - 20 Seconds

About: Retired teacher of computing - started 1967 with FORTRAN IV. I now play with development boards such as Raspberry PI, Pico, Arduino, micro:bit and Adafruit CircuitPython boards like the Insybitsy M4 and Circui…

Have you got either if these sitting around doing nothing? It's good to use as a hands free 20 second hand wash timer as you soap up and remove the virus.

All you need to get this project up and running are:

  • Mu editor
  • An Adafruit CircuitPlayground Express or Bluefruit
  • USB cable
  • USB 5V power plug
  • Blu Tack or similar

Step 1: First the Bluefruit

This is the easy one.

Just copy the code, paste it into the Mu editor and flash it to your Adafruit CircuitPlayground Bluefruit.

Clap your hand loudly near the CPB and all the LEDs will turn red. As the seconds tick away the LEDs change first to yellow and then to green. When the 20 seconds are over all the LEDs flash and bleep so its time to rinse.

After testing use Blu Tack to place the CPB near the sink and power from the wallwart.

It's always on and you do not need to touch it.

Step 2: Now the Express

This one is far more complicated. The mic on this board is much harder to use to identify a clap of the hands but Adafruit supply some modifiable code which has been included.

Just copy the code, paste it into the Mu editor and flash it to your Adafruit CircuitPlayground Express.
Clap your hand loudly near the CPB and all the LEDs will turn red. As the seconds tick away the LEDs change first to yellow and then to green. When the 20 seconds are over all the LEDs flash and bleep so its time to rinse. After testing use Blu Tack to place the CPB near the sink and power from the wallwart. It's always on and you do not need to touch it.

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    2 Comments

    0
    tonygo2
    tonygo2

    11 months ago

    Thanks for your comments - at least one person downloaded it.

    I've replaced the file. Hope this is OK.

    0
    aaronlionheart
    aaronlionheart

    11 months ago

    Hi

    In mu , this show me :

    1) 'NEOPIXEL' IMPORTED BUT UNUSED
    2) UNDEFINDED NAME NUM_PIXELES
    3)