In this article, I want to expand and show in the photo my laboratory living block, which I have chosen block by block, on ready-made modules from Aliexpress. About these modules themselves, I already rozpovidav okremo on the site. I wanted to build a simple, superior, affordable block, with the necessary parameters and small dimensions. Having marveled at a couple of videos about similar blocks on the Internet, having installed the necessary modules and choosing it myself. On the back of the head, like a dzherelo zhivlennya, it was zastosovano of the transformations of the PSU computers. Ale, so like me, so I didn’t get far enough to get into a new normal robot (when you get a lot of weight, and you don’t reach the maximum rosrachunk strum), it’s taken on the same Aliexpress. The maximum operating voltage for the unit in the largest voltage range is 0-30 volts, although there was an idea to work from 0 to 50 volts. Dzherelo zhivlennya, like I zasosuvav, vіddaє 36 Volt and strum up to 5 Amperes. The intensity of 180 watts is enough for my bosses. Yak a voltage regulator and a struma (obezhennya), vikoristovuvav. As a protruding indicator, the module as a housing for blockage is a typical plastic housing type Z1 (70x188x197 mm). In principle, these modules are already enough for a lab worker, but I added here, in order to put 5 Volts on the USB sockets on the front panel. We also need a pair of 10K wine change resistors, a toggle switch for plugging/unplugging life, a pair of USB jacks (I took a double jack), that pair of banana jacks for connecting an output cable. We fix the modules in the middle of the case, we distinguish that drilled front panel.

Then we solder the resistors from the module and solder the resistors on the wires of a sufficient length (I put 10 K resistors on 1 K, for accurate tuning, the process did not give a particular effect). Well, let's go back to all the modules from the diagram.

If you're using USB, don't forget to plug in the 5V LM2596 module. I should pay attention to the fact that the negative USB wire is taken not from the LM2596 module, but from the PSU output mask (from the negative "banana"). It is necessary for that, if you connect it to the USB block, you will get a good stream. I can mark one more module in the photo of my block - the same DC-DC, I want to replace the LM2596 with USB as a livelihood, but to make the unfriendly mode unfriendly, so I left the LM-ku. I also have a fan. If you also want to have a fan unit, then choose the one for the dimensions and for a voltage of 5 V. Connect the pins to the plus and minus of the LM2596 module (in this case, the minus is taken from the module type, otherwise the indicator constantly shows the strum fan cooling). The next time the rajah is turned on, it is carried out through a 40-60 W heating lamp. If it's not like that, you'll miss the fireworks at every turn. I got the block back once and while there were no problems with it during the day.

kirich46 write on 26 April, 2015

-30V 2mA - 3A Adjustable DC Regulated Power Supply DIY Kit Short Circuit Current Limiting Protection Price $10.39
The item was taken free of charge for inspection

I may be weak to be-any blocks of life, immediately looking around two in one. This time, there will be a look at the radio designer, which allows you to choose the basis for the laboratory block of living and that option for real implementation.
In advance, there will be a lot of photos and text, so stock up on cava :)

For the cob, I will explain a little bit what is so and what is happening.
May all radio amateurs beat their robots like a laboratory block of life. It's all foldable with software management, but it's simple on the LM317, but all the same vikonu may be the same, to live different adventures in the process of working with them.
Laboratory living blocks are divided into three main types.
With impulse stabilization.
With linear stabilization
Hybrids.

First, you can have a pulsed heating block at your warehouse, or just a pulsed block of life with a lowering PWM switch.
Advantages - great tightness with small dimensions, Vіdminny KKD.
Nedoliki - HF pulsations

Others can't be on board every day PWM, all adjustments are made in a linear way, where too much energy is generated simply on the regulating element.
Pluses - practically no ripples, no consumption in capacitors at the output (mayzhe).
Minuses - KKD, mass, size.

