Baseline data: Motor gearbox working voltage in which 5 volts at a current of 1 A and the ESP-8266 microcontroller with a change in a change in the 3,3 volt-sensitive supply voltage and with peak current up to 600 milliam. All this must be taken into account and squeeze from one rechargeable lithium-ion battery with a voltage of 2.8 -4.2 volts.

We collect the scheme below: Battery Lithium-ion 18650 voltage 2K, 8 -4.2 volt without internal charger circuit -\u003e Connect the module on the TP4056 chip intended for charging lithium-ion batteries with a battery discharge limit function to 2.8 volts and protection from short circuit (do not forget that this module starts with the battery enabled and the short-term power supply of 5 volts to the input of the module from the USB charger, this allows not to use the power switch, the discharge current in waiting mode is not very large and with a debt not use of the entire device Turn off itself when the voltage drops on the battery below 2.8 volts)

To the TP4056 module, you connect the module on the MT3608 microcircuit - an increase in DC-DC (permanent current) stabilizer and a voltage converter from 2.8 -4.2 volts of the battery to a stable 5 volt 2 amp - power of a motor gearbox.

In parallel with the module output of the MT3608, we connect a downgrade DC-DC stabilizer-converter on the MP1584 EN chip intended for a stable power supply of 3.3 volts 1 amper of the ESP8266 microprocessor.

Stable ESP8266 work depends on the stability stability. Before connecting the DC-DC conversion modules, do not forget to configure the desired voltage to be adjusted by variable resistances, put the capacitor in parallel to the motor gearbox terminals so that it does not create high-frequency interference by the ESP8266 microprocessor.

As you can see from the readings of the multimeter when the motor gearbox is connected, the power supply voltage of the microcontroller ESP8266 has not changed!

Why do you need a voltage stabilizer. How to use voltage stabilizers

Acquaintance with Stabilians, the calculation of the parametric stabilizer; the use of integrated stabilizers; The design of the simple tester of Stabilians and another.

AMS1117 technical passport

Name	AMS1117.	KEXIN industrial
Description	Linear voltage regulator DC-DC with small internal voltage drop, output 800mA, 3.3V, SOT-223 With controlled or fixed regulation mode
AMS1117 PDF technical passport (Datasheet) :
Characteristics: - maximum stabilization with a total current load; - Fast transitional characteristics; - protection for exit when the load current is exceeded; - built-in thermal protection; - Low noise - adjustable or fixed voltage 1.5 volts, 1.8 volts, 2.5 volts, 1.9 volts, 3.3 volts, 5 volts.

RT9013 Technical passport

Name		Richtek technology
Description	Stabilizer-converter to a load with a current of 500mA consumption, with a small voltage drop, low levels of own noise, ultrafast, with a current output protection and short circuit, CMOS LDO.
RT9013 PDF Technical Passport (Datasheet) :
general description RT9013 is a high-performance, 500mA LDO voltage control, with high PSRR and ultra-low voltage drop. Ideal for portable and wireless devices with high performance requirements and space of accommodation. Wide range of input operating voltage: 2.2 volts - 5.5 volts with Small voltage drop: 250 mV with a load of 500 mA. Low level of own noise for use. Superfast reaction to transient processes in the load. Thermal shutdown and current protection. A condenser 1 of the ICF is required at the output.

Name		Monolithic Power Systems.
Description	3A, 1.5MHz, 28V Step-Down Converter
(Datasheet) :
Image info: mp1584 MP1584 is a high-frequency 1.5 MHz lowering stabilizer-converter DC-DC (permanent permanent) voltage with integrated output MOS transistor. It provides 3a output current with current stability control, rapid response and easy voltage compensation. The input voltage range from 4.5 volts to 28 volts covers most of the lower applications, including in the automotive sphere. 100 MCA Operative rest current allows you to use a module in sleep mode from battery power. The conversion efficiency in a wide load range is achieved by reducing the switching frequency at low load to reduce losses when switching the shutter of the output transistor.

