how to make a 30v to 12v high power regulated power supply
In this video we will show you how to make a high power 30v to 12v regulated power supply. This power supply will allow you to power your project or device using a standard outlet, making it easy to get started.
If you're looking for a simple way to power your project or device, this high power regulated power supply is the perfect solution. This power supply is easy to make and will help you get your project started quickly. So what are you waiting for, download this tutorial and start building your high power regulated power supply today
how to make a 30v to 12v high power regulated power supply
In this video we will show you how to make a high power 30v to 12v regulated power supply. This power supply will allow you to power your project or device using a standard outlet, making it easy to get started.
If you're looking for a simple way to power your project or device, this high power regulated power supply is the perfect solution. This power supply is easy to make and will help you get your project started quickly. So what are you waiting for, download this tutorial and start building your high power regulated power supply today!
The 12 volt voltage is used to power a large number of electrical devices: receivers and tape recorders, amplifiers, laptops, screwdrivers, LED strips and more. Often they operate from batteries or power supplies, but when either fails, the question arises before the user: "How do I get 12 volts of alternating current? We will discuss this further giving a overview of the most rational methods.
Reduce the voltage without a transformer.
Use a 50 Hz mains transformer.
Use a switching power supply, possibly coupled with a pulse or linear converter.
Undervoltage without transformer
There are 3 ways to convert a voltage of 220 Volt to 12 without a transformer:
Reduce the voltage with a ballast capacitor. A universal method is used to power low-power electronic devices, such as LED lamps, and to charge small batteries, such as in flashlights. The disadvantage is the low cosine of Phi in the circuit and low reliability, but this does not prevent it from being used everywhere in cheap electrical appliances.
Reduce the voltage (current limit) with a resistor. The method is not very good, but it has the right to exist, suitable for powering very weak loads, such as an LED. Its main disadvantage is the release of a large amount of active power in the form of heat on the resistor.
Use an autotransformer or choke with similar winding logic.
quenching capacitor
Before you start considering this diet, you must first indicate the conditions that you must comply with:
The power supply is not universal, therefore it is calculated and used only for working with a known device.
All external elements of the power supply, for example, regulators, if you use additional components for the circuit, must be insulated, and plastic caps are put on the metal handles of the potentiometers. Do not touch the power supply board and the wires to connect the output voltage if the load is not connected to it or if the Zener diode or the stabilizer for low DC voltage is not installed in the circuit.
R1 - necessary for discharging a quench capacitor, C1 - the main element, a quench capacitor, R2 - limits currents when the circuit is turned on, VD1 - a diode bridge, VD2 - a zener diode for voltage desired, for 12 volts suitable: D814D, KS207V, 1N4742A. You can use a linear converter.
The value of the quenching capacitor is calculated by the formula:
C (μF) = 3200 * I (load) / √ (Uinput²-Uoutput²)
Or:
C (μF) = 3200 * I (load) / √ Input
But you can use the calculators, they are online or as a program for the PC, for example, as an option from Goncharuk Vadim, you can search on the Internet.
Capacitors should be like this - film:
The rest of the listed methods do not make sense, because lowering the voltage from 220 to 12 volts with a resistor is not efficient due to the large heat generation (the dimensions and power of the resistor will be appropriate), and it is impractical to wind a choke with a tap of a certain turn due to labor costs and dimensions.
Power supply on a network transformer
A classic and reliable circuit, ideal for powering sound amplifiers such as loudspeakers and tape recorders. Provided that a normal filter capacitor is installed, which will provide the required level of ripple.
Additionally, you can install a 12 volt stabilizer, such as KREN or L7812 or any other for the desired voltage. Without it, the output voltage will change depending on the surges in the network and will be equal to:
It should be noted here that the output voltage after the diode bridge should be 2-3 volts higher than the output voltage of the BP-12V, but not more than 30 V, it is limited by the technical characteristics of the stabilizer , and the efficiency depends on the voltage difference between input and outputie.
I also want to add an adjustable PSU circuit to the LM317. With it, you can get any voltage from 1.1 V to the value of the rectified voltage of the transformer.
12 volts to 24 volts or other high DC voltage
To reduce the DC voltage from 24 volts to 12 volts, you can use a linear or switching stabilizer. Such a need may arise if you need to supply 12 V to the on-board network load of a bus or truck with a voltage of 24 V. In addition, you will receive a stabilized voltage in the car network, which often changes. Even in cars and motorcycles with a 12 V on-board network, it reaches 14.7 V with the engine running. Therefore, this circuit can also be used to power LED strips and LEDs on vehicles.