Thirdly, if the first type is confused with another, then the same linear stabilizer will live in the led lowering SHIM switch (the voltage at the output of the SHIM switch will start to be adjusted on a equal footing of the trochi more lower in the day, it will be possible for the transistor to regulate the operating mode.
Or a whole-line power supply unit, but the transformer has a few windings, which are switched on when necessary, thereby changing the cost on the control element.
There is only one minus for the scheme, folding, there is more than one for the first two options.

Today we’ll talk about another type of life block with a control element, which works in the linear mode. But let’s look at this block of life on the butt of the designer, I’m wondering how it can be like that. Aje, in my opinion, is a garniy cob for a radioamator-cob, choose one of the main accessories.
Well, otherwise, as it seems, the correct block of life is to blame for the important ones :)

Tsey looking around for more orientations on the beginnings, the comrades' knowledge is unlikely to be known to anyone else.

Having asked for a look at the constructor, which allows me to select the main part of the laboratory block of life.
The main characteristics of the following (from the statements of the store):
Input voltage - 24 Volts
The output voltage is regulated - 0-30 Volt of the constant stream.
External control jet - 2mA - 3A
Output voltage ripple – 0.01%
Rozmіri drukarskaya plai - 80x80mm.

Trohi about packaging.
Priyshov constructor for a special polyethylene bag, windings for soft material.
The anti-static bag with a drawer had all the necessary components, including the additional board.


In the middle, everything was thick, but when it didn’t hurt anything, the handy board often protected the radio components.


I don’t overthink everything that is included in the kit, it’s easier to work it out later, I’ll look around, I’ll only say that I’ve got everything, I’ve lost everything.


Trochs about the fee.
It's like a miracle, the scheme is not included in the kit, but all the nominal values ​​are marked on the board.
The board is double-sided, covered with a sour mask.

Pay for cover, ludіnnya, that very same textolіtu vіdmіnna.
I had only a few in one place to break a patch from a friend, and then after that, if I tried to solder a non-trivial detail (why, bude).
At my own glance, for a radio amateur-pochatkivtsya, it will be important to zip.


Before installation, I crossed the scheme of which side of life.


The scheme to finish is thought out, although not without shortcomings, but we will tell about them in the process.
At the scheme, a sprat of the main knots is visible, their coloration is recreated.
Zeleny - vuzol regulation and stabilization of the voltage
Chervoniy - vuzol regulation and stabilization of the struma
Violet - vuzol _indication of the transition to the mode of stabilization of the stream
Blue - dzherelo reference voltage.
Okremo є:
1. Input diode and filter capacitor
2. Power regulating vuzol on transistors VT1 and VT2.
3. Zahist on transistors VT3, which turns on the output, the docks of life of the operating subsidiaries will not be normal
4. Stimulation fan life stabilizer on microcircuit 7824.
5. R16, R19, C6, C7, VD3, VD4, VD5 Through the presence of this node, the power supply unit is not practicable just in the form of a permanent stream, the very input of a changeable stream from the transformer is necessary.
6. С9 output capacitor, VD9, output diode.


I will write down the odds and the shortcomings of the circuit solution.
Plusy -
Silence the presence of the stabilizer for fan life, but the fan is consumed at 24 Volts.
Even quieter the presence of a life of negative polarity, which will greatly improve the operation of the power supply unit on streams and voltages close to zero.
At the connection with the presence of a negative polarity, a zahist was introduced into the circuit, while there is no voltage, the output of the power supply will be switched on.
BP to take back the reference voltage of 5.1 Volts, which allowed not only to correctly regulate the output voltage and strum (with such a scheme, the voltage and strum are regulated from zero to the maximum linearly, without "humps" and "failures" at the extreme values), but it is possible to the block of life is calling, just changing the voltage of the carousel.
The output capacitor is too small, which allows you to safely change the light, there will be no discharge of the stream, the docks of the output capacitor will not be discharged and the PSU will not enter the stabilization mode of the stream.
The output diode is necessary for the protection of the power supply to supply voltage of the reverse polarity. True, the diode is too weak, better replace it with another one.