** You can buy in the store Your Cee

Name		Monolithic Power Systems.
Description	3A, from 4.75 volts up to 23 volts, 340KHz, lowering converter
MP2307 PDF specification (Datasheet) :
Image info: mp2307 The MP2307 is a monolithic synchronous lowering DC-DC converter stabilizer (permanent). The device combines 100 million MOS transistors, which provide 3A DC loads in a wide working input voltage from 4.75 volts to 23 volts. Adjustable smooth start prevents current drops when / disabled, the power current is below 1 MCA. This device available in the SOIC case with 8 conclusions provides a very compact system solution with minimal dependence on external components. 1. The heat-resistant 8-pin SOIC case. 2. 3A - continuous output current 4A - peak output current. 3. A wide range of working input voltage from 4.75 volts to 23 volts.

* You can buy in the store Your Cee

LM2596 Technical passport

Name		First of the first components of the international
Description	Simple lowering stabilizer-3A power converter with an internal frequency of 150 kHz
LM2596 PDF technical passport (Datasheet) :
GENERAL DESCRIPTION The Voltage Regulators LM2596 series is monolithic integral chips that provide all active functions of a lower pulse power Converter Stabilizer capable of loading up to 3a with excellent linear voltage adjustment on the load. These devices are available with fixed 3.3 volt stabilized voltages, 5 volt, 12 volts, and with adjustable output stabilized voltage from 1.2 Volt to 37 volts. Thermal shutdown and current protection. Increased microcircuit diagram: Typical connection:

MC34063A Technical passport

Name	MC34063A.	Wing Sching International Group
Description	DC-DC Controlled Converter
MC34063A PDF technical passport (Datasheet) :

Weather stations on.

Thinking, I came to the conclusion that the most expensive and voluminous part of the meteorological station is the Arduino Uno fee. The cheapest replacement option can be the Arduino Pro mini board. Arduino Pro mini is made in four options. To solve my problem, an option with a MEGA328P microcontroller and a 5 volt supply voltage is suitable. But there is another option for a voltage of 3.3 volts. What do these options differ? Let's figure it out. The fact is that an economical voltage stabilizer is installed on Arduino Pro Mini fees. For example, such as MIC5205 C output voltage of 5 volts. These 5 volts are fed to the VCC output of the Arduino Pro mini board, therefore the fee will be called "Arduino Pro mini with 5 volt supply voltage". And if instead of the microcircuit of the Mic5205, another 2.3 volt output chip will be delivered, the fee will be called "Arduino Pro MINI card with a supply voltage of 3.3 volt"

Arduino Pro mini can receive energy from an external unstable power supply with voltage up to 12 volts. This power must be fed to the output of the Arduino Pro Mini RAW. But, having familiarized with the datashet (technical document) on the Mic5205 chip, I saw that the power range supplied to the Arduino Pro mini fee can be wider. If, of course, the MIC5205 microcircuit is on the board.

Datasheet on the microcham MIC5205:

The input voltage supplied to the Mic5205 chip can be from 2.5 volts to 16 volts. At the same time, at the output of the standard inclusion circuit, there should be a voltage of about 5 volts without declared accuracy of 1%. If you take advantage of datasheet information: Vin \u003d Vout + 1v to 16V (V) \u003d V) + 1V to 16V) and accepting V) for 5 volts, we get the fact that the ARDUINO Pro MINI service supply voltage supplied to the RAW output may be from 6 Volt to 16 volts with accuracy of 1%.

Datasheet on the microsochem MIC5205:
To power the GY-BMP280-3.3 boards to measure barometric pressure and temperature, I want to apply the module with the AMS1117-3.3 microcircuit. The AMS1117 microcircuit is a linear voltage stabilizer with a small voltage drop.
Photo Module with microcham AMS1117-3.3:

Datasheets on the AMS111 7 microcircuit:
Module diagram with microcham AMS1117-3.3:

I pointed out a module diagram with a microcham AMS1117-3.3 input voltage from 6.5 volts up to 12 volts, based this by the documentation on the AMS111 7 microcircuit.

The seller indicates the input voltage from 4.5 volts to 7 volts. The most interesting thing is that another seller on Aliexpress.com Indicates another voltage range - from 4.2 volts to 10 volts.

