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КАК БЫСТРО ОПРЕДЕЛИТЬ ЦВЕТОВУЮ МАРКИРОВКУ РЕЗИСТОРОВ + SMD - РЕЗИСТОРЫ

КАК БЫСТРО ОПРЕДЕЛИТЬ ЦВЕТОВУЮ МАРКИРОВКУ РЕЗИСТОРОВ + SMD - РЕЗИСТОРЫ

Channel: Радиолюбитель TV

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Channel: Радиолюбитель TV

катушка индуктивности

индуктивность

цепи переменного тока

сопротивление катушки

расчет индуктивности

ток в катушке индуктивности

индуктивность катушки равна

частота катушки индуктивности

сопротивление катушки индуктивности

электроника

радиотехника

схема

радиоэлектроника

основы электроники

радиолюбитель

техника

бытовая техника

видео техника

магазин электроники

компьютер

микросхема

конденсатор

резистор

в помощь радиолюбителю

для начинающих радиолюбителей

00:00:04

hello everyone, dear friends, and today I

00:00:07

will tell you how an inductor behaves

00:00:08

if you apply

00:00:10

direct or alternating current to it, I want to

00:00:12

remind you that direct current always

00:00:14

flows in one direction and alternating

00:00:16

current changes its direction with a certain

00:00:17

frequency, for

00:00:18

example, our electrical network is 220

00:00:20

volts the current flows with a frequency of 50 hertz, which

00:00:22

means that it changes its direction 50

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times per second, so first the

00:00:26

inductor coils in the DC circuit

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for this experiment we will need a

00:00:30

power supply that produces a constant

00:00:32

voltage, an incandescent light bulb and the

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inductor itself

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to make an inductor with

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good inductance we need to take a

00:00:39

ferrite core and wind

00:00:41

varnished copper wire around it, then

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clean the leads, measure the inductance of

00:00:45

our coil using a meter, these

00:00:47

meters are a device that measures

00:00:49

inductance and capacitance, I’ll

00:00:51

tell you about it someday, so the inductance

00:00:52

we get is 132 microhydrin, now we’ll

00:00:55

assemble such a small one a diagram where or

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we have an inductance coil l an

00:00:59

incandescent light bulb with a voltage of 12 volts the bug

00:01:01

is a power supply unit that gives us a voltage of

00:01:03

12 volts, you can use just

00:01:05

a battery the light bulb lit up as you

00:01:07

remember, the capacitor did not let us through the

00:01:09

direct current, which means we conclude that it is constant, the

00:01:11

critical current

00:01:12

flows almost unhindered through the inductor

00:01:16

only the wire itself from which the

00:01:17

coil is made has resistance. Now let’s look at the

00:01:19

inductor in the AC circuit.

00:01:21

For this we will need an oscilloscope. The

00:01:23

frequency generator itself is the inductor itself

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and a 100 ohm resistor. The

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greater the resistance, the less the

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voltage will sag from my

00:01:31

frequency generator, so I took it on

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the table. we put it all together according to this scheme,

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it turned out something like this: just lags, I

00:01:37

already said when we looked at

00:01:39

the issue about capacitors, let me remind you that the

00:01:41

first channel is the signal at the input, we

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will have a red color, the second channel, the signal

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at the output will be yellow, therefore the red

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sinusoid of this purity that gives

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us frequency generator and the yellow one is the signal

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that is taken from the resistors, we have

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already learned that at zero frequency this is a

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direct current, the coil almost

00:01:56

freely passes

00:01:58

electric current through itself. In our experiment, we will

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feed the frequency generator a

00:02:01

sinusoidal signal with different frequencies

00:02:03

and see if the voltage across the resistor changes

00:02:06

to begin with, we apply a signal with a frequency of 1

00:02:08

kilohertz, let's figure out what is that

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green ladies, I brought it out automatically and

00:02:13

ourselves, which makes an oscilloscope, red

00:02:15

circle, number 1, these are measurements of the red

00:02:17

channel

00:02:18

as we see f frequency 1 kilohertz m.a.

00:02:21

this amplitude of the signal, that is, the voltage is

00:02:23

196 volts, but roughly speaking, two volts,

00:02:25

look at the circle with the number 2 in

00:02:28

yellow, the frequency is 1 kilohertz, the

00:02:30

amplitude is the same, that is, we can

00:02:32

say that the output signal coincides with the

00:02:33

input signal, then we increase the

00:02:35

frequency to ten kilohertz, the amplitude has not

00:02:38

decreased, which signal there is one, I

00:02:39

stayed, let’s increase it to 100 kilohertz,

00:02:41

now the amplitude of the yellow signal has become

00:02:44

smaller, and even the graph of the yellow signal

00:02:46

shifts to the right and then it’s delayed,

00:02:48

or, speaking scientifically, phase shifts appear, the

00:02:50

red signal does not move anywhere,

00:02:52

it’s delayed by the yellow one, keep this

00:02:54

in mind, spilling you too, I’m already spoke in the

00:02:56

issue about capacitors C2 fas, this is

00:02:58

the difference between the initial phases of 2

00:02:59

measured values, and we will increase the frequency

00:03:01

to 200 kilohertz;