Minuses.
The strumovimiruvalny shunt can be too high opir, so when working with a strum, the voltage of 3 Amperes on the new one is seen close to 4.5 watts of heat. Resistor razrahovaniya 5 watts, but the heating is even greater.
Input diode dialing place from 3 Ampere diodes. For a good reason, diodes stand at least 5 Amperes, so that the strum through diodes in such a scheme is 1.4 out of the output, it can be 4.2 Amperes in a robotic stream through them, and the diodes themselves are protected by 3 Amperes. The situation is easier for those who bet diodes at the bridge to work on their own, but all the same we don’t know it right.
The great minus is that the Chinese engineers, when selecting operational voltages, chose an op-amp with a maximum voltage of 36 Volts, but they didn’t think that in the circuit there was a negative voltage and the input voltage in this variant was cut at a level of 6-35 Volts (13-31 Volts) . With an input of 24 volts, the current will be close to 32-33 volts.
Tobto. The OS is applicable to the foreign regime (36 ce maximum, staff 30).

I’ll tell you more about the pluses and minuses, as well as about the modernization of the future, and at once I’ll move on to a better folding.

For the cob, we lay out all those that are included before the kit. It’s easier to fold, that one will simply be clearly visible, what has already been installed, and what has been lost.


I recommend that you start folding from the lowest elements, to the one who puts the temples on the back, then it will be awkward to put them low.
It is also faster to install components that are more similar.
I will start with resistors, and there will be resistors with a nominal value of 10 KOM.
Resistors akіsnі and can be accurate 1%.
Dekilka sl_v about resistors. Resistors may have color marking. Bagatiom tse can be handicapped. In fact, it’s shorter than the lower alphanumeric marking, so it’s visible in any position of the resistor.
You don’t have to swear by color marking, at the cob stage you can use online calculators, but sometimes you can choose it already and without it.
For understanding and handy work with such components, you need only memorize two words, like a radio amateur-pochatkіvtsyu need in life.
1. Ten main colors of branding
2. Rated in the E24 series, the stench is not needed when working with precise resistors in the E48 and E96 series, and yet the resistors are rated more appropriately.
Whether it be a radioamator from the dosvidom pererahuє їх just from memory.
1, 1.1, 1.2, 1.3, 1.5, 1.6, 1.8, 2, 2.2, 2.4, 2.7, 3, 3.3, 3.6, 3.9, 4.3, 4.7, 5.1, 5.6, 6.2, 6.8, 7.5, 8.2, 9.1.
Reshta denominations є multiplied by 10, 100, etc. For example 22k, 360k, 39ohm.
What information is given?
And if there are those that are a resistor to the E24 series, then, for example, a combination of colors -
Blue + green + yellow is impossible for him.
Blue - 6
Greens - 5
Zhovtiy - x10000
tobto. 650k go behind the roses, otherwise there is no such denomination in the E24 series, or 620 or 680, it means that the color of the recognitions is wrong, or the color of the changes, or the resistor is in the E24 series, but it remains rare.

Garazd, finish the theory, let's move on.
Before installation, I form the resistors of resistors, call for additional tweezers, and then beat for a little self-confidence.
Scraps of visnovkiv are not in a hurry to find out, buvay, that stench can become good for jumpers.


Having installed more I went to single resistors.
Here it can be more important, it is more often possible to sort out the denominations.


I don’t solder the components, but I just bite and die the vines, and I bite the back myself, and then I die.
It's easy to fight, the board is trimmed in the left hand (like you are right-handed), the components are installed at once.
At the right hand, there are bokorizi, we bite the visnovki (and nave in a row several components), and the side of the bokoriziv in the fold of the visnovka is folded.
It’s all too fast to fight, after another hour it’s already on automatism.


Axis and went to the rest of the resistor, the nominal value of the necessary and the one that is left out, runs, it’s already bad :)


Having installed the resistors, we pass to diodes and stabilitrons.
There are some more diodes here, the most popular ones are 4148, two zener diodes for 5.1 Volts are leather, so it’s very important to get lost.
We also form visnovki.


