Show HN: Find3 – An indoor positioning system for smartphones and laptops
Our (used to) lighting division is selling a product where we use our LED-lights to track phones indoor. Always thought it one of the coolest applications of our tech. Using the fact that we can control LED frequencies invisible to the human eye but visible to a phones camera to pinpoint devices and provide indoor navigation [0]. Accuracy was tested to be 30cm (when combined with a few other factors).<p>[0] <a href="http://www.lighting.philips.com/main/systems/lighting-systems/indoor-positioning#" rel="nofollow">http://www.lighting.philips.com/main/systems/lighting-system...</a>