I love this project, and this is meant as an honest question rather than criticism: has the creator given any thought to FCC certification?<p>My understanding is that in the US, this device would be classified as an "unintentional radiator". If you want to sell it as a finished product to consumers, then you're legally required to get it tested by an ANSI C63.4 compliant lab to ensure that it meets the legal limits for RF emissions into the air and the power grid. AFAIK the typical cost for a round of testing is >US$1000, and it needs to be repeated if you make hardware changes of pretty much any kind.<p>I've occasionally considered making and selling projects kind of like this one as a hobbyist, but it seems like the cost of compliance testing means that you have to be reasonably sure that you'll sell at least a few units, or else you're just throwing money away.