On the board, the cathode of meanings is smug, like on diodes and zener diodes.


If I want to pay and I can put on the mask, but I still recommend wrapping the visnovki so that they don’t put the stench on the paths, so the order was given, in the photo the diode was shown at the front of the path.

Stabilizers on boards are marked as well as markings on them - 5V1.

There are not too many ceramic capacitors in the circuit, but their marking can confuse the radioamator-pochatkivtsya. Before speech, it is also under the order of E24.
The first two digits are the denomination in picofarads.
The third digit is the number of zeros, which must be added to the face value
Tobto. for butt 331 = 330pF
101 - 100pF
104 - 100000pF or 100nF or 0.1uF
224 - 220000pF or 220nF or 0.22uF

The main number of passive elements is installed.

After that, we proceed to the installation of operational subsidies.
Without a doubt, I would recommend buying panels before them, but I soldered it like є.
On the board, like on the microcircuit, the first vysnovok is designated.
Other vysnovki vvazhayutsya against the year's arrow.
In the photo you can see the place under the operational pidsiluvach and those who can be placed.

At microcircuits, I don’t kill all the frills, but only a couple, sound only the last bells of any diagonal.
Well, it’s better to bite them like that, so that the stench was erased by about 1mm above the board.

Everything, now you can go to soldering.
I use a high quality soldering iron with temperature control, but a high-quality soldering iron is enough for about 25-30 watts.
Solder with a diameter of 1mm with flux. I don’t specifically specify the brand of solder, for those who have a lot of solder on the coil (there are 1 kg coils on the coil), and very few people will know the name of yoga.

As I wrote more, the payment is okіsna, it is easier to solder, I didn’t zastosovuvat any fluxes, I stick only what is in the solder, I just need not to forget sometimes to strew the fluff from jala.

Here I took a photo with the butt of a soldering soldering and no more.
A good soldering is to blame for looking like a small droplet that wraps around the whiskers.
Ale in the photo is a sprat of mist, de solder is clearly not enough. So go on a double-sided plate with metalization (there, soldering closes and closes the middle of the opening), but you can’t work on a one-sided plate, so soldering can “fall apart”.

The visnovki of the transistors also need to be molded forward, it is necessary to work so that the visnovka is not deformed to the base of the case (the elders guess the legendary KT315, they loved to make the visnovka).
Press the components and I form trochs anyway. Molding is carried out in such a way that the component is standing above the board, in such a case it will be less warm to transfer to the board and not collapse.

This is how the molded sweat resistors on the board look like.
All components were soldered only from the bottom, soldering some kind of water on the upper part of the board, penetrating the crack open the capillary effect. Bazhano solder in such a way that the soldering powder penetrating the upper part, to increase the soldering strength, and at the time of important components I improve the stability.

Even before I molded the component parts for additional tweezers, then for diodes I already need small pliers with narrow jaws.
Visnovki are molded approximately like resistors.

Ale when installing vіdminnostі.
As for the components with thin frills, the installation is on the back, then we cut it, then for the diodes everything is navpak. You just don’t bend after biting such a whisker, then we bend the whiskers to that hand, then we bite the lock.

The power vuzol was selected from the zastosuvannyam of two transistors, included behind the Darlington circuit.
One of the transistors is installed on a small heatsink, usually through thermal paste.
The kit has a bunch of chotiri M3 screws, one here here.

A couple of photos may be soldered. I will not describe the installation of terminal blocks and other components, as it is intuitively understood, it can be seen from the photograph.
Before the speech, there are terminal blocks, terminal blocks are installed on the board for connecting the input, output, and fan life.

I haven’t paid the fee yet, wanting to often pay the price at this stage.
We appreciate that in the future there will be a small part of the additional funding.

After the main stage of selection, we have lost such components.
Burnt transistor
Two replacement resistors
Two sockets for mounting on the board
Two roses with wires, before speech, spend more softly, and a small cut.
Three guineas.