What is the matter? I think that manufacturers are soldered into input chains capacitors with the maximum allowable voltage less than the parameters of the chip - 7 volts allow 10 volts. And, maybe even put defective chips with a limited supply voltage range. What happens if the fee purchased to me with the AMS1117-3.3 microcircuit, give a voltage of 12 volts, I do not know.
It is possible to increase the reliability of the Chinese fee with the AMS1117-3.3 microcircuit, ceramic capacitors for electrolytic tantalum capacitors will be switched. This inclusion scheme recommends the AMS1117A Microcircuit Manufacturer of the UE factory Transistor.

The basis of the voltage stabilizer (see Fig. 1) is the microcircuit K157xP2. The beautiful and not fair forgotten stabilizer, with an additional transistor, such as KT972a, can work with a current to 4a.

In this scheme, the output voltage of the stabilizer is 3V. The stabilizer is designed to supply low-voltage radio equipment. In general, with the ratings indicated on the diagram, the output voltage can be set from 1.3 to 6V. At high load currents, the transistor must be installed on the appropriate radiator. The input voltage supplied to the stabilizer must be at least seven volts, although practically it can be up to forty. Such a stabilizer works well from the car battery. The main thing is that the distinguished power on the transistor does not exceed the maximum allowable 8W. SB1 switch You can switch output voltage. For high load currents, it is very convenient - the use of low-power togglers is possible.

How to assemble a simple power supply and a powerful voltage source.
Sometimes you have to connect various electronic devices, including homemade, to a 12 volt constant voltage source. The power supply is easy to assemble yourself within half of the output day. Therefore, there is no need to purchase a finished block when it is more interesting to independently make the necessary thing for your laboratory.


Anyone who wants to make a 12-volt block independently, without any particular difficulty.
Someone needs a source for powering the amplifier, and to whom to power the small TV or radio ...
Step 1: What parts are needed to build the power supply ...
To build a block, prepare electronic components in advance, parts and accessories from which the block itself will be collected ....
-Circuit board.
- Diode 1N4001 diode, or similar. Bridge diode.
Voltage outbill LM7812.
-Maple-vegetable lowering transformer by 220 V, the secondary winding must have 14B - 35V of alternating voltage, with a load current from 100 mA to 1A, depending on which power it is necessary to obtain at the output.
-Electrolitic capacitor with a capacity of 1000mkf - 4700MKF.
CONDACTER Capacity 1UF.
- The condenser with a capacity of 100NF.
- Cutting the mounting wire.
-Diator, if necessary.
If you need to get the maximum power from the power source, it is necessary to prepare the appropriate transformer, diodes and a radiator for the microcircuit.
Step 2: Tools ....
For the manufacture of the unit requires installation tools:
-Passer or soldering station
- Support
-Mothy tweezers
-Works for stripping wires
-Force for solder suction.
-Screwdriver.
And other tools that may be useful.
Step 3: Scheme and others ...


To obtain 5 volt stabilized nutrition, you can replace the LM7812 stabilizer on LM7805.
To increase the load capacity of more than 0.5 amps, you will need a radiator for the chip, otherwise it will fail from overheating.
However, if you need to get several hundred milliampers (less than 500 mA) from the source, then you can do without a radiator, the heating will be insignificant.
In addition, the LED is added to the diagram to visually make sure that the power supply is working, but you can do without it.

12V 30A Power Block Scheme.
When using one stabilizer 7812 as a voltage regulator and several powerful transistors, this power supply is capable of providing an output current of load up to 30 amps.
Perhaps the most expensive detail of this scheme is the power reduced transformer. The secondary winding voltage of the transformer must be somewhat longer than the stabilized voltage of 12V to ensure the operation of the chip. It should be borne in mind that it is not necessary to strive for a greater difference between the input and output voltage value, since with such a current, the heat sink radiator output transistors is significantly increased in size.
In the transformer diagram, the diodes used must be designed for a large maximum direct current, approximately 100a. Through a chip 7812, the flowing maximum current in the circuit will not be more than 1A.
The six composite transistors of Darlington type TIP2955 included in parallel, provide loaded current 30a (each transistor is designed for current 5a), such a high current requires the corresponding radiator size, each transistor passes through itself one sixth part of the load current.
To cool the radiator, you can apply a small fan.
Power supply check
When you first turn on it is not recommended to connect the load. Check the performance of the scheme: connect the voltmeter to the output terminals and measure the voltage value, it should be 12 volts, or the value is very close to it. Next, connect the load resistor 100 ohms, the dispersion capacity is 3 W, or a similar load - the type of incandescent lamp from the car. In this case, the voltmeter reading should not be changed. If there is no 12 volt voltage at the output, turn off the power and check the installation and correctness of the items.
Before installing, check the condition of power transistors, since when the transistor is broken, the voltage from the rectifier is straightened to the output of the circuit. To avoid this, check for a short circuit of power transistors, for this measure the multimeter by separately the resistance between the collector and the emitter of transistors. This check must be carried out before installing them in the scheme.

