Materials: Arduino QT PY, Lithium Ion Polymer Battery, Adafruit I2C Stemma QT Rotary Encoder Breakout (rotary encoder/LED), Foam, Pipe cleaners, Dial, Case (3D printed: file in files area), Watch strap

Place the battery and QT PY into the case like so.

Push the foam into the middle of the battery and QT PY to give them a tight fit.

Fit the dial into the the Rotary encoder and place the encoder on top of the battery and QT PY. Also add a block of foam to the side to have a tight fit.

Wrap pipe cleaners around the case and the watch strap to attach the two (Keep in mind that the pipe cleaners and foam are temporary solutions for the prototype only) 

Use a USB type C adapter to connect the QT PY to your computer. Copy/Paste the final code into your Arduino IDE and upload it.