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Как сделать из компьютерного блока питания - регулируемый блок питания.

Как сделать из компьютерного блока питания - регулируемый блок питания.

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Регулятор напряжения и тока со стабилизацией и без платы

Регулятор напряжения и тока со стабилизацией и без платы

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Линейный Лабораторный блок питания. Своими руками

Линейный Лабораторный блок питания. Своими руками

Channel: Treicer100 Электроника без МК

Переделка фонаря на Li-Ion

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Мини лабораторный блок питания своими руками

Мини лабораторный блок питания своими руками

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Ремонт блока питания - зарядного устройства !

Ремонт блока питания - зарядного устройства !

Channel: Ремонтер-любитель

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блок

00:00:00

friends Hello everyone, in today's video

00:00:02

I want to show how from such a

00:00:05

computer power supply you can

00:00:08

make a charger for any

00:00:12

type of battery, we are talking,

00:00:15

of course, about car

00:00:16

batteries for a motorcycle, you can

00:00:20

charge lithium-ion batteries, that

00:00:23

is, any that for this we need, we

00:00:27

will need a computer power supply on

00:00:31

a chip tl490 494 or its analogues to

00:00:37

75 0 I have such a branded

00:00:42

Microlab unit for 350 watts is good.

00:00:45

Well, first you need to make sure that it is

00:00:48

working, if it is not working for you, then

00:00:50

first you need to repair it,

00:00:54

turn on its

00:00:56

network

00:01:01

[music]

00:01:13

close the green black wire and we look at the

00:01:18

voltage,

00:01:21

so 12 volts, 12.4 is too high, but it does

00:01:27

n’t matter 52, let’s see the

00:01:30

standby voltage, the

00:01:33

standby voltage is also fine, this unit is

00:01:36

fully operational,

00:01:40

now we’re going to redo it,

00:01:44

so the first thing we need to do is

00:01:48

unscrew it first, I’ve already unscrewed it

00:01:52

the bolts then you will need to remove the board,

00:01:57

see here there is a good board, large

00:02:03

radiators, good chokes there. I see

00:02:06

a little bit of

00:02:10

some strange nozzles leaking here. But

00:02:13

this is not important to us. So, for starters,

00:02:17

we take all this out of the case. Now I

00:02:19

will take it all apart. You will continue to

00:02:23

take it out. from the case, this block

00:02:27

PWM controller for 7500 is what we need

00:02:31

or TL 490 494

00:02:36

this is a good block transistors

00:02:39

1309 large I don’t know it’s visible there it’s not visible the

00:02:42

radiators are closed

00:02:45

on this side here I got a block

00:02:47

filled with some kind of rubber I

00:02:50

tried to tear it off but I

00:02:52

can’t do anything Well, it won’t interfere with us,

00:02:57

this part is separated by a wide

00:02:59

strip. We

00:03:03

don’t go into the hot high-voltage part, we will

00:03:06

make adjustments on the low-voltage

00:03:09

part.

00:03:11

So now we need to get rid of everything

00:03:15

unnecessary, first we need to desolder this whole

00:03:19

wiring harness

00:03:22

and all the inductor capacitors, these

00:03:26

resistors are

00:03:29

12 volt 5 volt 3 volt

00:03:33

Lines, completely desolder everything now I will

00:03:36

desolder it partially then I will show you how it

00:03:38

should work out

00:03:42

like this, I dropped out

00:03:44

the parts that are interfering with us, this is a bunch of it

00:03:48

turned out,

00:03:51

plus or minus, we could also desolder

00:03:54

this

00:03:56

lm339 microcircuit We won’t need it anymore either.

00:03:59

This whole part could have been

00:04:01

desoldered. I simply

00:04:04

don’t need these parts, I’m too lazy to desolder them,

00:04:06

they won’t interfere; you can just

00:04:09

desolder the electrolytes so they do

00:04:12

n’t interfere with work, that’s

00:04:15

all. We don’t need to leave

00:04:19

three diode assemblies here yet. it was

00:04:24

under 5 volts, 12 volts and 3

00:04:28

volts here

00:04:30

30 amperes 40 Volts 10 amperes 100 Volts and

00:04:36

20 amperes 45 Volts from these three We

00:04:41

only need this 10 amperes 100 Volts there should

00:04:44

be a

00:04:46

voltage of at least a hundred, better even

00:04:49

200 Volts

00:04:51

that is these 40 volt assemblies,

00:04:54

although they have more current, are not suitable for us,

00:04:57

that is, I will now unscrew them,

00:05:06

remove them from here

00:05:18

and leave them in the same place that was

00:05:23

even in the same position,

00:05:26

this diode assembly, which was 12V each,

00:05:31

so we also remove the side they on mine, you

00:05:34

won’t need it anymore

00:05:36

with a radiator for now, too, to the side.