Power supply 3 - 24V

The power supply circuit provides an adjustable voltage in the range from 3 to 25 volts, at a maximum load current to 2a, if we reduce the current-limiting resistor 0.3 Ohm, the current can be increased to 3 amps and more.
Transistors 2N3055 and 2N3053 are installed on the corresponding radiators, the power of the restrictive resistor must be at least 3 W. Voltage adjustment is monitored by LM1558 or 1458. When using OU 1458, it is necessary to replace the elements of the stabilizer supplying the voltage from the output 8 to 3 OU from the divider on the resistors with a nominal 5.1 K.
Maximum constant voltage for power supply of OU 1458 and 1558 36 V and 44 in respectively. The power transformer must produce a voltage at least 4 volts larger than the stabilized output voltage. The power transformer in the diagram has an output voltage 25.2 volts of alternating current with a removal in the middle. When switching windings, the output voltage decreases to 15 volts.

Power supply diagram by 1.5 V

Power supply diagram for obtaining a voltage of 1.5 volts, a downstream transformer is used, a bridge rectifier with a smoothing filter and LM317 chip.

The diagram of the adjustable power supply unit from 1.5 to 12.5 V

Power supply circuit with an output voltage adjustment to obtain a voltage of 1.5 volts to 12.5 volts, the LM317 chip is used as a regulatory element. It must be installed on the radiator, on an insulating gasket to exclude the closure on the body.

Power supply unit with fixed output voltage

Power supply diagram with fixed output voltage 5 volt or 12 volts. As an active element, the LM 7805 chip, LM7812, is used to be installed on the radiator for cooling the heating of the housing. Selecting a transformer is shown on the left on the plate. By analogy, you can perform a power supply and other output voltages.

Power supply circuit 20 watts with protection

The scheme is intended for a small self-made manufacturer transceiver, author DL6GL. When developing a block, a task was put to have an efficiency of at least 50%, the supply voltage rated 13.8V, a maximum of 15V, on the load current 2,7A.
What is the scheme: Pulse power supply or linear?
Pulse power supplies It turns out a small and efficiency, but it is not known how to behave in a critical situation, throws output voltage ...
Despite the disadvantages, a linear regulation scheme is chosen: a sufficiently bulky transformer, not a high efficiency, it is necessary cooling, etc.
Details from the homemade power supply unit of the 1980s are applied: a radiator with two 2N3055. Not enough only μA723 / LM723 voltage regulator and several small parts.
Voltage voltage regulator is assembled on the μA723 / LM723 chip in the standard inclusion. Output transistors T2, T3 type 2N3055 for cooling are installed on radiators. Using the R1 potentiometer, an output voltage is installed within 12-15V. With the help of a variable resistor R2, the maximum drop of the voltage on the R7 resistor is set, which is 0.7V (between contacts 2 and 3 chip).
For the power supply unit, a toroidal transformer is used (there may be any at your discretion).
On the MC3423 chip, the scheme is collected when voltage (emissions) at the output of the power supply, adjusting R3 is set to the voltage voltage threshold 2 from the R3 / R8 / R9 divider (2.6V reference voltage), the voltage of the BT145 opens the BT145 discovery Causes short circuit leading to the triggering of the fuse 6,3A.

