There is a great Halloween project in the Adafruit Learning System using the Adafruit Circuit Playground to make a glowing pumpkin. Rather than just repeat the guide I decide to put my own twist to the project and make something that I could 3D print everything (because who likes cleaning out a real pumpkin). A search of Thingiverse found plenty of great pumpkins I could print and after reviewing a couple of the designs out their I settled on one by 3DWP.

Before I continue I want to thank 3DWP for their great pumpkin design and Phil B from Adafruit for creating a great project to use as a starting point.

Here is the BOM for this project:

• Circuit Playground (Classic or Express)
  https://www.adafruit.com/product/3333
  https://www.adafruit.com/product/3000
• Orange PLA filament
• White PLA filament (or whatever color you want for the base)
• Micro USB cord (pretty much any style should work with my stand)
• Power Source (5V USB charger or battery pack)

I would recommend purchasing the Express version of the Circuit Playground since for beginning users there is nothing easier than learning and using MakeCode and once you master that you can transition in Circuit Python.

This project is pretty simple. I took the Halloween Pumpkin from 3DWP and scaled it to 85% since I typically make all of my projects printable on the Monoprice Select Mini since that is one of the two printers I use all the time. Next I designed a pretty basic stand in Fusion 360 to both hold the Circuit Playground but also provide a secure resting spot for the pumpkin. I have provided a Fusion 360 file if you want to change my design or use it as a starting point for your own idea.

For information on how to program your Circuit Playground, please follow the Adafruit guide here: https://learn.adafruit.com/circuit-playground-jack-o-lantern?view=all

Follow the print setting recommendations below to print the pumpkin and the stand. I would be happy to post, if requested, the .gcode for either a Qidi Tech 1 or Monoprice Select Mini V1 since I have printed it using both and I know the code works.

Assembly is pretty straight forward. You first slide the micro USB end of the cable through the slot in the bottom of the stand and connect it to your Circuit Playground. Next, you just place the Circuit Playground into the counter bore of the stand. The pumpkin gets placed on stand, followed by plugging in the USB cable to a power source. Enjoy.

Check out the video of the completed project here: https://youtu.be/JUxUK5vLHSg