On the back of the head, it was necessary to change the resistors on the board itself, but it stinks so badly that the floorings are not installed handily, so I didn’t put them together and showed them just for the butt.
The stench will stand even closer and regulate it will be very unhandy, even though it's real.

And yet, they didn’t forget to give in a set of darts with roses, so richly handy.
With such a look, the resistors can be placed on the front panel of the accessory, and the board can be installed on the handy side.
Prenagidno soldered the tight transistor. This is a superb bipolar transistor, but it may have a maximum intensity, which can be increased, up to 100 watts (naturally when installed on a radiator).
I lost three screws, I don’t understand, where to put them in, if you pay by the hoods, then you need chotiri, if you cringe a tight transistor, then the stench is short, a riddle.

You can live the board in the form of a transformer with a voltage of up to 22 Volts (the characteristics say 24, but I explained why such a voltage cannot be loaded).
I vyrishiv vikoristati for a long time lying in my transformer for podsilyuvacha Romantika. Why for, and not for, the one that is not standing anywhere else :)
This transformer has two output power windings of 21 Volts each, two additional 16 Volt windings and a screen winding.
The voltage is indicated for the input 220, but since we already have a standard of 230 at the same time, then the output voltage will be three times worse.
Rozrahunkov's transformer pressure is close to 100 watts.
I paralleled the windings of the power windings, in order to take more streams. It was possible to make a victorious scheme for rectifying with two diodes, but it wouldn’t be better with it, for that, having filled it with є.

First try to understand. I installed a small heatsink on the transistor, but let such a look have a great heat, shards of a linear PSU.
The adjustment of the struma and the voltage is carried out without problems, everything worked out right away, so I can fully recommend the constructor.
The first photo is voltage stabilization, the other is struma.

For the cob, I have reconsidered what the transformer looks like after the voltage is rectified, the shards indicate the maximum output voltage.
I got close to 25 volts, not a lot. The capacity of the filtering capacitor is 3300 microfarads, I would like to increase it, but I would like to see a whole lot of practicality in such a look.

The best option is to add that vikoristannya yakіsny block of life. However, if there is no possibility to improve the already existing block, then bad results can be taken even with the addition of a cheap (budgetary) block of living.

Chinese designers start to work hard to pay for the criterion of maximum versatility, so that in such a manner, so that depending on the number of installed elements, you can vary the quality and, depending on the price.
Therefore, if you install those details, on which you have saved the picker, and also remember - we will see a block of the middle price category. Obviously, yoga cannot be compared with expensive copies, the topology of other boards, circuitry, and all the details are backed up for high quality.

Everything that you work for your BP - you work on your fear and risk!
If you don’t have sufficient qualifications, then don’t read what is written here and don’t do anything else!
Ale for the average computer is a wholesome option.

Nasampred, you need to check the power supply unit and evaluate the size of the largest transformer, if you have a tag, the numbers 33 should go to the back of the head, or more and more 3x3x3 cm and more - you can mess around. Otherwise, you are unlikely to be able to achieve a satisfactory result.

In photo 1 - a transformer of a normal living block, in photo 2 - a transformer of a Chinese door.

More attention should be paid to the dimensions of the throttle group stabilization. The more expansion of the cores of the transformer and the inductor, the more the stock of strums of supply.
For a transformer, a hit in the circuit can lead to a sharp drop in the KKD and fluctuations in the output from the fret of high-voltage switches, for a choke - a strong voltage surge in the main channels.

Rice. 1 A typical Chinese ATX live block, daily mesh filter.

The most critical details of the PSU are:
. High voltage capacitors
. High voltage transistors
. High-voltage rectifier diodes
.High frequency power transformer.
.Low-voltage rectifier assembly.