To prepare the power supply to operation (the fuse 6,3A is not yet involved) to set output voltage, for example, 12.0V. Load the load unit, for this you can connect the halogen lamp 12V / 20W. R2 Adjust that the drop in the voltage was 0.7V (current must be in the range of 3,87 0.7 \u003d 0.185ωх3.8).
Customize the response of overvoltage protection, for this we smoothly set the output voltage of 16V and adjust R3 to trigger protection. Next, set the output voltage to normal and install the fuse (before that put the jumper).
The described power supply can be reconstructed for more powerful loads, to do this, install a more powerful transformer, optional transistors, strapping elements, rectifier at its discretion.

Homemade power supply at 3.3V

If a powerful power supply unit is required, by 3.3 volts, then it can be made by converting the old power supply from the PC or using the above schemes. For example, in the power supply circuit by 1.5 V, replace the resistor 47 Ohm more nominal, or put the potentiometer for convenience, adjusting to the desired voltage.

Transformer power supply on KT808

Many radio amateurs remained old Soviet radio components, which are found without affairs, but that can be successfully applied and they faithfully will serve for a long time, one of the well-known UA1Zh schemes, which walks through the Internet. A lot of copies and arrows are broken on the forums when discussing that a better field transistor or ordinary silicon or Germany, which temperature of the crystal heating will they withstand and which of them are more reliable?
Each side has its own arguments, well, you can get parts and make another simple and reliable power supply. The scheme is very simple, protected from current overload and with parallel inclusion of three Kt808 can give a current 20a, the author used such a block with 7 parallel transistors and gave up a load 50a, while the capacitor of the filter capacitor was 120,000 μF, the secondary winding voltage of 19V. It must be borne in mind that the contacts of the relay must switch such a high current.

Subject to proper installation, the output voltage drawdown does not exceed 0.1 volts

Power supply for 1000V, 2000V, 3000V

If we need to have a constant voltage source for high voltage to power the transmitter output cascade lamp, what to apply for this? On the Internet there are many different power supplies for 600V, 1000V, 2000V, 3000V.
The first: on high voltage is used by diagrams with transformers both per phase and three phases (if there is a three-phase voltage source in the house).
The second: to reduce dimensions and weights, use a tranquilantiform power scheme, directly network 220 volts with multiplication of voltage. The biggest disadvantage of this scheme is there is no galvanic interchange between the network and the load, as the output is connected to this voltage source by observing the phase and zero.

The scheme has an increase in the anode transformer T1 (for the desired power, for example 2500 VA, 2400V, current 0.8 A) and the downgrade transformer T2 - TN-46, TN-36, etc. To exclude current shots when turning on and protecting Diodes during the charge of capacitors, the inclusion of the resulting resistors R21 and R22 is applied.
Diodes in high-voltage chains are underlined by resistors for the purpose of uniform distribution of UEBS. Calculation of the nominal formula R (OM) \u003d Pivx500. C1-C20 to eliminate white noise and reduce impulse overvoltage. KBU-810 bridges can be used as diodes by connecting them by the specified scheme and, accordingly, taking the right amount without forgetting about the shunting.
R23-R26 for the discharge of capacitors after disconnecting the network. To equalize the voltage on sequentially connected capacitors, leveling resistors are put in parallel, which are calculated from the ratio for every 1 volt accounts for 100 ohms, but at high voltage resistors are sufficiently high power and here you have to be taught, considering that idle voltage is greater than 1, 41.

Even on the topic

The transformer power supply is 13.8 volts 25 A for the KV transceiver with their own hands.

Repair and revision of the Chinese power supply unit for power adapter.

How to get 3.3 volts out of 5 volts? Need the easiest way. How to make 5 volts 3 volts

How from 5 volts get 3. 3 volts? Need the messenger easy way

There is a microcircuit that feeds from 3. 3 volts. It must be connected to a USB connector where 5 volts voltage. How to do it?, Look for some kind of converter or just evaporate a resistor? 3 years ago from Evgeny Purtov

