Power supply 12 volts from an energy-saving lamp. How to make a power supply from energy-saving lamps
One of the easiest ways to make a pulsed power supply with your own hands from "improvised means" is to remake an energy-saving lamp for such a power supply. Since the main reason for the failure of compact fluorescent lamps is the burnout of one of the filament filaments, almost all of them can be converted to a switching power supply with the desired voltage. In this particular case, I remade the electronic ballast circuit of a 15-watt light bulb into a 12 volt 1 ampere switching power supply. This alteration does not require tremendous effort and a large number of parts, because the estimated load power is less than the power of the most energy-saving light bulb.
Each lamp manufacturer has its own sets of parts with specific values \u200b\u200bin the circuits of manufactured electronic ballasts, but all circuits are typical. Therefore, in my diagram I did not give the entire lamp circuit, but indicated only its typical beginning and the binding of the lamp bulb. The electronic ballast circuit is drawn in black and red. Red - highlighted bulb and capacitor connected to two filaments. They should be deleted. The green color on the diagram indicates the elements that need to be added. Capacitor C1 - should be replaced with a larger capacity, for example, 10-20u 400v.
A fuse and an input filter are added on the left side of the circuit. L2 is made on the ring from motherboard, has two windings of 15 turns each with a wire from a twisted pair Ø - 0.5 mm. The ring has an outer diameter of 16mm, an inner diameter of 8.5mm, a width of 6.3mm. The inductor L3 has 10 turns Ø - 1 mm, made on a ring from a transformer of another energy-saving lamp. You should choose a lamp with a large emptiness of the window of the inductor Tr1, since it will need to be converted into a transformer. I managed to wind 26 turns of Ø - 0.5 mm on each of the half of the secondary winding. This type of winding requires perfectly symmetrical halves of the winding. To achieve this, I recommend winding secondary winding in two wires at once, each of which will serve as a symmetrical half of each other. I left transistors without radiators, because the estimated circuit consumption is less than the power consumed by the lamp. As a test, it was connected to the maximum glow for 2 hours 5 meters RGB LED strip, consumption of 12v 1A.
Fluorescent lamps, or in other words housekeepers, have long been successfully used in many homes. Therefore, it is not a problem to find an old, even inoperative, economy lamp in the storerooms.
In order to better understand the essence of the alteration, I will say a few words about the gas discharge lamp itself, the principle of its operation. Any discharge lamp, as well as a regular housekeeper, requires high voltage, several times higher than the mains voltage.
Such a lamp has a built-in pulse converter, ballast. Usually, a half-bridge self-oscillating converter is used for this. The circuit of such a power supply is simple, it doesn’t even have extra protectionexcept fuse. But meanwhile, such a system works reliably. As for the launch target, it is built on the basis of a symmetrical diac.
The scheme is similar to the principles electronic transformerOne difference is that a storage choke is used rather than a step-down transformer. So, I want to explain in an accessible way how to get a full-fledged down-type switching power supply from the power supply of an economy lamp - this is, firstly. Secondly, to tell how galvanic isolation from the network is ensured for safe use.
The main thing that needs to be done is to refine the output using a diode rectifier and a smoothing capacitance.
1. We take a housekeeper of any power, I took a working lamp for 125 watts. He opened the lamp, removed the power supply. The flask will not be needed, so it must be disposed of.
2. Next, check the ballast diagram. In principle, they are the same, but can be supplemented by some components.
What do we see on the board? Massive throttle - this is what you need to unsolder. We use a soldering iron for this.
3. For further work, we need a power supply from the computer (you can use it), or rather, its power pulse transformer. We get it.
The secondary winding of the transformer provides any voltage, you just need to rewind it, but it all depends on the purpose of use.
So, when the unit will be used in a car battery charger, rewinding is not required.
If it is done for a rectifier, then you need to take pulse diodes.
That's all I wanted to tell you today. I note that there are many options for modifying a block from an economy lamp, this is just one of them.
Over time, in the glove compartment of any radio amateur, a huge amount of electronic filling accumulates from energy saving lampsglasses, and many of the radio components of them can be actively used in other amateur radio directions. So a high-voltage generator from the ballast of an ordinary energy-saving lamp is assembled in 5 minutes, and voila, the Tesla generator is already powered.
As practice has shown, fluorescent lamps have been working for years. But over time, their brightness decreases. Such lamps, of course, can still serve you until the bulb filled with an inert gas breaks through with a high-voltage discharge, but it is not advisable to bring them to this state, because the electronic part may burn out, but you can still use it.
