EEG Costume Cap pt. 1

EEG Costume Cap pt. 1


Today I’d like to introduce an ambitious
project– it’s a skull cap covered in NeoPixels with 3D printed diffusers to look like a sci-fi
version of an EEG brain sensor network. Today we’ll cover the sewing and soldering
aspects of this project, and in a future episode we’ll talk about programming animations
and even controlling the lights over bluetooth with your Android or iOS device– so be sure
to subscribe to catch part two when it’s posted. First print out the skull cap pattern for
this project– it’s available as a tiled PDF on the Adafruit Learning System. Cut out
the pieces and tape together the long center pattern piece. Fabric choice here depends on your comfort
level with sewing– a nonstretchy woven material is best for beginners, since knit or slippery
fabrics can be a bit tricky. However after prototyping a few different iterations of
this cap, I can tell you that the stretchy spandex one has the best fit across different
head sizes. Cut two layers of fabric under each pattern
piece. First construct your two side panels and the center panel, then join all three
of those together. Topstitch the seam allowances and edges. Try on your cap to make sure it fits. This
project is very labor intensive, so it’s worth the time it takes to get the fit right,
which is small in comparison to the time it’ll take to solder and sew all the pixels. Next up, prep a whole pile of small silicone
coated wires by marking the length, cutting, and stripping both ends. Tin your wires and
NeoPixel pads before joining the two. Create many strips of seven to 11 pixels, with all
the arrows pointing in the same direction. A foam head is very handy for the next step,
which is to establish placement for the strips of pixels. Arrange and pin them onto the cap,
then use more wires to connect in between each strip. I also added extra power and ground
wires as recommended for long runs of pixel, working them into the design of the cap. Once your pixels are all soldered, wire them
up to a FLORA if you plan to add advanced features like bluetooth, otherwise you can
get by with a GEMMA. Test them out and troubleshoot any connections now before proceeding to the
sewing step. Now it’s time to attach them all to the
cap. Using clear or color-coordinating thread, make stitches around the wires just before
and just after each pixel. To make it as durable as possible, make each attachment independently
knotted off so if one thread gets snagged, it doesn’t release a whole row of pixels. While you’re sewing the pixels, print out
a big pile of diffusers in white or translucent NinjaFlex. The sewing of each individual pixel and diffuser
is definitely the most time-consuming part of this project, and you can see I’m a little
over halfway there. Thanks for watching, Join us in a future episode where we’ll cover
adding a FLORA Bluefruit LE module and coding up some sweet animations for this head-turning
costume project.

7 Replies to “EEG Costume Cap pt. 1”

  1. This is amazing! Becky Stern, you are amazing. In fact, @Adafruit Industries in general is amazing! 🙂

  2. Awesome thing! looks awesome already! 😀 looking forward for the programming part!
    Just some addition to the hat: some pointy things standing off of it like horns, spikes, (cat) ears or antennas would look awesome on it!

  3. You guys need to take a look at my ironman eeg helmet with voice recognition when i get it done in a few weeks

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