There’s a lot to like about this light-up pendant build which makes use of Adafruit NeoPixel Jewel, which has seven controllable LEDs, a Trinket, and your choice of either upcycled or 3D-printed and painted pendant shell.
Maker Erin St Blaine chose a pendant shell with the right sort of holes to optimally show off the illumination created by wiring up a tiny breadboard with minute backpack charger, before soldering on two lengths of wire that double as the necklace itself. Adding a micro USB connection means recharging can be done by plugging into a laptop or USB charger when needed.
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