Additional care:
1. For the cob, it is necessary to replace the input electrolytic capacitors, minus the capacitors of a larger capacity, the building should be placed on the landing site. Look for cheap units with ratings of 220µF x 200V or for short ones 330µF x 200V. Changeable to 470µF x 200V or shorter to 680µF x 200V. Qi capacitors are injected into the building block trim and short-time loss of the load voltage and tension, which is seen as the Zhivlennya Block.

Rice. 2 Electrical Capacitor Inputs and High Voltage Part of the Live Unit, which includes a Rectifier, Bridge Inverter, 200V (330µF, 85 degrees) electricity.

Further, it is necessary to put all chokes in the low-voltage part of the power supply unit, the choke of the mesh filter (a place for this installation).
Throttles can be wound by yourself on a ferite ring with a diameter of 1-1.5 cm with a medium dart with lacquer insulation with a retina of 1.0-2.0 mm 10-15 turns. You can also take throttles from a faulty PSU. It is also necessary to solder the capacitors, which are to be smoothed, at the empty space of the low-voltage part. The capacity of the capacitors should be chosen to be maximum, but so, if it can be placed on a regular place.
Be sure to put enough capacitors 2200µF on 16V Low ESR series 105 degrees, in +3.3V, +5V, +12V.

In the rectifier modules of the secondary rectifiers, we replace all the diodes with more voltage.
The power supply of the computer in the rest of the hour, the greater world was growing on the + 12V bus (motherboards and processors), so in the first place it is necessary to restore the respect for the entire module.

Typical view of direct diodes:

1. - Diode storage MBR3045PT (30A) - Installed in expensive living blocks;

2. - double folding UG18DCT (18A) - less than one;

3. - diode replacement for folding (5A) - the last option, which is used to change the binding.

Channel +5V Stby- The FR302 pickup diode can be changed to 1N5822. In the same place, we put an insufficient filtering choke, and the first filter capacitor is increased to 1000μF.

Channel +3.3V- Folding S10C45 min at 20C40 (20A/40V), up to apparent capacity 2200uF/10V, additionally 2200uF/16V and insufficient choke. If the channel is + 3.3V for implementation on the field, then we put the transistor lower than 40A / 50V (IRFZ48N).

Channel +5V- S16C45 storage period is changed to 30C40S. Replacement of one electrolyte 1000uF/10V, set 3300uF/10V + 1500uF/16V.

Channel +12V- Double folding F12C20 can be installed on two sides in parallel UG18DCT (18А/200V) or F16C20 (16A/200V). Replacement of one capacitor 1000uF / 16V, set - 2pcs 2200μF / 16V.

Channel -12V- Replace 470μF/16V, set 1000μF/16V.

Also, we put 2 or 3 diode assemblies MOSPEC S30D40 (number after D - voltage - the higher, we are calmer) or F12C20C - 200V and similar characteristics, 3 capacitors 2200 μF x 16 volts, 2 capacitors 4200V. Electricity, put more low impedance from the 105 degree series! - 105*С.

Rice. 3 Low voltage part on the living unit. Vipryamlyachі, elektrolitichnі capacitors and droselі, deyakі vіdsutnі.

As a radiator for the block of life, the viconan at the sight of the plates with the pierced pellets, we open the pellets at the side of the ribs, in order to maximize the efficiency.

Rice. 5 ATX living unit with additional cooling radiators.

As seen in the PSU, the channels +5 volts and +12 volts are stabilized and controlled at the same time. With +5 volts installed, the actual voltage on channel +12 becomes 12.5 volts. If the computer is strongly driven by the +5 channel (AMD-based system), then there is a voltage drop of up to 4.8 volts, with which the voltage of the +12 channel becomes equal to 13 volts. In case of a Pentium-based system, the +12 volt channel is more strongly driven and everything seems to be the same. Due to the fact that the +5 volt channel of the power supply unit is richer than it is, then you can build a cheap unit without any problems to live a system based on AMD. However, the Pentium is more energy efficient (especially for +12 volts) and a cheaper PSU needs to be upgraded.
The voltage of the channel is 12 volts, which is too harsh for hard disks. Basically, the HDD is heated through a voltage increase (more than 12.6 volts). In order to change the voltage of 13 volts, it’s enough to open the yellow rod to live the HDD, solder a hard diode, for example, KD213. As a result, the voltage changes by 0.6 volts and becomes 11.6 - 12.4V, which is completely safe for a hard drive.

