While watching Youtube channels about aviation, I noticed a guy who have in the scenery a sign with the letters of the iconic minijumbo 777. So I decided to make one for me and turn it into a lamp.

So, I hope you enjoy this piece of decoration I made for the fans of the 777 aircraft.

I used the Tinkerkad online design tool to create the model, so you can get the original files and modify to your favorite aircraft.

Supplies

3D printer
Hot glue
4 M3 screws
Switch
560 ohms resistor (or what suits your circuit)
Some piece of acrilic (a CD cover will do the job)
White LED (could be LED bars, strips or regular leds)
Soldering iron
White spray paint
Handsaw

Step 1: Open the Thinkercad Design Tool

I will try to make a step-by-step guide of how to use the basic of Thinkercad design.

The tool itself is pretty intuitive, but some tips are always helpful.

Open Thinkercad and click on "Create new design"

PS.: The link to my design: https://www.tinkercad.com/things/4PzhDnFNycf-luminaria-777/edit?sharecode=Wt0Fetyrtqvdb87t3VHeF3rfnUZJiDEF5Hsp9jNsa1c

Step 2: Make a Box and Smooth the Edges

Thinkercad make it easy to round the edges of a box.

Draw a box with the parameters showed in the picture.

Step 3: Cut Away the Bottom and the Top

We wanted just the sides rounded, not the borders of the top and the bottom, so we will unite the object with another two hollow boxes, this will exclude the intersection parts with the original cube.

Step 4: Hollowing the Box

Draw another negative cube with the dimensions showed. Use the align tool to center the two models, so group them to make the box itself.

Step 5: Identation for the Screws

Draw for more cubes in the inner sides. This is where the holes for the screws will be.

TIP: Change the grid adjustments to 0.5mm.

Step 6: Making the Lid

To make the lid, draw a box equal to the first box you drew in the first step.

So add two negative cubes in order to get a 3mm slice of the original shape. This slice will fit perfectly with the other box.

It's optional, but you can add some notches 3mm away from the borders to help fit in the main box.

Step 7: Making the Holes for the Screws

Add a negative cylinders in the identation made in the step 5. Copy and paste in all corners.

This part is tricky because you need the same holes in the lid, but you cant group the box and lid together, so the tip is put for cylinders on the corners and duplicate them, lefting them in the same place. Align the lid and the box and group four cylinders with the box and four with the lid.

Step 8: On Off Switch

I have some very small switches that are leftovers from other projects, so I drew a rectangled hole for it.

If you get to this point, I think is already clear to you how to make hollow shapes, so you can make holes to fix the whatever kind of switch you have the way you want.