Courtesy of Adafruit
Guide by Ruiz Brothers
Two piece snap fit case for Circuit Playground
3D Printed Case
Are you looking for a way to protect your shiny new Circuit Playground? A 3D printed case can make it easy to keep your board safe and sound. You can mount the case to anything and embed it into other objects for quick projects.
The Shapes Edition
This is a series of 3D printed cases designed to house a Circuit Playground, battery and switch. Three different shapes can be used for different applications. The board appears recessed allowing the NeoPixels to have a wider spread of light.
Slim and Accessible
The Circuit Playground is exposed, allowing the buttons and sensors to be accessible for interaction and hooking up other components. A port opening allows a microUSB port for programming and powering.
Snap Fit Design
Each case features a "locking" cover that snap fits shut when the nubs on the inner edges mate with indentations on the lip. Cutouts allow cables to plugin to the various connector ports.
If your new to electronics and the Adafruit Circuit Playground, I suggest you walk through the following guides to get the basics. The Adafruit Circuit Playground guide will walk you through setting it up.
3D Printing Services
Don't own a 3D Printer? Download the STL files and upload them to 3D Hubs to order the parts from a local maker and have them shipped to you. You can also search for local hacker/maker spaces for getting access to a 3D printer.
CURA Slice Settings
Here's a screenshot of the settings used to 3D print the top and bottom halves of the case. To get the most accurate tolerances for the snap fit features, you'll want to adjust your slice settings accordingly. The parts were tested with PLA filament, other materials that have more shrinkage such as ABS or Nylon may have different tolerances.
Parts and Supplies
You want to use machine screws (sized M3 x .45 x 5mm) to secure the Circuit Playground to the case. If you'd like to add a battery, you can make a slide switch adapter to easily power it on and off.
2 x M3 Hardware Screws
M3 x .5 x 5mm metric Phillips flat head machine screws
1 x 500mAh Battery
Lithium Ion Polymer Battery - 3.7v 500mAh
1 x Slide Switch
Breadboard-friendly SPDT Slide Switch
JST-PH Battery Extension Cable - 500mm
1 x Mounting Putty Tack
Loctite Fun-Tak Mounting Putty 2-Ounce
Fusion 360 Archive
If you'd like to make changes or upgrades to the 3d model, you can download the fusion 360 archives in many different formats such as STEP, SAT, Solidworks, Sketchup and more!
JST Slide Switch Adapter
You'll want to fashion your own slide switch adapter so it's easy to disconnect the battery when it gets low. The switch can stay put in the case while the battery is removed for recharging. Follow our guide for a tutorial on how to make your own.
You'll want to insert the switch into the holder at a 45 degree angle while pressing down. The body of the switch should have a snug fit with the holder.
Arrange the wires inside the case so the cabling is neatly laid out. The JST connectors can be oriented to match up with the ports on the Circuit Playground.
Stick small pieces of mounting putty onto the surface of the lipo battery. This will keep the battery secured underneath the Circuit Playground and prevent it from rattling inside the case.
Plugin the JST cable from the battery to the connector on the slide switch. Place the battery in the center of the case and press down to set the mounting tack.
Connect Circuit Playground
Plugin the male JST connector from the slide switch to the port on the Circuit Playground. You'll want to keep the wiring from getting tangled, so keep adjusting the cabling until they're nice and neat.
Place the Circuit Playground board over the four standoffs with the micro USB port facing the opening on the side of the case. Line up the mounting holes with the holes on the board. While holding the board down, insert and fasten machine screws until fully tight.
Inspect the wiring and adjust the cabling as necessary. Orient the cover so the larger opening is lined up with the micro USB port on the Circuit Playground. Place the cover on top of the case and firmly press down until it clicks into place.
Make, Remix and Share
Please post and share your Circuit Playground case! You can use the 3D model as a starting point to make upgrades or tweaks.
When the battery gets low, you can use the Adafruit Micro Lipo Charger to recharge over USB. It's so small and handy you can keep it in the case!