As a result, by modernizing the cheap ATX block in such a way, you can eliminate the inconvenience of the power supply unit for your home computer, which is much less gritty.

Today, ready-made modules for pulse voltage stabilizers on the LM2596 microcircuit have become available.

The application is to achieve high parameters, and the variance of the finished module is smaller in terms of the variance of parts that can be included before the new one. Privablyuyut small razmіri pay.
I have tried some pieces and tried them out. I spodіvayus, my dosvіd bude korisnym not necessary to inform the radioamators.

I bought modules on ebay, as in the photo above. Although the site showed solid capacitors for a voltage of 50 V, the auction was true to its name. Capacitors are fixed, and half of the modules are capacitors for a voltage of 16 St.

... it is important to call it a stabilizer ...

You might think that it is enough to take a transformer, a diode place, connect a module to them and in front of us is a stabilizer with a voltage of 3 ... 30 V and a stream up to 2 A (short-hour up to 3 A).
I am so timid. Without pretension, everything was a mess. Transformer with two windings of 18 V each and a common strum up to 1.5 A (the wire was obviously thin, so it showed up).
I need a stabilizer + -18 V, and I set the required voltage.
With input 12 ohm strum 1.5 A, oscillogram, 5 V/clitin vertically.

It is important to call it a stabilizer.
The reason is simple and understandable: the capacitor on the board is 200 microfarads and can only be used for normal DC-DC conversion. When applying voltage to the input of the laboratory unit, everything was normal. The outcome is obvious: it is necessary to keep the Dzherel stabilizer alive with small pulsations in order to add capacity to the bridge after that.

Voltage axis at voltage 1.5 at the input of the module without additional capacitor.

With an additional capacitor of 4700 microfarads at the input, the ripple at the output changed sharply, but for 1.5 A more noticeably. With a change in output voltage up to 16 V, a straight line is ideal (2 V / switch).

Voltage drop on DC-DC modules may be at least 2…2.5 St.

Now you can marvel at the pulsations at the output of the pulse shifter.

One can see small ripples with a frequency of 100 Hz modulated with a frequency of tens of kHz. The datasheet for 2596 recommends an optional LC filter at the exit. So we grow. As a core, I made a cylindrical core from a faulty computer power supply unit and wound the winding in two balls with a 0.8 mm rod.

On the board, with a red color, a place is shown for installing a jumper - a double dart of two channels, an arrow - a place for soldering a hard dart, so as not to vicorate the glue.

Let's wonder what happened to the high-frequency pulsations.

There is no more. Small ripples with a frequency of 100 Hz have been lost.
Not ideal, but not bad.
I respect that with an increase in output voltage, the choke in the module starts to derenchit and at the output there is a sharp increase in the HF transient, the voltage changes a little (all the same with a voltage of 12 ohms), the transient and the noise disappears completely.

To mount the module, I made self-contained “sticks” made of tinned rod with a diameter of 1 mm.

This ensured the manual installation and cooling of the modules. Stіyki can be strongly heated when fried, the stench does not move to water from simple pins. Well, the design is stable, so it is necessary to solder to pay the finest darts - the garna is hard and that contact.
The board allows you to easily replace the DC-DC module.

A bright view of the plate with throttles in the form of halves of a ferite core (inductance is not critical).

Podbag inclusion scheme:

The scheme is simple and obvious.

In case of 1 A strumming force, the details are heated up: diode seat, microcircuit, module choke, the largest choke (additional choke is cold). Heating on dotik 50 degrees.

When working in the laboratory block of life, heating with strums of 1.5 and 2 A is tolerable by stretching dekilkoh khvilin. For trial work with large strums, there is a need for heat transfer to a microcircuit and a large throttle.

