Morse code DVD drives fiber optics that
helicopter from Independence Day that got super wrecked by those aliens who
weren't that friendly we've been using visible light to communicate with each
other in a lot of different ways for a long time but imagine this for a second
data flowing out of your living room light fixture like water from a shower
head it's real and it's called lii the
LIE of course standing for Li because I invented no just kidding uh standing for
light but aside from the novelty of it how would this be better than existing
standards like Wi-Fi that use radio waves
great question well unlike the RF signals that make up a Wi-Fi connection
which tend to spread out everywhere from the access point visible light is easier
to focus and concentrate in one area I mean just go outside with a magnifying
glass on a sunny day if you don't believe me this makes it possible to fit
a lot more data into a lii signal but
then it raises even more questions how would visible light transmit data anyway
well lii uses LED bulbs which can be
switched on and off very very quickly they don't have that warmup time or that
warm up time of an incandescent or a fluorescent so quickly can this be done
in fact that the human eye cannot even detect it but special receivers that can
connect to your computer or other device can translate this flickering into
actual data and here's another cool thing visible light is also much less
susceptible to interference than radio waves so you add all that up and you end
up with a communication standard that could be much faster than Wi-Fi in fact
researchers at Oxford achieved speeds of
224 gbits per second in the laboratory
that's over 200 times faster than even a Google Fiber internet connection and
Beyond just raw speeds lii promises to
offer a number of other advantages since it only uses visible light lii signals
can't penetrate walls offering a higher degree of privacy a malicious user who
wants to Snoop on your network traffic would actually have to be physically in
the same room or at the very least creeping outside your window making it
nearly impossible for someone outside your home or office to eat drop on your
wireless signal and since lii uses
relatively inexpensive LED bulbs which consume less power than a Wi-Fi access
point visible light networks could be deployed relatively cheaply using mostly
existing technology the power savings also potentially could have significant
implications for Global energy consumption if lii becomes as ubiquitous
as Wi-Fi has one day especially as lii
transmitters can be dimmed to reduce bandwidth with if you don't need to
download 15 movies in 1 second but although the technology has great
potential it is still very experimental
and we probably won't be seeing it hit the mainstream market for several years
at best and it isn't without its limitations either for example lifi
offers greater privacy but the disadvantage of obviously not working in
the Next Room over unless you've you know got your light bulb synced or
whatever else and it could also be disrupted by excessive light pollution
though maybe we're ignoring the biggest advantage of all not having to shop for
routers and light bulbs in a separate aisle at the store anymore you guys
should definitely check out the link in the video description to Fresh books
it's designed for freelance workers or small businesses and it's basically an
online tool that makes invoicing getting paid and tracking your expenses easier
all the little details about cash flow are in one place so you know where you
stand it shows a full history of each invoice and allows you to check if your
client has viewed the invoice and PID directly through fresh books by credit
card and this is cool they actually just launched their deposits feature so if
you're a house painter or a plumber or any kind of work where you might do you
know a deposit and then half the work and then you know some more work and
then they pay the rest at the end or whatever else those more complicated
payment schemes are Now supported pretty
cool stuff so all you got to do to try out freshbooks for free is head over to
freshbooks.com tequ and don't forget to enter Tech
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pretty sick the a7s Mark 2 or two or R2 or whatever it is that Sony calls their
second generation follow-ups we can never keep track of these things also
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