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Disco Necklace

I recently made my friend Matthew a suit with hidden LEDs in it. So that his partner, Hannah, wouldn’t be out-blinged, I made her a disco necklace.

 

Video demo

I used an Adafruit Gemma (124-5508) and a strip of neopixels. These were powered by a LiPo battery. I made a little velvet bag for the battery and flora.

Velvet case, hand-sewn 



Gemma and battery were stuck together and slipped into the velvet case

I used three black wires to power and control the neopixels from the Gemma. I plaited them for a pretty effect. I did the same for the other side, although these were not electrically connected.

Plaiting the wires 

Plaited wires made the “chain”  

To make the chain large enough to fit over the head, yet not be too long when worn, I made a very rough closure system. I just left a gap in the non-electrically connected plait and threaded the electrically connected plait through it. Either side of the “gap” I put heat shrink to stop the plait from un-plaiting.

Closure of the necklace  


The electrically connected plait went through the other plait 

To make the neopixels and soldered connections a little less “electronicy” I used waxed cotton (that I usually use in leatherwork) and did West Country whipping around the joints and neopixels.

West Country Whipping around the neopixels, using waxed cotton


Close up of the west country whipping


Whipping around the neopixels


Verdict: Cool to look at, but still a bit too heavy to wear for long!


Bonus video

 
Parts list

Item Supplier Stock number
Adafruit Gemma RS Components (124-5508)
Neopixel ¼ 60 ring Adafruit 1768
Lithium Ion Polymer Battery – 3.7v 2500mAh Pi Supply -

I'm the Maker-in Chief at the Guild of Makers (www.guildofmakers.org). I am also a judge on BBC Robot Wars. I make bespoke items that solve problems. I am a Fellow of the Institution of Mechanical Engineers and the British Interplanetary Society and have a PhD in bubbles (fluid dynamics).

Comments

2 Votes
davecole

November 17, 2017 15:25

Thanks for this, I'm going to have a go at building this for my daughter (12yo) for Christmas. It would be really cool if they flashed in time to what was going on in the surrounding area ie music playing