hi a video was brought to my attention
from around a year ago in which it seems
like the guy is soldering a bunch of
random transistors and wires together
and he can detect the presence of live
voltage and he got three million views
for it you know what it means
it calls for the rectifier is the
circuit fake or not let's give this
video a watch what oh yeah I've been
using this rake on ear buds for a few
weeks now because this video is
sponsored by Ray Khan it is a great ear
but at a pretty good price point for its
quality I'll give you a better review of
the product at the end of the video but
if you are in market for one of these
click on my link in the description to
get the huge Black Friday discount and
please use my link you know so they can
track I sent you and I go in there good
books and all anyway let's watch it hmm
he is not talking at all what is he
hiding
maybe his accent I couldn't trust him if
he had an accent
why is he making a coil of wire with
only one side connected everyone knows
an inductor needs both sides connected
what is this then an antenna antennas
work at much higher radio frequencies to
receive electromagnetic waves not just
50 or 60 Hertz and a quick wave and
here's the circuit three transistors
some magic wire loop and LED and a
battery no resistor capacitor or
anything and no accent either so we
can't judge if it is true he got around
three million views made around a year
ago how did I not see it until now you
should play better job bringing this to
my attention let's look at the comments
what is this language translated from
russian Russians
he must be Russian then translator says
jihad without a detonator I knew it
Russians are planning a jihad like I
don't think jihad is a Russian thing
though did the translator screw up jihad
G G so the word literally spells jihad
in Russian was the guy trying to say
jihad without a detonator this is a joke
extension cord on one off zero and not
like the video what let's look at the
video again
look when he turns the power bar on the
switch is in the off position and vice
versa aha
that's what the comment meant another
nail in the jihad high-five to all my
Russian friends and everyone else in
that corner of the world but how about
the circuit let's put it together and
see if it works I have a few transistors
not exactly the same but it should work
I made the coil like the video and
solder the circuit exactly like shown in
the video and we'll run it off to
double-a batteries now if I bring the
circuit close to the live wires oh hey
look I didn't need to use live naked
wires for this test okay here's an
extension cord there it works
sorry to disappoint what this circuit
wasn't fake
I noticed if you search for transistor
voltage detector you will find tons of
videos with the exact same circuit or
some with resistors added because
apparently it brings views should do a
better job bringing this to my attention
what why does this video say Wow
incredible idea that should be in every
home haven't you heard of non-contact
voltage testers not only they light up
they beep when they come close to a high
voltage and you can adjust their
sensitivity so the idea is not that
incredible you can buy this anywhere
none of those videos explains how it
works so I assume none of them knows how
it works and that's why they all use the
exact same transistor I found a video
from eight years ago that might be the
source to all this still doesn't explain
it well at least I'm pretty happy that
the viral idea wasn't a hoax free energy
mumbo-jumbo the Mixtrack channel has
tons of great electronic projects you
can check so I guess it's up to me to
explain how the circuit works go ahead
and press like on this video to
appreciate my dedication and buckle up
to learn something this coiled wire is
not a coil but one side of a capacitor
which means if I increase its surface
area it actually works better
see the live voltage is reference to
earth and there is a very tiny straight
capacitance between Earth which can be
the environment or my body to the
circuit and with the capacitance between
the antenna and the live wire the
circuit closes and it can pick up the
live voltage here is just the loop on my
probe and you can see the voltage rising
when I get close to the live wire what
the transferred energy is so small even
my high impedance probe is loading the
voltage and making it smaller so in
order to detect this very low energy
voltage source we must draw extremely
small current from this detector loop
and again a bigger surface area picks up
a higher voltage okay I'll explain a BJT
transistor in my electro boom 101 series
better later but basically for such a
transistor the current into the
collector pin is beta times larger than
the current into the base pin beta which
is also known as hf e is a constant that
can be pretty high like 100 or 500 which
means with a very small base current we
can start a much larger collector to
emitter current now in our detector
circuit first we have a pair of
transistors like this which is called a
Darlington pair so if we need a specific
output current
we need beta times a smaller current
here and another beta times a smaller
current into the base here so to create
the output current
you only need a super small input
current 10,000 or more times smaller
into the base you can buy these
Darlington pairs in one package like a
transistor now we add this final stage
this transistor acts like a switch we
give it some input base current and it
draws beta times more current at the
output and turns on the led
so for example if you need 10 milliamps
through your LED to turn it on you would
need at least hundred times the smaller
current here another hundred times the
smaller current here and another hundred
times smaller here so you would draw
less than 10 nano amps from your antenna
which makes the circuit work now if you
want to run the circuit on more than
three volts you would need to place a
series resistor with your LED if only
one of these videos explained this
circuit now get this video to training
because if his video deserves 3
million views mine deserves ten million
and let me check my rake on earbuds link
in the description for any of their
products to get the Black Friday
discount you can go there directly but
use my link they say this e 25 is their
basic model but frankly I don't know
what else you want from an earbud it has
a very good sound quality which is bass
reach for that extra it has a built-in
microphone so you can make hands-free
calls although I can't find the
microphone hole and the sponsor didn't
want me to take it apart it connects to
my laptop Bluetooth so I'm not stuck at
the computer the charging case is super
small you open it the earbuds
automatically turn on and connect you
put them back and close the lid and they
automatically turn off and the case has
its own battery that charges them they
work for six hours continuously on their
tiny battery or 24 hours if you charge
them by the case battery after which you
charge them by USB they fit very well in
my ear and you can barely see them they
also seal great against the outside
noise that's why while driving I only
put one in so I can hear the road I had
them for three weeks now and they're
great so use my link the video didn't
get to the 10-minute point it's not
gonna get the 10 million views it
deserves do you guys want to watch me
clean my room of course you do
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