00:05:41

So I also wanted to say something important. I

00:05:44

don’t know how to show it on the camera. It

00:05:47

will be visible or not visible, most likely it won’t be visible,

00:05:51

but there are two electrolytic capacitors in the bases of the transistors;

00:05:55

they are if the

00:05:58

unit is already old usually they no longer

00:06:02

dry out, they are large and it is advisable to

00:06:06

replace them because of this the unit may not

00:06:09

work well just for these two small

00:06:11

capacitors, they usually stand there

00:06:14

at 50 volts and can be from 1 to 10

00:06:18

microfarads, you can put anything from

00:06:22

one to ten microfarads nothing It

00:06:23

won’t be terrible if you install not

00:06:27

exactly the one that was there and

00:06:30

I’ll show them to you. Then

00:06:34

So now I’ll do this, I’ll get these

00:06:38

electrolytes, replace them then we’ll continue,

00:06:47

I somehow unsoldered these two

00:06:50

capacitors here 50 volts 10

00:06:53

microfarads, there’s

00:06:55

no way I can get to them I decided, well, I

00:06:58

took away the

00:06:59

transformer pigtail itself, they

00:07:02

desoldered it, just desoldered the legs, bent them to the

00:07:05

side, here they are installed

00:07:10

here, instead of them, I will put them

00:07:15

with low resistance, there must be

00:07:17

capacitors,

00:07:20

the word esr must be written, preferably 105

00:07:23

degrees, so I have 4.7 microfarads

00:07:26

and 50 volts Let's check these

00:07:32

capacitors that were on the

00:07:37

tester, let's see

00:07:40

esr 1 and 5 Ohms, this is still acceptable,

00:07:45

but it's better to replace it

00:07:49

like this, I soldered it back, I

00:07:55

put the new capacitors back in place, put the transformer back in its place,

00:07:58

now we'll continue to

00:08:02

assemble the

00:08:04

input line, which means we'll redo it like

00:08:08

this

00:08:11

I’ll attach the diagram

00:08:16

if anyone needs it, look at

00:08:22

it, now we’ll install a

00:08:27

radiator with a diode with a Schottky diode in place. But

00:08:33

I’ll also install a crank here for it.

00:08:36

I have an

00:08:41

l7812 stabilizer. The switching diagram is also here,

00:08:46

I’ll put it right on the radiator too

00:08:49

so it’s convenient

00:08:52

and install it it is needed here for what purpose, to

00:08:57

connect a

00:09:00

Volt ammeter and to connect a

00:09:03

cooler,

00:09:07

since from this block we have a duty transformer coming out of this unit,

00:09:12

here it is, the duty transformer,

00:09:14

here it is, the main voltage here is 5 Volts, the

00:09:20

reference voltage comes from this,

00:09:23

and the second voltage to the power supply of the PWM

00:09:27

controller goes through this this one if

00:09:30

you can see A

00:09:31

small diode, well,

00:09:36

there can be a voltage from 8 to 30

00:09:40

volts

00:09:42

Well, I’ll install

00:09:44

a stabilizer right away so that I don’t have to suffer later,

00:09:48

if there is voltage there, let’s say there’s

00:09:51

17 volts there, then that’s obviously a lot for a

00:09:56

cooler so that later I don’t have to split hairs, but

00:10:00

I install this one right away stabilizer

00:10:01

if you don’t have one or you have a

00:10:08

second voltage coming out The supply voltage there is around

00:10:14

12-14 volts then it’s not needed so I’ll

00:10:18

install

00:10:23

a stabilizer then you’ll need to wind up all the extra windings from this

00:10:27

inductor that we desoldered from this

00:10:30

block,

00:10:31

that is,

00:10:35

here there was a double 5 volt thick

00:10:38

Another minus 5 minus 12

00:10:42

We don’t need all this anymore I’ll leave only the winding

00:10:45

that was 12 volts

00:10:49

I won’t rewind anything I think

00:10:52

8 amperes will be enough now I’ll

00:10:57

unwind all the excess

00:10:59

then we’ll collect it

00:11:03

so I soldered it in place The

00:11:11

joke diode installed

00:11:15

the stabilizer while I didn’t connect it anywhere,

00:11:18

then I’ll connect it to the

00:11:21

voltage of the control room, I’ll show you where

00:11:24

I soldered

00:11:28

the radiator back, now we need what we need, now we

00:11:31

need to return it back

00:11:35

to the line plus 12 volts.