You can connect a load up to 1-1.5 A to it. To amplify the current, you can use a through-hole transistor, but the output voltage may decrease slightly - by 0.5 V.
Also you can use LDO stabilizers, they are the same linear voltage stabilizers, but with low voltage drop, like the AMS-1117-12v
The linear stabilizer circuit was mentioned in the previous paragraph.
Wiring diagrams are similar to L7812 and Banks. In addition, these options are suitable for lowering the voltage of the laptop power supply.
It is more efficient to use pulsed buck voltage converters, for example, based on the LM2596 IC. The pads are signed on the map In (+ input) and Out (- output), respectively. On sale you can find a version with a fixed and adjustable output voltage, as in the photo at the top right you see a multi-turn potentiometer in blue
12 volts over 5 volts or other undervoltage
You can get 12 V from 5 V, for example, from a USB port or a mobile phone charger, you can also use it with the now popular lithium batteries with a voltage of 3.7 to 4 .2V.
If we talk about power supplies, you can intervene in the internal circuit, edit the source of the reference voltage, but for this you need to have some knowledge of electronics. But you can make it easier and get 12V with a boost converter, for example, based on the XL6009 IC. On sale there are options with a fixed output of 12V or adjustable with adjustment in the range from 3.2 to 30V. The output current is 3A.
It is sold on a finished board, and there are notes with pin assignments - input and output. Another option is to use MT3608 LM2977, boost to 24V and can support output current up to 2A. Also pictured are clearly visible signatures on the contact pads.
Or use a ready made 12V battery marked 23AE or 27A, these are used in remote controls. Inside is a selection of little 'pills' that you see in the photo.
We considered a set of options for getting 12 V at home. Each of them has its advantages and disadvantages, a varying degree of efficiency, reliability and efficiency. Which option is better to use, you should choose yourself based on capabilities and needs.
It's also worth noting that we haven't considered any of the options. You can get 12 volts from the power supply of an ATX computer. To run it without a PC, you need to short the green wire to one of the black wires. 12 volts is on the yellow wire. Typically, the power of a 12V line is several hundred watts and a current of tens of amperes.
Now you know how to get 12 volts from 220 or other available values. Finally, we recommend that you watch a useful video on the subject:
how to make a 30v to 12v high power regulated power supply
In this video we will show you how to make a high power 30v to 12v regulated power supply. This power supply will allow you to power your project or device using a standard outlet, making it easy to get started.
If you're looking for a simple way to power your project or device, this high power regulated power supply is the perfect solution. This power supply is easy to make and will help you get your project started quickly. So what are you waiting for, download this tutorial and start building your high power regulated power supply today
how to make a 30v to 12v high power regulated power supply
In this video we will show you how to make a high power 30v to 12v regulated power supply. This power supply will allow you to power your project or device using a standard outlet, making it easy to get started.
If you're looking for a simple way to power your project or device, this high power regulated power supply is the perfect solution. This power supply is easy to make and will help you get your project started quickly. So what are you waiting for, download this tutorial and start building your high power regulated power supply today!
The 12 volt voltage is used to power a large number of electrical devices: receivers and tape recorders, amplifiers, laptops, screwdrivers, LED strips and more. Often they operate from batteries or power supplies, but when either fails, the question arises before the user: "How do I get 12 volts of alternating current? We will discuss this further giving a overview of the most rational methods.
Reduce the voltage without a transformer.
Use a 50 Hz mains transformer.
Use a switching power supply, possibly coupled with a pulse or linear converter.
Undervoltage without transformer
There are 3 ways to convert a voltage of 220 Volt to 12 without a transformer:
Reduce the voltage with a ballast capacitor. A universal method is used to power low-power electronic devices, such as LED lamps, and to charge small batteries, such as in flashlights. The disadvantage is the low cosine of Phi in the circuit and low reliability, but this does not prevent it from being used everywhere in cheap electrical appliances.
Reduce the voltage (current limit) with a resistor. The method is not very good, but it has the right to exist, suitable for powering very weak loads, such as an LED. Its main disadvantage is the release of a large amount of active power in the form of heat on the resistor.
Use an autotransformer or choke with similar winding logic.
quenching capacitor
Before you start considering this diet, you must first indicate the conditions that you must comply with:
The power supply is not universal, therefore it is calculated and used only for working with a known device.
All external elements of the power supply, for example, regulators, if you use additional components for the circuit, must be insulated, and plastic caps are put on the metal handles of the potentiometers. Do not touch the power supply board and the wires to connect the output voltage if the load is not connected to it or if the Zener diode or the stabilizer for low DC voltage is not installed in the circuit.