Regardless of the small dimensions of the DC-DC module, the higher dimensions of the boards were the same as the analog stabilizer board.

Visnovki:

1. Necessary transformer from a high-current secondary winding or from a reserve for a voltage, at which point the voltage stream can be shifted over the transformer winding stream.

2. With streams of the order of 2 A and more bazhane, there is little heat input to the diode site and microcircuit 2596.

3. A high-capacity life-giving capacitor that pleasantly flows into the stabilizer's work. Navit is great that yakіsna єmnіst trohi heats up, so it's too small ESR.

4. To suppress the pulsations from the frequency of conversion, an LC filter at the exit is necessary.

5. The Danish stabilizer can obviously outperform the most compensatory one, which can work in a wide range of external voltages, at low voltages it can take a larger stream on the output, a lower one can protect the transformer.

6. Modules allow you to build a live block with incorrigible parameters simply and quickly, with a simple water supply of stone for the preparation of circuit boards for impulse attachments, which are good for radioamators-on-the-ears.

Hello everyone. Everyone who is engaged in electronics can have a problem. How to solder the nebazhannya or vie radioamator-pochatkіvets - this article was written especially for you. Let's talk about the characteristics of the power supply unit and its power in the form of popular types of PSU on LM317 or LM338.

Modules for PSU

We choose a pulse block of life, but we won’t be able to solder anything, we just buy from the Chinese already soldering a voltage regulation module with a stream exchange, such a module can supply 30 volts 5 amperes. Wait a minute, it's not a leather analog power supply unit on such a building, that's how you spend the heat, the chips of the transistor and the microcircuit are overhead, taking the voltage on yourself. I don’t write about the specific type of the module, I don’t write a scheme - they stink all over.

Now indication - there is nothing wrong here, take the indication module ready, like with a voltage control module.

What will all live in a 220 V grid - read further. There are two paths here.

1. The first - shukati ready transformer or wind your own.
2. The other one is to take a pulsed PSU for the required voltage and stream, or to add additional required characteristics.

And so, forgetting to say, what can be applied to the control module as much as possible without naslіdkіv 32 volts, or rather 30 volts 5 amperes, with a streamer it is necessary to be careful, so that the control circuit can tolerate 5 amperes, but not more, but everything else the transformer therefore burns easily.

PSU storage

The process of folding itself is more on the right. Let's tell you how I get blues with accessories.

• The block of life impulse output of a laptop is 19 volts 3.5 Amperes.
• Curing module.
• Display module.

Axis and everything, so-so, I didn’t forget to add anything, but singly we need some old building. I have a kind of radian car radio on the right, so it’s better if it’s different, but I also want to praise the case for the DVD drive of the PC.

We choose our future block of living, first attach the payment to the body, it is necessary to insulate them, I gave a lining with a tovstoy plіvka, and then all payments can be attached to double-sided tape.

But if on the right it went to the change resistors to regulate the voltage and exchange the stream, I realized that I don’t have them, well, not those who didn’t get excited - I don’t have the required nominal value, but 10 K itself. two replacements of the bedrooms (so that it wasn’t a bad thing), having pulled out the handles and thinking about soldering them to the replacements, why were they on the board, why were they - I soldered them, and screwed the screw.

Ale, nothing came of it, to center the zmіg only if through heat shrinkage, having rolled up the axis of the thread. Ale won pratsyuvala, less vlashtovuє, and how long ago pratsyuvatime - know.

Behind the bazhannyam, you can make a case, but for me it’s not much better, but better, it’s just metal.

As a result, we have a very compact lightweight laboratory block of life, which can be short-circuited, cooled down, and, arguably, voltage regulation. І all the time to work even more smoothly with the multi-turn resistors, soldering the control fee. The voltage was regulated from 0.8 volts to 20. The current was exchanged from 20 mA to 4 A. Good luck to you, buv Kalyan.Super.Bos

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