I liked the idea of making a making a LED sign and incorporating my name
I wanted to make it cursive
Using different materials (acrylic, spray paint)
Questions I had:
How are the LEDS going to light up? Saudering
NEO pixel lights?
6mm? - making sure that all of my lines were 6 mm thick
How to hide the cords? - adding holes on the backer
Link to Project Checklist:
https://docs.google.com/document/d/1fK4q88RdAxCZBbXsc4ugXnnZ1HzLKh4WB9OxNq1dDZQ/edit?tab=t.0
Materials
Super Glue
Masking Tape
1/2 wood
Spray paint - grey
Sander - Sand paper
Shot Vac
Acetone
Exacto Knife
Clear Coat
Standoffs
Neo pixel LEDs
Solder Wire
Wiring
Wire cutters
Solder iron
Electrical tape
Clear coat
Acrylic Glue
Equipment:
CNC machine
Computer
CNC computer
Laser Cutter
1/4" Acrylic
Software:
Adobe Illustrator
Fusion 360
First I found a cursive font I liked and expanded the letters
Next I offset the path to create the backer
After layering these on top of each other I used the pen tool to create the 6mm outline for the LED strip to fit inside
Creating the holes for the wires
I imagined how the leds would flow around the sign and then I put a measured the end of the LED to see how big the holes needed to be
This step includes moving your design to Fusion 360 to finish the designing process. When your design in Adobe Illustrator is complete, export the finished file as a DXF. Open the file in Fusion 360 from your downloads. Start off importing a sketch on the x - y plane. Make sure to select the correct layer you are cutting (Cut 1). Once your sketch is visible, use the extrude tool to your desired depth of wood (0.5 inches).
Figure out how big the piece of wood you are cutting is. You can use the size of your artboard for this. Then, create a new sketch for it to go on. Select the bottom of your piece that you wish to create your sketch on, then size down the rectangle to fit your design. Round and then finish by extruding up. Change the extent tense to TO OBJECT. Select something at the top of your sketch, change the operation to New body, and make sure it is cutting.
Set up
Stock Tab
Mode - FROM SOLID
Body 2 solid stock select
Setup up tab
Box point - Click on corner for 0,0,0
Model — Body 1
Select tool 6
Geometry
Select Bottom surface
Passes
Turn off stock to leave
Turn on multiple depths
Verify to make sure it is the correct depth
Select Tool 8
Geometry Tab
Select bottom edge
Heights Tab
Bottom heights
Offset -.02
Passes Tab
Multiple Depths
Verify
Simulate
Post process
Export as a NC file
Name file
Email to Makerpace@dawsonschool.org
Running the job
Download Gcode on CNC Computer
Mount plywood on CNC using green tape and CA Glue
Load job into control software
Set X,Y,Z zeros
Make sure the air compressor is on
Run job
Sand down so that it is smooth all of the circles are cut through
First cut the letters out on the wood
Object expand all of the blue LED lines and change all cut lines to have a 0.001 stroke
Select material and load on to laser cutter
Make sure the fan is on and the job is focused
Run job
Clean any burn marks with asetone
I created a code so that when the lights are plugged in you can press button A and purple lights will appear and when you press B on the micro bit the lights will turn rainbow
To test if this works plug mircobit into the computer and download the code
Next, we soldered all of the wires from the 5V board which we plugged the micro bit into
We also added an attached that connects to a switch to turn the lights on and off
Once we measured where the length of the LEDs we found the nearest cooper pad and cut a small part of the rubber back so that we could open the LED and access the copper bad in the middle so that we would have room to solder on both sides
Next, we cut wire and soldered onto copper pads and then soldered wires together
Once the LEDS were connected we threaded all of the connecting wire through the holes to the back of the board
I spray-painted both sides of the sign and sanded in between coats for a smooth finish. Once it was dry I used two coats of clear coat.
I used the sander to cut some of the the acylic part smaller so that it would fit on the white acrylic. Then I used acrylic glue to place the first part of the stand off and screwed small screws which connects the stand off to the wood.
I first threaded the LEDs through the sign and aligned the leds. Next I added the center part for the letters O,L,A and superglued and sprayed with adhesive then I laid out where I wanted to place the letter and pushed down lightly on the acrylic part of the stand off.
Next I screwed the cap part of the stand off into the backer and pushed everything together.
I made the holes bigger on the board and screwed in using small standoffs so that I can access the buttons that change the color of the sign.
What went well during this project?
I had a lot of ups and downs with this project something that I did well was cutting on the CNC after fixing my file to make sure the holes were the same size. Another thing I did well was laser cutting the acrylic and learning how to solder.
What challenges did you encounter?
Some challenges I encountered during this project were making sure all of the LEDs were in the right direction and all of the solderings were neat. Another thing I struggled with was being very careful when moving the LEDs so that the soldering didn't pop off, something we did to try and fix this was adding hot glue. I also had trouble with the stand offs, they kept coming off.
If you were to do this project again, what would you change?
If I were to do this project again I would really think about my plan and how I was going to do everything before I started things like where to cut the LEDs, how to make sure the acrylic backers don't come off.