Halloween Skull

Building a skull on a pike, with glowing eyes that follow you around as you move.

29 items
Posted by Timothy Weber in Halloween Skull
(edited)

The fit needs work in many places, but I was able to cram the boards in and test the effect. I think this just might work!

Timothy Weber

face-pan.gif

Posted by Timothy Weber in Halloween Skull
(edited)

Mediocre selfie with un-cleaned-up 3D print that fits so poorly I couldn't connect the sensor. Holding it in my hands tells me a huge amount. Lots to fix, but also lots that works. Woohoo!

Timothy Weber

first face.jpg

"I knew him, Horatio."

Posted by Timothy Weber in Halloween Skull
(edited)

Modeling the cavities inside the skull for placing and accessing the circuit boards. Now I think it's time to hold it in my hands, so this is a cut-down section for 3D printing.

Timothy Weber

cavity test.png

Posted by Timothy Weber in Halloween Skull
(edited)

I've modeled the infrared temperature sensor, placed in the nose cavity, and did this rendering to get a sense for how visible it would be. 3D printing is a prototyping technology, but 3D rendering is a prototype for a prototype!

Timothy Weber

sensor-closeup.gif

Posted by Timothy Weber in Halloween Skull
(edited)

I've finished modeling the eye sockets, and also prepared a little animation to check out the skull from various angles.

Timothy Weber

skull-glowy.gif

Skull with glowing eyes, albeit staring straight ahead.

Posted by Timothy Weber in Halloween Skull
(edited)

A bit more sculpting to leave more space for the mask board. Next I can move on to shaping the eye sockets.

Timothy Weber

skull w mask space plus.png

Temples are now wide enough to accommodate the mask board as well as a 2 mm wall around it.

Posted by Timothy Weber in Halloween Skull
(edited)

Getting back to it after vacation. Sculpted the temples outward to make space for the mask. Probably need to go back and inflate the mask model by a few mm to make sure there's a thick enough envelope around it - but this is good progress.

Timothy Weber

skull w mask space.png

Skull with mask mockup, showing that the mask is now hidden by the skull at the temples.

Posted by Timothy Weber in Halloween Skull
(edited)

I've got the Monster M4sk roughly modeled and placed about where it needs to go. This render shows how I'll need to change the shape of the skull to allow the mask board to be fully enclosed, and probably also change the shape of the eye sockets to fit around the LCDs a bit more evenly.

Timothy Weber

skull+mask mockup.png

Posted by Timothy Weber in Halloween Skull
(edited)

The source code for the board firmware, at GitHub, in my fork of Adafruit's repository.

GitHub

Eyes at trackIR · teejaydub/Adafruit

Smaller programs and scripts to display "inline" in Adafruit Learning System guides - teejaydub/Adafruit_Learning_System_Guides

Posted by Timothy Weber in Halloween Skull

I think this is the model I'll start with for the enclosure. It'll need a fair amount of modification to fit the electronics.

www.thingiverse.com

Re-oriented Skull for supportless printing by aaskedall

This skull is incredible, I just reoriented it a bit and printed it from the back of the skull and it was successful with no support material necessar

Posted by Timothy Weber in Halloween Skull

Crimping pliers that work really well with JST-PH crimp pins.

www.sparkfun.com

SparkFun Electronics

These crimping pliers allow you to easily make your own wiring harnesses using crimp pins and cable housings. We really like the quality and sturdiness of

Posted by Timothy Weber in Halloween Skull
(edited)

Figured out how to make a cable compatible with Adafruit's STEMMA port - I2C over a 4-pin JST-PH socket. I would have bought it from them, but they were out of stock, so I bought the crimp sockets and housings from Digi-Key. Crimping them turned out to be pretty simple; the pliers I already had worked great.

Timothy Weber

Crimping JST-PH.jpg

Housings, crimp sockets, crimping pliers, and the finished 4-pin cable.

Posted by Timothy Weber in Halloween Skull

Tonight I tweaked the eye bitmaps to remove a slightly-visible ring around the eyeball. I think it's perfect now. Moving on to setting up so I can customize the code running on the mask, to add more features: pulsing the brightness, and then scaling the brightness and directing the eyes based on readings from the infrared sensor.

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