Step 1: Materials
- 2 Pumpkins (One giant pumpkin, and a little guy for the controller)
- 128 10mm LEDs
- 1 Joy Stick
- 2 8x8 Grids/Backpacks
- 1 Arduino
- a LOT of wire
- heat shrink
- electical tape
- drywall anchors
- coupling nut/50mm extension bolt - 6mm diameter
- exacto knife
- heat gun
- wire stripper
- soldering iron
- drill - 1" hole saw, and 13/32" bit for LED holes
I also used a laser cutter to make a jig, more on that later
Step 2: Building the circuit
I marked up the joystick with tape and a sharpie so I could remember the orientation of the controller before I jammed it in the pumpkin - I also machined out some slightly larger holes to make it easier to mount the joystick in the pumpkin.
The Arduino requires the following libraries from Adafruit:
And here is the sketch
A small understanding of how these microcontrollers function is helpful when building these kinds of projects. I had to do a little fussing in the sketch when the joystick wasn't communicating in the way I had initially anticipated.
Step 3: Jig for assembling matrix
The LEDs fit nicely in there, and didn't wiggle around too much when I moved the matrix around.