In February, I shared my passion for the integration of fashion and technology with the TED audience at the TEDYou Stage in Palm Springs. During my talk I wore a light up jacket that was made from hacking Eric's HeartSpark necklace. The jacket was beaded with lights that blinked in rhythm with my heartrate in real time.
If you want to make something similar you'll need to purchase a HeartSpark and a Polar sensing strap. You'll also need some 28 guauge stranded wire, a soldering iron, heat gun, some crystal beads and a beading needle. The process is simple. All you need to do is heat up the silicon gel covering the front of the HeartSpark circuit with the heat gun and remove it (carefully). Then extend the LEDs with fine gauge wire and put them wherever you want on your garment. Add some crystal beads on top of the LEDs to help them shine and sparkle.
[picture of the hacked HeartSpark with wires soldered and extending the LED leads]