Coralboard SL basic case with battery

This model is a basic case made in Onshape to use an 18650 battery for portability. It uses M3 screws and M3 heat set inserts. 

Please read and follow all instructions.

note: some screenshots were taken before some revisions so they may be slightly different then the models posted here. 

1 Gather Parts

1. 10x M3 x 4 mm heat set inserts

2. 10x M3 x 8 mm screws

3. Coralboard SL

4. 18650 battery (here's mine: https://www.adafruit.com/product/1781)

5. Battery extender (suggested: https://www.adafruit.com/product/1131)

6. Slide switch (use whatever you have. If your's needs a hole other than 6x11 you can cut one with a slicer or CAD)

7. hot glue, Gorrila glue, etc. (use whatever you have.)

2 Print the files

Files are provided in .stl and .step formats along with the Onshape file here.

Check the size of your slide switch. If it needs a different sized hole, cut it in the blank model with slicer or CAD.

Print out each model with the Arachne wall generator.

3 Assemble

• Press the heat set inserts into all spots circled below, eight in the base and two in the lid.

• Place the user button and reset button into their places on the base, as shown below.

• Fit the Coralboard into the base so that the ports and buttons line up with the holes in the printed part.

• Screw it in with four M3 screws.

• Place the battery into the battery holder with the wire's side on the circled side of the part in the image below.

• Insert the battery's wire through the hole in the case lid pictured below.

• Screw the battery holder onto the lid just the holes marked below for now with two M3 screws.

• Cut the wire of the extension cable that will be attached to the battery's positive + wire 80 mm down the extension cable from the battery as shown in this illustration below. Don't connect the extension cable to the battery yet.

• Glue/friction fit the slide switch into its hole, shown below, with the switch facing outwards.

• Strip a few mm off each end of the wire you just cut.

• Solder one wire to the middle pin on the slide switch and the other to one of the side pins of the slide switch.

• Attach the battery extension cable's female end to the battery.

• IMPORTANT! Check the battery's polarity vs that of the Coralboard. If the wire connected to the battery's positive wire doesn't go to the the Coralboard's positive input, then the wires in the extension cable need to be swapped. Please note that you should check routing all the way back to the battery as the extension cables battery may not match that of the battery.

• If the wires need to be swapped, use a paperclip or safety pin to press down on the clips holding the wires in the male end of the extension cable and pull the wires out. Next, swap them so that they match the Coralboard's polarity.

• Plug the extension cable's male end into the Coralboard's female port.

• Place the lid onto the bottom and screw it in with four M3 screws.

• Turn on and test.

I hope you found this model useful. Fell free to edit and use this however you would like.