R1 - necessary for discharging a quench capacitor, C1 - the main element, a quench capacitor, R2 - limits currents when the circuit is turned on, VD1 - a diode bridge, VD2 - a zener diode for voltage desired, for 12 volts suitable: D814D, KS207V, 1N4742A. You can use a linear converter.
The value of the quenching capacitor is calculated by the formula:
C (μF) = 3200 * I (load) / √ (Uinput²-Uoutput²)
Or:
C (μF) = 3200 * I (load) / √ Input
But you can use the calculators, they are online or as a program for the PC, for example, as an option from Goncharuk Vadim, you can search on the Internet.
Capacitors should be like this - film:
The rest of the listed methods do not make sense, because lowering the voltage from 220 to 12 volts with a resistor is not efficient due to the large heat generation (the dimensions and power of the resistor will be appropriate), and it is impractical to wind a choke with a tap of a certain turn due to labor costs and dimensions.
Power supply on a network transformer
A classic and reliable circuit, ideal for powering sound amplifiers such as loudspeakers and tape recorders. Provided that a normal filter capacitor is installed, which will provide the required level of ripple.
Additionally, you can install a 12 volt stabilizer, such as KREN or L7812 or any other for the desired voltage. Without it, the output voltage will change depending on the surges in the network and will be equal to:
It should be noted here that the output voltage after the diode bridge should be 2-3 volts higher than the output voltage of the BP-12V, but not more than 30 V, it is limited by the technical characteristics of the stabilizer , and the efficiency depends on the voltage difference between input and outputie.
I also want to add an adjustable PSU circuit to the LM317. With it, you can get any voltage from 1.1 V to the value of the rectified voltage of the transformer.
12 volts to 24 volts or other high DC voltage
To reduce the DC voltage from 24 volts to 12 volts, you can use a linear or switching stabilizer. Such a need may arise if you need to supply 12 V to the on-board network load of a bus or truck with a voltage of 24 V. In addition, you will receive a stabilized voltage in the car network, which often changes. Even in cars and motorcycles with a 12 V on-board network, it reaches 14.7 V with the engine running. Therefore, this circuit can also be used to power LED strips and LEDs on vehicles.
You can connect a load up to 1-1.5 A to it. To amplify the current, you can use a through-hole transistor, but the output voltage may decrease slightly - by 0.5 V.
Also you can use LDO stabilizers, they are the same linear voltage stabilizers, but with low voltage drop, like the AMS-1117-12v
The linear stabilizer circuit was mentioned in the previous paragraph.
Wiring diagrams are similar to L7812 and Banks. In addition, these options are suitable for lowering the voltage of the laptop power supply.
It is more efficient to use pulsed buck voltage converters, for example, based on the LM2596 IC. The pads are signed on the map In (+ input) and Out (- output), respectively. On sale you can find a version with a fixed and adjustable output voltage, as in the photo at the top right you see a multi-turn potentiometer in blue
12 volts over 5 volts or other undervoltage
You can get 12 V from 5 V, for example, from a USB port or a mobile phone charger, you can also use it with the now popular lithium batteries with a voltage of 3.7 to 4 .2V.
If we talk about power supplies, you can intervene in the internal circuit, edit the source of the reference voltage, but for this you need to have some knowledge of electronics. But you can make it easier and get 12V with a boost converter, for example, based on the XL6009 IC. On sale there are options with a fixed output of 12V or adjustable with adjustment in the range from 3.2 to 30V. The output current is 3A.
It is sold on a finished board, and there are notes with pin assignments - input and output. Another option is to use MT3608 LM2977, boost to 24V and can support output current up to 2A. Also pictured are clearly visible signatures on the contact pads.
Or use a ready made 12V battery marked 23AE or 27A, these are used in remote controls. Inside is a selection of little 'pills' that you see in the photo.
We considered a set of options for getting 12 V at home. Each of them has its advantages and disadvantages, a varying degree of efficiency, reliability and efficiency. Which option is better to use, you should choose yourself based on capabilities and needs.
It's also worth noting that we haven't considered any of the options. You can get 12 volts from the power supply of an ATX computer. To run it without a PC, you need to short the green wire to one of the black wires. 12 volts is on the yellow wire. Typically, the power of a 12V line is several hundred watts and a current of tens of amperes.
Now you know how to get 12 volts from 220 or other available values. Finally, we recommend that you watch a useful video on the subject:
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