This is a very straightforward build -- all you need is a yardstick and some zip ties to attach the NeoPixel strip, board, battery, and potentiometer!
We'll customize the build a little bit to give it a nice fit and finish.
To make the Light Paintstick more comfortable to hold, you can use some sandpaper to shape the handle section a bit and round off the edges.
Now that he stick is prepped, it's time to add the electronics!
You can secure the potentiometer-to-cable connection with a bit of tape to prevent it from disconnecting.
Now we can connect the HalloWing and components to the stick.
Lay the NeoPixel strip on one side of the stick, with the LEDs facing up.
Use zip ties to secure the strip to the stick.
Trim off the excess zip tie ends with diagonal cutters or scissors.
Connect the potentiometer to the Light Paintstick with a zip tie as shown.
Secure the battery just below the potentiometer with a zip tie.
Here's what the finished HalloWing Light Paintstick looks like!
You can create a Circuit Playground Express Light Paintstick instead if you like! For this, we'll use a 3x AAA battery box instead of a LiPoly, a NeoPixel strip with alligator clips, and we won't use a potentiometer, instead controlling playback speed with the CPX buttons.
Use double-stick foam tape to connect the CPX to the stick, and to connect the battery box to the back side of the stick, behind the CPX.