@ayke @h5e The dress in the video is a custom design by a fashion designer for a cocktail reception. The customer is a software engineer and her father a pretty successful physicist. The reception was to celebrate a scientific prize he had received. And she wanted something that brought together his physics and her software.
The fabric was custom printed. It shows particle traces in a fog chamber. She was wearing one of these fitness tracker belts around her waist and ran a self written program on her phone that got the heart rate, talked to the microcontroller steering the LEDs and also connected to some IBM cloud service (she worked for IBM) that determined the LED color. Party guests could visit the website and change the color.
I wanted this to be more flexible and without a cloud service and proprietary hardware like the fitness tracker.
The controller is arduino based (but I might change that), the pulse sensor is from https://pulsesensor.com/ and the NeoPixel strings are from AdaFruit, ridiculously expensive to import from the US. But a girl has to do …