3D Printing

3D Parts

STL files for 3D printing are oriented to print "as-is" on FDM style machines. Original design source may be downloaded using the links below.

Slicing Parts

The bowl has a 1.5mm thick shell and it can be printed without any support material.

  • PLA filament 220c extruder
  • 0.2 layer height
  • 10% gyroid infill
  • 60mm/s print speed
  • 60c heated bed

Snap Fit Mount

The Circuit Playground PCB snap fits into the case. Insert the PCB at an angle to fit under the snap. Line up the stand offs with the mounting holes and press down to snap fit.

Top Cover

Use translucent filament for the top cover. The cover snap fits onto the bottom of the bowl and features a notch for passing a micro USB cable for power.

CAD Assembly

The components were modeled in the cad assembly. This animation shows where the electronics are mounted and how the parts fit together.

Container Size

Reference the inner dimensions of the bowl to gauge the size you'll needed for the water and dry ice. Use a water tight container like a plastic bottle or glass jar. We used a 2oz appetizer cup we found from a local party supply department store. 

Design Source Files

The project assembly was designed in Fusion 360. This can be downloaded in different formats like STEP, SAT and more. Electronic components like Adafruit's board, displays, connectors and more can be downloaded from our Adafruit CAD parts GitHub Repo.

Glue Parts

You’ll need to glue some pieces to make the bottom half of the cauldron. You can use superglue to attach these two pieces together. 

Please be careful with superglue - it can instantly bond skin and should never, ever be near eyes. Best used with supervision.

Superglue

You’ll need to glue some pieces to make the bottom half of the cauldron. Use superglue to attach the PCB mount to the bottom half. 

Bottom Half

Use the mounting holes in the center to line up the parts. Firmly hold parts together while glue sets.

Design Source Files

The project assembly was designed in Fusion 360. This can be downloaded in different formats like STEP, SAT and more. Electronic components like Adafruit's board, displays, connectors and more can be downloaded from our Adafruit CAD parts GitHub Repo.

Install CPB board

  • Orient the USB port with one of the notches.
  • Line up the mounting holes with the standoffs.
  • Insert the PCB at an angle to get underneath the snaps.
  • Firmly press down to snap fit the PCB into place. 

Install Top Cover

The Circuit Playground Bluefruit PCB snap fits into the mount. Tabs on the side keep the board in place without any screws.

USB Notch

The cover features a notch for passing a micro USB cable for power.

Install Bowl

The bowl screws onto the bottom half of the cauldron and is tightly fastened with a nice and seamless finish. 

 

USB Access

The micro USB port should be accessible through the hole on the back of the bowl. If the JST connector is visible instead, remove the Circuit Playground PCB and rotate it 180 degrees.

Plug-in Power

On the back of the bowl we have access to the micro USB port for power and programming.

There’s enough space at the bottom for a battery but you can also power the board over USB.

This guide was first published on Oct 06, 2019. It was last updated on Oct 06, 2019. This page (3D Printing) was last updated on Oct 17, 2019.