00:11:39

Here it is, that is,

00:11:45

here I have it,

00:11:48

install this inductor from which

00:11:52

I’ve already wound up the extra windings, leaving

00:11:57

only one that was at plus 12

00:12:01

volts, I’ll install it back

00:12:06

here

00:12:09

[music]

00:12:10

so

00:12:18

I’ll install it then I’ll need to

00:12:22

install an electrolytic capacitor

00:12:24

on the capacitor that was in it 16

00:12:28

Volts

00:12:30

1000 microfarads will no longer work, we

00:12:33

need at least 35 Volt, here I have

00:12:36

a capacitor of

00:12:37

1000 microfarads 35 Volts

00:12:41

because the voltage in the power supply

00:12:46

will now be about 25 Volts

00:12:50

and we also need to install a

00:12:53

load resistor, we

00:12:58

need to take it Well,

00:13:01

preferably a two-watt one with a

00:13:04

nominal value Well, this one I have is

00:13:09

460 ohms, but it’s better to have a smaller one somewhere

00:13:13

390 it will be just right I do

00:13:17

n’t have one right now Well, this will also work,

00:13:20

now we solder it all to the line

00:13:23

plus 12 volts, the former line plus 12 volts, this is how

00:13:29

I assembled it, which means the

00:13:32

output line, that is, after

00:13:36

the transformer we have a Schottky diode, then

00:13:39

a choke, then an

00:13:43

electrolytic condensate

00:13:44

smoothing here I had

00:13:47

another intermediate

00:13:49

inductor like this, I put it back, I put

00:13:51

another capacitor in. Well, in principle,

00:13:54

one electrolyte is enough, I decided

00:13:57

to put two

00:14:00

and a load resistor like this with the output

00:14:04

line.

00:14:05

That is, if you look at this diagram with

00:14:08

this part We're done

00:14:12

Now we will work directly with

00:14:16

our

00:14:18

tl494 controller or to 75 0 as in my case,

00:14:29

so the first thing we need to do is

00:14:33

make our power supply

00:14:36

turn on automatically.

00:14:40

To do this, we need to find the fourth

00:14:42

leg of the PWM controller, many of the PWM

00:14:45

controllers are considered here, you

00:14:48

can see there is no there is such a slot at

00:14:52

the bottom and from left to right 1 2 3 4 5 6 7 8

00:14:59

further 9 10 11 12 13 14 15 16 here

00:15:04

it turns out we need to find the fourth

00:15:07

leg and plant it on the ground 1 2 3 Here

00:15:12

it is 4th leg

00:15:17

separate from it plant it on the ground

00:15:21

see where it goes it goes and should

00:15:25

come

00:15:28

to the resistor and zener diode, here

00:15:33

the resistor and zener diode

00:15:36

need to be desoldered too. So

00:15:41

we put the fourth leg on the ground,

00:15:46

then what we do is we need to find the

00:15:50

sixteenth leg as well. It should not

00:15:53

be connected to anything at all. It

00:15:57

should also be

00:15:59

on the Earth.

00:16:02

there it is here, here it is 16 leg

00:16:06

I have some kind of resistor here, we

00:16:10

remove it here,

00:16:12

we remove another resistor here too, we remove it and

00:16:30

I already have it. This is the path that goes to the ground, but for some reason it is broken here, so I’ll just close it here and

