Buzzing Timer Headband/Wristband + how to charge your LiPo battery

Buzzing Timer Headband/Wristband

We built our circuit for the buzzing timer we gave you based on this tutorial by Becky Stern for Adafruit: Buzzing Mindfulness Bracelet

Code

If you need to update the code on your Gemma M0, you can head to this page of the tutorial

You don't need the "Code Writer" program that we used at camp to make changes to your code -- you should be able to use any text editor, like TextEdit on Mac or Notepad on Windows.

MakeCode 

If you like coding in MakeCode and feel comfortable with that from playing with your Micro:bit, there is also a version of MakeCode that is compatible with the Gemma M0, which you can find here:

• About MakeCode for Gemma
• Direct link to MakeCode (add "Gemma" as your board after you click "new project") 

Gemma M0

If you want to learn more about the Gemma M0, here is the official Adafruit overview for the product, and here is an overview from CircuitPython 

Battery Charger

We sent you each home with a Lipo Battery (3.7v 100mAh) and a battery charger from Adafruit.

Use a USB to microUSB cable (one came with your Micro:bit) to charge your Lipo battery from a USB port, like this:

There are two LEDs on this tiny charger - one red and one green. While charging, the red LED is lit. When the battery is fully charged and ready for use, the green LED turns on. 

Disclaimer: For use with Adafruit LiPoly/LiIon batteries only! Other batteries may have different voltage, chemistry, polarity or pinout. More details here.