A rechargeable glowing wristband that reacts to music, powered by a thin LiPo battery. The TPU band has 15 LEDs inside. The animations are driven by audio analysis and controlled with an ATTiny85 processor.

Why did you make it?

I like electronic music events and festivals and my wife likes to dress up so I wanted to bing this together. I enjoy the synesthetic aspect of sound and light in a good club and so am I always trying to make the lights dance.

Technical details

• Adjustable diameter: 5 - 8 cm
• NFC-Tag NTAG213 Midas 168Byte
• Charging the wearable takes less than 20 minutes. The two LEDs inside the plug will provide charging progress during charging (red = charging, blue = full).
• The wearable has a BMS directly at the battery to prevent over/under charging. I run the LEDs and processor directly from the battery. The built-in charge-controller will manage the optimal charging voltage. A Full charge is good for about 6 hours.

Modes

The colors of the lights can be changed with the push button on the side. Click for color change:

• Yellow
• Green
• Cyan
• Blue
• Purple
• Pink
• Red
• White
• RGB multicolor

The RGB multicolor mode has 8 color pallets. They will be combined with 9 animation algorithms, this results in 8*9 = 72 different impressions of the animations. All animation algorithms react to beat and sound volume and will automatically adjust the gain at the festival or club - it works best when it's loud.