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How does a switching power supply | Part 3 | Superconductors in action

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Channel: ElectronicsClub

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Импульсный блок питания своими руками. UC3842

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Антенна MiniWhip RA0SMS

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Channel: Паяльник TV

электроника

своими руками

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адаптер питания

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варистор

00:00:00

I welcome everyone to the ABC of

00:00:02

Radio Circuits channel. Today I want to tell you

00:00:05

why on the circuits there is often a

00:00:06

fuse next to it. Another rather

00:00:08

incomprehensible part slightly reminiscent of a

00:00:11

capacitor and Many even think that it is a

00:00:14

capacitor because it stands

00:00:16

parallel to the circuit as a capacitor should be,

00:00:18

but there is confusion here

00:00:21

Victor Nego may be similar to

00:00:23

some types of capacitors But this

00:00:25

part is called a varisto and it works

00:00:28

completely differently Let's look

00:00:30

at the circuit Yes, indeed, it is connected

00:00:33

in parallel with the input circuit and is located after

00:00:37

the fuse in the connection with the fuse,

00:00:39

it is a very good protection How

00:00:42

it works Let's first look

00:00:45

at characteristics of this part and As

00:00:47

you can see, its characteristics are slightly similar

00:00:50

to a zener diode, a zener diode which is

00:00:53

turned in both directions in this part, the

00:00:56

resistance begins to drop sharply and the

00:00:59

flowing current increases after a certain

00:01:02

voltage, and in one direction, that is,

00:01:05

the positive side, and in the opposite negative direction, it

00:01:08

turns out that at this this voltage

00:01:11

there is a breakdown of this part, an increase in

00:01:14

current leads to a short circuit, but if we

00:01:18

look again at the diagram, we can see that

00:01:21

this part is located after our

00:01:23

fuse and what will happen is that

00:01:26

the fuse will simply blow. This is how

00:01:29

this circuit works in conjunction,

00:01:31

or rather, these two parts work in this

00:01:34

circuit as only the voltage begins to

00:01:36

exceed the threshold of our larister says the

00:01:39

old ones come in different voltages, but

00:01:42

often at the input of the equipment they cost a

00:01:44

certain nominal value, which saves

00:01:47

when the voltage surges above what is dangerous for

00:01:51

our equipment, and this is how a breakdown occurs in

00:01:54

our restaurant, the current consumption increases sharply,

00:01:56

this current is closed to the

00:01:59

samboristo until it hits the circuit at this

00:02:02

moment our fuse blows out,

00:02:05

our entire circuit is saved The only thing that

00:02:08

can be We will have to replace, in addition to the

00:02:10

fuse itself, the varistor will

00:02:12

most likely also have to be

00:02:15

replaced because most often they

00:02:17

fly out during the throw and now that you

00:02:21

have changed the fuse, your device

00:02:23

should already work, but be sure to Don’t

00:02:26

forget to install the barista again so that

00:02:29

next time the circuit will work and save

00:02:32

your electronics I hope that with this video

00:02:35

we figured out how the barista works and

00:02:38

what it’s there for anyway And that it’s not a

00:02:41

capacitor but really a varistor

00:02:43

if you liked the video be sure to

00:02:45

Like Share this video And

00:02:48

on this everyone

Description:

Ремонт электроники для начинающих. Как сделать Ремонтируем за копейки. Спутниковый ресивер ( тюнер ) или любое другое электронное устройство с питанием от сети его главные проблемы . Вышедший из строя варистор как правило спасает весь тюнер ,так как он на себя замыкает повышенное напряжение , возрастает ток и перегорает предохранитель , а блок питания и сам ресивер остаются целыми. Ремонт тюнера на примере Orton Такой ремонт вы можете сделать своими руками сами. Потратив на это копейки. И сэкономить деньги. Полезные вещи в вашу мастерскую Пока распродажи - Недорогие и полезные вещи в Вашу мастерскую: Большой выбор Ковриков для пайки http://alli.pub/6i2wcm Коврик для пайки отличная цена http://alli.pub/6i2wup Не держись за вчерашний день. Выбери современный блок питания. Покуда есть скидки: https://www.aliexpress.com/w/wholesale--Newly-DC-Power-Supply-.html?af=3976639_1&afref=&cn=45sejwhxd40oforqnr63tpzhgub5tks4&dp=v5_45sejwhxd40oforqnr63tpzhgub5tks4&cv=43579064 Лабораторный Блок Питания на 120V/60V/30V 10A http://alii.pub/6i1ar2 Лабораторный БП на 120V/60V/30V 10A KUAIQU http://alii.pub/6i1bjn DC-Dc 5A по отличной цене http://alii.pub/6hztvg DC-Dc 5A_ по отличной цене http://alii.pub/6hzu31 Мультиметр с возможностью подключения к смартфону по Bluetooth https://alli.pub/6i9rq6 Цифровой Мультиметр Mileseey NCV http://alii.pub/6i0n46 Цифровой Мультиметр MESTEK DM90 http://alii.pub/6i0na7 Цифровой Мультиметр NJTY Smart Ultra-thin http://alii.pub/6i0r6z Лабораторный БП на 120V/60V/30V 10A http://alii.pub/6i1ax3 Лабораторный БП на 120V/60V/30V 10A KUAIQU http://alii.pub/6i1bab Если есть желание помочь каналу КАРТА Приват Банка 4731 1856 0516 2525 © Мой Сайт http://schip.com.ua/ © Мой Телеграмм Канал Азбука РАДИОСХЕМ https://t.me/azbuka_radioshem

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