Dawn of the Geeks

Joystiq.com has a story about using a couple candles to replace the “sensor” bar. It works because candles are hot and therefore emit infrared light.

I don’t know why they call it a sensor bar. Probably because “invisible light bar” would probably just confuse people more. All the bar contains is 10 infrared LEDs. I’m not sure why there are 10 of them. Only two sources of IR light are actually needed. If I had to guess it’s because the bar will last 10 times longer. Also, what are the odds of 9 LEDs being bad?