Previously, I had a brief introduction of using LibreCAD and Python to design a CAD file for a paper case. When we get a CAD file, we need a laser cutter to cut a paper case. However, not everyone has access to a laser cutter, so it would be cool if we can make a paper case by hand with our daily tool.
I also designed a new hardware. It has 4 microphones, 4 LEDs and a touch key. All of its components are mounted at one side of the PCB, which makes it easy to work with a paper case. The touch key can be used to enter Wi-Fi setup mode.
- 400g kraft paper
- double-sided tape
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Step 1: Draw the Outlines of the Paper Case
The paper is very simple. It's just a box with a lot of holes for a speaker, 4 microphones, 4 LEDs, 1 screw and 2 rivets. We can get the dimensions from the CAD file, and then use the pencil and ruler to draw the outlines.
Step 2: Cut the Outer Frame
Use the scissors to cut the frame following the outlines. To cut the speaker hole, we can use a similar size bottle cap to help.
Step 3: Drill the Small Holes for Microphones and LEDs
It's the most difficult part to do, as we have 4 microphones, 4 LEDs, 1 screw and 2 rivets. we can drill a hole with a screwdriver. Part of paper will be extruded. Use a knife to cut the extruded paper.
Step 4: Assembling
Use rivets to mount the circuit boards on the paper, and then fix the box with double-sided tape.
Step 5: Try Again
Like other things, practice makes us better. So I did it again. You can see the difference.