Nice. The last thing we need are a bunch of light bulbs competing for crowded Wi-Fi spectrum.
Do you notice the LED flickering during transmission?
Would using a separate infrared emitter and photosensor increase the range?
Do you notice the LED flickering during transmission?
Would using a separate infrared emitter and photosensor increase the range?
As for a separate IR emitter/photosensor, in theory it could increase range. Range ends up being decided by a bunch of tradeoffs and channel conditions that effect your Bit Error Rate (BER), which increases the further you move away from the source. The major factors that effect BER is the noise in the room (the ambient irradiance levels of other light sources), your transmission power, photodiode sensitivity to your wavelength, filtering quality, area of photodiode, and forward error correction quality. So moving to a wavelength with less noise certainly would help tremendously, assuming everything else is equal.
[0] http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=616358...
I can pretty reliably see pulse rates up to ~120Hz. I know of many others who can, too. :) So, please, please, please don't give people the idea (even inadvertently) that pulse rates below 120Hz are going to be undetectable. :)