3 Answers

The microcircuit consumes a stable current. Easier consistent with the power wire to install the selected resistor (do not forget the blocking electrolytic condenser 100. 0 ICF to the Earth). Pick up like this: first put the resistor of obviously important. Start with 5 com. Tester measure the voltage on the IC and, reducing the resistor, bring it closer to the nominal value of the supply voltage -3. 3 volts. This is a regular amateur radio method when not required for special power stabilization. I always worked for me. 3 years ago from Andrey Fedaevskiy Do you want songs? We have them! Melkoshem-stabilizer calls 7833! We have a mass of the scholars, on the left you solder the plus wire from the USB, and on the right you swell this secret device. And the unparthalter is one - well, can the sensible Ilehtroprash, whom you mnich, not know about the chip-stabilizers of the tension of the Gothic Orthodox series 78x. So it goes! 3 years ago From Asdasdasdas Dasdasdasd, the most simple and correct method is a chip-stabilizer to a fixed voltage 3. 3 V. If there is no such chip, then you make a diagram from datashet on LM317 - and everywhere in bulk. Calculate 2 resistors by the formula from the datasheet, so that it is at the exit 3. 3 volts. Or just an alternating resistor exhibit 3. 3 volts. You can make a stabilizer on a resistor and Stabilion, as you wrote above, but for anyone it is necessary to put an emitter repeater after it. . Do not see the impulse converters, I do not see the difference between the entrance and the output is small. 3 years ago from bright paints

Related Questions

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engangs.ru.

How to get 3.3 volts out of 5 volts? Need the easiest way - Domino22

How to get 3.3 volts out of 5 volts? Need the easiest way

1. 2.3B chip-stabilizer chip or 5V inverter chip on 3.3V himself
2. Lord, but turn on it directly, what 3.3 V, you see the most allowed, and those, you can raise 20% in the NCU
3. You can put a stabilizer by 3.3 V. They are full of all sorts, choose the appropriate.
4. 1) No resistance if you feed the microcircuit resistance is set, if you reduce the signal level! 2) Bird LM1117-3.3 cheap, affordable and cheap. Only on the entrance and the yield it is desirable to put electo-olitical capacitors - it will be so stable.
5. Put a stabilion by 3.3 volts.
6. If you specify that the microcircuit would receive a good advice. Why do these questions all are classified?
7. The microcircuit consumes a more or less stable current. Easier consistent with the power wire to install a selected resistor (do not forget the blocking electrolytic capacitor 100.0 μF to the ground). Do you want: first put the resistor of obviously much value. Start with 5 com. Tester measure the voltage on the IC and, reducing the resistor, bring it closer to the nominal value of the supply voltage -3.3 volt. This is a regular amateur radio method when not required for special power stabilization. I always worked for me.
8. Looking for an LDO Stabilizer is a stabilizer that allows you to feed the voltage slightly higher than at the input. I will explain why 7833 is not suitable: the 78xx series has a minimum drop between the entrance and the output of about 2.5 volts, so it will not be possible to get 3.3 out of 5. In LDO, the input voltage may differ from the input to 0.2 ... 0.5 volts, examples: AMS1117-3.3, NCP551-3.3 and the like. Microshem is also a delight and simplicity of a circuitry solution.
9. Do you want songs? We have them! Melkoshem-stabilizer calls 7833! We have a mass of the scholars, on the left you solder the plus wire from the USB, and on the right you swell this secret device. And the unparthalter is one - well, can not the sensible Ilehtroprian, whom you mnich, not know about the chip-stabilizers of the tension of the Gothic Orthodox series 78xx. So it goes!
10. Resistor 300Ω + Stabilodron 3.3V
11. The easiest and most correct way is the chip-stabilizer to a fixed voltage 3.3 V ... if there is no such chip, then you make a diagram from datasheet on LM317 - and everywhere in bulk. Calculate 2 resistors by the formula from the datasheet, so that it was at the exit of 3.3 volts. Or just an alternating resistor exhibit 3.3 volts. You can make a stabilizer on a resistor and Stabilion, as you wrote above, but for anyone it is necessary to put an emitter repeater after it. . Doing the pulse transducers do not mean, because the difference between the entrance and the output is small ..

ATTENTION, only today!

www.domino22.ru.

How out of 5 volts make 3 -

Today we will discern how from 5 volts to do 3 on the example of the device to remove katoshkov. This manual can be used for any 3 volt power supply device. The device for removing the rollers http://ali.pub/1Be8Qi downward converter http://ali.pub/1Be9F0



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