00:16:33

I’ll put everything on the ground 16 the leg should be

00:16:38

on the ground there shouldn’t be anything hanging on it

00:16:41

then 15 the leg of the PWM controller it is

00:16:44

soldered together with the 13 and 14 legs you need to 15

00:16:51

separate the leg from 13 and 14 pull it out. It also

00:16:55

shouldn’t touch the 13 14 leg or

00:16:59

cut it off Somehow, very carefully,

00:17:01

or I just pulled it

00:17:06

out here, but in this way you can break

00:17:09

the leg,

00:17:10

but I will do it this way now, I will

00:17:15

do it all,

00:17:18

then I will show you what to do next, I

00:17:23

put a jumper between the 16th leg on

00:17:27

the ground, the

00:17:28

fourth leg is also on the ground, here I am

00:17:32

found

00:17:35

Well, now to make an

00:17:38

adjustable voltage adjustment

00:17:42

we need to find a resistor that

00:17:46

is located between

00:17:48

13 14 and 2 legs of our microcircuit, here it is

00:17:55

here, I have it,

00:17:58

it is usually always close. This

00:18:01

resistor is usually 47 kilo-ohms

00:18:08

on almost all the blocks that I

00:18:11

have seen it was

00:18:17

marked r27 on the board. Well, I don’t know how it will be here,

00:18:22

but the fact is that it is between 13 14 2

00:18:26

legs, we need to unsolder this resistor

00:18:30

and in its place install a variable

00:18:34

resistor at 5 ohms, this

00:18:36

means this resistor, how do we solder

00:18:41

this leg

00:18:44

to this ground leg on the

00:18:48

second leg of the

00:18:51

microcircuit and this leg on the 13 14

00:18:55

leg of the microcircuit,

00:18:57

but in order not to pull a bunch of extra wires,

00:19:01

I will make

00:19:06

two resistors at once, this resistor 2

00:19:09

will be responsible for adjusting the current, we have it

00:19:13

for 10 kilo-ohms, we will also need

00:19:16

this one to the ground and this pin is on 13 14

00:19:21

And this one is already Central, I’ll show you where next.

00:19:26

So, now we’ll solder

00:19:33

it like I said, I soldered off the resistor

00:19:36

between

00:19:38

13 14 2 legs, I have it here R18

00:19:42

But usually they are like I said p47

00:19:47

So now for this in place of this

00:19:49

resistor we will solder this

00:19:52

variable resistor for 5 kilo-ohms.