00:03:03

at this frequency, the amplitude has already dropped by

00:03:05

half, and the phase difference has become larger; we will

00:03:07

increase the frequency to 300 kilohertz; the

00:03:09

amplitude of the yellow signal has already dropped to

00:03:11

720 and millivolts and the phase difference has become

00:03:13

even greater, yes, I also increase the frequency

00:03:16

to 500 kilohertz, the

00:03:17

amplitude has again decreased to 480

00:03:20

millivolts, we will add more frequencies to 1

00:03:22

megahertz, the amplitude has become 200 80

00:03:24

millivolts, but we also add the frequency to the

00:03:26

limit that the frequency generator allows us to

00:03:28

2 megahertz, the amplitude of the yellow

00:03:30

signal has become so small that

00:03:32

I had to even increase your village

00:03:33

graph 5 times and we can say that the

00:03:36

phase shift has become almost 90 degrees or pi by 2,

00:03:38

but will the phase shift become more than 90

00:03:40

degrees if you apply a very, very

00:03:42

high frequency, experiments say that

00:03:44

no if you say it’s just that at an

00:03:46

infinite frequency the phase shift will be

00:03:47

equal to 90 degrees and if we combine

00:03:49

our graphs for infinite purity, then

00:03:51

we can increase approximately this

00:03:53

figure so that we can conclude that with

00:03:55

increasing frequency the resistance of

00:03:57

the coil increases and the

00:03:59

phase shift also increases and the higher the frequency the

00:04:01

greater it will be phase shift but not more than 90

00:04:03

degrees, now let's reduce the

00:04:05

inductance of the coil and run it again

00:04:07

at the same frequencies, I removed half of

00:04:09

the turns and made branches on the summer graph,

00:04:11

thereby reducing the inductance to 33

00:04:13

microgens 3 so let's run it at the same

00:04:15

frequencies, we have 1 kilohertz

00:04:18

nothing has changed 10 kilohertz also

00:04:20

nothing has changed 100 kilohertz also

00:04:22

almost nothing more than

00:04:24

once except that the yellow signal began

00:04:25

to quietly shift 200 kilohertz

00:04:27

here we can already see that the amplitudes on the

00:04:29

yellow signal begin to subside and the

00:04:31

phase shift increases in speed 300

00:04:33

kilohertz the phase shift has become larger amplitude

00:04:35

sank even more than 500 kilohertz, I

00:04:37

will gain even more phase shift, and even

00:04:40

less than 1 megahertz, the amplitude of the yellow

00:04:42

signal will blow, the shift is increasing and the

00:04:44

limit is 2 gigahertz, the phase shift has become equal to

00:04:47

90 degrees, the amplitude has become even less

00:04:49

than six months, pay attention to the

00:04:51

amplitude in volts at the same

00:04:52

frequencies in the first In our case, the

00:04:54

inductance was greater than in the second

00:04:56

case, but the amplitude of the yellow signal in the

00:04:58

second case is greater than in the first. Hence,

00:05:00

the conclusion suggests itself when the

00:05:02

inductance of the inductor resistance decreases, the

00:05:04

inductance coil resistance will also become less.

00:05:06

With the help of simple inferences,

00:05:08

physicists have deduced this formula where

00:05:10

excel is the resistance of the coil and this is a

00:05:12

constant 3.14 f this is the frequency

00:05:15

inductance in this experiment we got a

00:05:17

low-pass filter as you

00:05:19

can see for yourself at low frequencies the

00:05:21

inductor almost does not

00:05:22

resist the voltage therefore I am

00:05:25

weaving and the power at the output of such a

00:05:26

filter will be almost the same as at

00:05:28

the input, but with an increase in frequency, the amplitude is

00:05:31

damped by applying such a filter to the

00:05:32

speaker, we can confidently say that

00:05:34

only the bass will be amplified, there is not the

00:05:36

amount of sound, if you want to

00:05:38

experiment with

00:05:40

inductors, you can purchase them on

00:05:42

aliexpress, I will leave a link to them in the description in

00:05:44

this assembly has 120 inductors,

00:05:46

12 different types with different inductances,

00:05:48

what else useful and interesting

00:05:51

inductors can you say,

00:05:52

be sure to write in the comments and I’ll end here,

00:05:55

like if you liked this video

00:05:57

and subscribe to the channel so as not to

00:05:59

miss new episodes

Description:

Видео создано по материалам сайта: https://www.ruselectronic.com/katushka-induktivnosti-v-tsepi-postoyannogo-i-peremennogo-toka/ Катушки индуктивности на али (120 шт.): https://hz.ru.aliexpress.com/item/1207612806.html?isOrig=true&af=59957_1&cv=781453&cn=42seh9cb80f3vmu2voi4e3e60whvdjn8&dp=v5_42seh9cb80f3vmu2voi4e3e60whvdjn8&product_id=1207612806&afref=&aff_fcid=382c1c3f4cdb41a7b407e7af4ec3f1e7-1717372812044-06896-_9hwhcM&aff_fsk=_9hwhcM&aff_platform=portals-hotproduct&sk=_9hwhcM&aff_trace_key=382c1c3f4cdb41a7b407e7af4ec3f1e7-1717372812044-06896-_9hwhcM&terminal_id=d24dba831dbc411e82940a1603ed5854 Группа в ВК: https://goo.gl/pE36V9 Реклама на канале: https://goo.gl/r9jM6p Почта (для сотрудничества): [email protected] В этом выпуске вы узнаете: как ведёт себя катушка индуктивности в цепи переменного тока и в цепи постоянного тока, как связаны частота катушки индуктивности и сопротивление катушки индуктивности ___ Смотрите наши видео, в которых мы простым языком рассказываем о радиотехнике, электронике и радиоэлектронике! Наши уроки будут особенно полезны для начинающих радиолюбителей и студентов радиотехнических ВУЗов. В видеороликах мы даём основы электроники: определения, описания, схемы и принцип работы различных элементов радиотехники. В наших видео вы узнаете: что такое транзистор, диод, конденсатор, резистор, микросхема, электрический ток и много других разных интересных вещей и явлений, связанных с электроникой.

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