00:19:55

The central one with its 2nd leg, with this leg

00:20:00

on the left, with this leg to 13 14 And the right

00:20:03

leg to the ground. So I immediately 10

00:20:08

kilo-ohms and threw the same ground to this

00:20:12

wire and at 13 14 I did this then

00:20:16

We will also solder the Central one to regulate the

00:20:19

current,

00:20:20

so now we will solder this resistor and, in

00:20:25

principle, to regulate the voltage, we

00:20:28

will continue to adjust the

00:20:30

flow,

00:20:33

so I soldered our resistor,

00:20:36

this is how it turned out

00:20:39

Earth 2 13 14 and so on we will do the

00:20:45

current adjustment

00:20:48

so that we get the adjustment

00:20:50

flow, we need this pigtail, the

00:20:53

central

00:20:57

midpoint of the transformer. Here it

00:21:00

comes out here, cut it

00:21:07

and install a Shunt on it. That is, I have

00:21:12

here, you see, from the pigtail there are two

00:21:16

such jumpers here to the negative bus, I have

00:21:20

these jumpers, I have them. Just you

00:21:24

and him instead of this jumper I will already

00:21:28

install

00:21:30

this wire here is the Volt ammeter

00:21:34

so as not to solder the Jester, do not

00:21:37

solder anything here already in these Chinese

00:21:39

Volt ammeters the Shunt is built in, which

00:21:43

means we solder the

00:21:48

black one closer to the pigtails the black wire the

00:21:51

red wire is closer to the output

00:21:56

so

00:21:58

but I have these jumpers here there

00:22:01

may be a block of you here I found I have

00:22:04

such a scarf there is a

00:22:07

pigtail here and here there is a solid 1 tire that goes

00:22:12

that is You see here I have already

00:22:14

started to do something with it something is wrong with it I

00:22:17

haven’t finished it so I see I

00:22:21

simply cut this entire

00:22:23

bus, so it went here and here I

00:22:26

also cut it off And I also cut it off here, that is, it

00:22:30

should be in this place. The Shunt is installed,

00:22:35

roughly speaking, if you look at this board, the

00:22:46

Shunt should be installed in this way,

00:22:52

that is, like this

00:22:54

up to the pigtail and after the pigtail before the cut and

00:22:59

after

00:23:01

also

00:23:03

closer to the box of the transformer near the

00:23:07

braid itself, well, where we will insert it, I will have

00:23:13

this wire standing here in one place. And from 2, where the second

00:23:18

hole is, I will need to

00:23:20

bring out another wire to

00:23:24

limit for adjusting the

00:23:27

maximum current limit,

00:23:30

so now I will solder these wires and

00:23:34

bring out this wire

00:23:38

so that after that we will need to

00:23:43

solder

00:23:50

another ordinary resistor with a

00:23:54

nominal value of 5 to 10 kilo-ohms on this resistor here on the central leg 78

00:24:00

kiloohm Well, it doesn’t matter much difference it wo

00:24:04

n’t play

00:24:07

like that and after this resistor

00:24:11

we’ll also solder the wires here and

00:24:15

then I’ll show how these wires

00:24:18

will be connected

00:24:21

so I soldered it, I mean this wire I

00:24:25

unsoldered these jumpers that were

00:24:29

soldered the wire also soldered the wire from the

00:24:33

pigtail here solder only the

00:24:36

limiting resistor,

00:24:38

the resistor that limits the

00:24:40

maximum current of

00:24:45

this device, I also soldered the

00:24:48

stabilizer, found it here. Where the voltage comes out,

00:24:54

I’ll tell you from the pinout, the first leg of the

00:24:58

stabilizer is the input. The

00:25:02

central leg is the ground and the third leg

00:25:05

is the output. I brought it here, the

00:25:08

cooler will be connected here, and here it is.

00:25:13

this Chinese

00:25:17

meter

00:25:19

also soldered the resistance here,

00:25:23

I have 47 kilo-ohms, I think there will be

00:25:26

enough wiring, now I’ll put on some

00:25:29

heat shrink so that it’s neat,

00:25:32

and then we’ll need to connect it all

00:25:37

to leg 15, that is, solder

00:25:43

the resistor here, put the resistor here, you

00:25:46

need to select it or put a

00:25:49

variable one a resistor for one kilo-ohm and

00:25:52

start small there somewhere, set it

00:25:56

somewhere at 100 to 150 200, but I’ll put a

00:25:59

regular resistor at 250 ohms.

00:26:03

Approximately this will

00:26:05

limit the current strength to about 8-9 amperes,

00:26:09

I’ve already tried it. I know, I

00:26:14

’ll solder it here this resistor and all this

00:26:18

should be soldered to the 15th leg, another

00:26:24

15th leg between 15 and 3rd leg, more precisely, you

00:26:29

need to make an RC chain, that is, the 15th

00:26:34

leg still needs to solder a resistor. Well,

00:26:39

the resistor also needs to be selected. But usually

00:26:42

there is from 20 to 100 Ohms, also on the 15th leg

00:26:49

and the second

00:26:52

to the second leg is an

00:26:54

ordinary

00:26:57

ceramic capacitor, but I had a

00:26:59

Soviet Capacitor lying around here. But if you take

00:27:02

ordinary capacitors like this, then

00:27:05

104 will be written on it;

00:27:11

we solder this capacitor to the third leg, that is, between 15 and 3 legs of the

00:27:15

RC the circuit should be

00:27:19

like this and that all this is on one leg. Don’t hang it up,

00:27:22

I’ll bring out another such wire and I’ll twist

00:27:26

this whole place to this wire like this

00:27:30

and I’ll solder the RC directly

00:27:35

on the controller itself;

00:27:40

I’ll solder everything in place and solder this

00:27:44

wire. The central one is here.

00:27:48

connected to the 15th leg, here is the wiring from the

00:27:53

15th leg, connected here, the resistor is

00:27:57

only limiting, it limits the

00:28:00

maximum current strength,

00:28:03

it goes to the transformer braid, also made an

00:28:07

RC circuit, here is the resistor, capacitor on the

00:28:11

third leg, connected the leads,

00:28:16

connected

00:28:18

the stabilizer, here is the wire from it for now

00:28:22

brought out for the operation of the ammeter Also

00:28:25

needed here will connect the cooler Well, for now, without

00:28:28

a cooler, I’ll

00:28:30

try, so to speak, I’ll do a trial, so to speak, the

00:28:33

first turn on of nothing I hope everything won’t

00:28:38

explode, everything will be fine

00:28:40

and at this point the alteration can be considered

00:28:43

completed, then

00:28:46

we’ll pack it all into the case Whoever likes it as you

00:28:48

like

00:28:53

Okay now We’ll try to do the

00:28:57

first turn on, the first turn on will

00:28:59

definitely be done Via a safety

00:29:03

lamp, that is, in a break in some wire,

00:29:06

or instead of a fuse, you need to

00:29:09

install an incandescent lamp with a power of

00:29:13

Well, at 60

00:29:18

So now I’m connecting and We’ll

00:29:20

try this way I connected the network

00:29:23

wires like this, I just tied it up a little, I’m just

00:29:26

violating safety precautions a little Well, it’s

00:29:31

advisable for you to do everything carefully and this is

00:29:34

not the first time I’ve done insulation.

00:29:37

I think nothing bad will happen and so

00:29:40

we do the first switching on. We place bets whether it will

00:29:43

go off or not, turn on the

00:29:45

network

00:29:50

and the light came on and went out great, so

00:29:55

the regulators were turned off

00:29:58

to zero on the left side, we try to

00:30:00

slowly add, we

00:30:04

add

00:30:07

voltage, it is adjusted

00:30:16

15 16 17

00:30:25

24

00:30:28

3 9 volts 24 volts

00:30:33

maximum voltage is excellent,

00:30:43

so now let’s

00:30:46

connect the load, connect the lamp, an

00:30:51

ordinary incandescent lamp like this,

00:30:55

connect it, let’s see

00:30:58

how it behaves,

00:31:11

that’s great

00:31:13

[music]

00:31:19

one thin thread is disconnected

00:31:23

0 3 amperes only consumption, the

00:31:29

current limitation also works, you can see

00:31:33

that the

00:31:34

current regulator works

00:31:36

current limitation

00:31:45

So

00:31:48

I've run out of memory on my phone,

00:31:51

so let's continue, let's try to

00:31:53

connect more voltage, more current 5

00:31:57

turn on

00:31:59

everything is fine, let's try to use the

00:32:02

second thread You

00:32:11

see 06 amperes,

00:32:18

the light bulb is just starting to flare up.

00:32:20

It's inconvenient for me. Now I'll take some kind of

00:32:24

crocodile clip that's more convenient.

00:32:33

There's nothing like that at hand. I’ll take the crocodile and

00:32:38

throw it here

00:32:41

and

00:32:42

I’ll keep it here, look

00:32:45

[music]

00:32:49

So it’s not like

00:32:57

that 06 Ampere

00:33:00

I don’t know Whether you can see it or not Let’s

00:33:04

probably do it like this

00:33:06

06 ampere the voltage sank I add

00:33:10

current

00:33:11

1.3 1.4 parallel to this light bulb my

00:33:16

safety lamp lights up and won’t let me

00:33:18

raise it anymore You see, I add current automatically, it

00:33:21

resets because there is a lot of

00:33:23

consumption.

00:33:26

Well, that’s actually all. The whole alteration of the

00:33:30

current, look, I’m removing it to zero, I’m making a

00:33:35

short circuit

00:33:37

to zero, that is, the limitation only

00:33:40

works, I’ll add a little bit, I’ll make it

00:33:43

short

00:33:45

04 amperes, I’ll also do it a little bit, I’ll add it,

00:33:49

I’ll do it short

00:33:50

09 amperes all restrictions only work

00:33:54

voltage regulation works

00:33:58

So now

00:33:59

we pack the whole thing into a case Well, in the

00:34:04

case someone already has someone who wants it

00:34:08

and

00:34:09

put it in. If something was

00:34:13

not clear then

00:34:16

write or

00:34:19

look there is a channel called repair

00:34:24

an amateur, he makes blocks exactly the same way

00:34:28

I basically do everything Well, I watched almost everything from

00:34:32

him

00:34:35

That is, he has all the videos in great

00:34:39

detail, everything is chewed up in great detail if I

00:34:41

don’t understand something you can look at it

00:34:44

Bye everyone If you liked the video Like it and

00:34:48

subscribe to the channel Bye

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подробное видео о переделке компьютерного блока питания в зарядное устройство с регулировкой напряжения и тока ( лабораторный блок питания) схема переделки https://dzen.ru/a/ZYyWUioEzhElPAdo?share_to=link

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