Inside the energy saver there is an electronic circuit - ballast. This is a ready-made step-up high-voltage converter type AC-DC, it is necessary to increase the standard 220 volts to 1000 volts. Attention, at its output there is a life-threatening voltage, therefore, during experiments, be extremely careful and always remember about.
To assemble the high-voltage generator circuit, we need a horizontal transformer, it can be borrowed from a horizontal scanner, right now people are massively throwing them away, so finding it is not a problem at all. Another important component of the high voltage design is the capacitor. By the way, it can also be found in the horizontal block, for example, 2200 pF 5 kV. The voltage from the ballast goes to the winding of the horizontal transformer not directly, but through the capacitor, this connection protects the ballast circuit. On the correct removal of a horizontal transformer, I suggest learning from the video:
Using a multimeter on a transformer, we find a winding with a maximum resistance (except for high voltage) and apply voltage from the ballast to it. Such a high-voltage generator can be used in experiments with electricity. If you add two metal rods - we get the "ladder of Jacob." Even on it you can assemble, because the circuit is able to power the horizontal transformer for days, and the voltage at the output of the horizontal transformer is 5 kV.
How in an hour to make a switching power supply from a burnt out bulb?
In this article you will find detailed description the manufacturing process of switching power supplies of different capacities based on the electronic ballast of a compact fluorescent lamp.
5 ... 20 Watt switching power supply can be manufactured in less than an hour. It will take several hours to produce a 100-watt power supply. http: // site /
Building a power supply will not be much harder than reading this article. And certainly, it will be easier than finding a low-frequency transformer of suitable power and rewinding its secondary windings to your needs.
The difference between the CFL circuit and the pulsed power supply.
This is one of the most common. electrical circuits energy saving lamps. To convert the CFL circuit to a switching power supply, just install one jumper between the points A - A ’ and add a pulse transformer with a rectifier. Red color indicates elements that can be deleted.
And this is already a complete circuit of a switching power supply, assembled on the basis of CFL using an additional pulse transformer.
For simplicity, deleted fluorescent Lamp and a few parts that have been replaced by a jumper.
As you can see, the CFL scheme does not require major changes. Additional elements introduced into the circuit are marked in red.
What power supply can I make from CFL?
The power supply unit is limited by the overall power of the pulse transformer, the maximum allowable current of the key transistors and the size of the cooling radiator, if used.
A small power supply can be built by winding the secondary winding directly onto the frame of an existing inductor.
If the throttle window does not allow the secondary winding to be wound, or if you want to build a power supply unit with a power significantly exceeding the CFL power, then an additional pulse transformer will be needed.
If you want to get a power supply with a capacity of more than 100 watts, and using ballast from a lamp of 20-30 watts, then most likely you will have to make small changes to the electronic ballast circuit.
In particular, it may be necessary to install more powerful VD1-VD4 diodes in the input bridge rectifier and rewind the input inductor L0 with a thicker wire. If the current transistor gain is insufficient, then the base current of the transistors will have to be increased by reducing the values \u200b\u200bof the resistors R5, R6. In addition, it is necessary to increase the power of resistors in the base and emitter circuits.
If the generation frequency is not very high, then it may be necessary to increase the capacitance of the separation capacitors C4, C6.
A feature of half-bridge switching power supplies with self-excitation is the ability to adapt to the parameters of the transformer used. And the fact that the feedback circuit will not pass through our makeshift transformer makes the task of calculating the transformer and setting up the unit even easier. Power supplies assembled according to these schemes forgive errors in the calculations up to 150% and higher. Proven in practice.
Input filter capacity and voltage ripple.
To reduce the voltage ripple at the PSU output, you need to increase the capacitance of the input filter capacitor. It is advisable that for each Watt of power of the PSU there is one microfarad or so. An increase in the capacitance C0 will entail an increase in the peak current flowing through the rectifier diodes at the moment of switching on the power supply. To limit this current, a resistor R0 is needed. But, the power of the original CFR resistor is small for such currents and should be replaced with a more powerful one.
If you want to build a compact power supply, you can use electrolytic capacitorsused in flash lamps of film "soap dishes". For example, Kodak disposable cameras have miniature capacitors without identification marks, but their capacitance is as much as 100µF at a voltage of 350 volts.
Power supply with a capacity of 20 watts.
A power supply unit with a capacity close to that of the original CFL can be assembled without even having to wind a separate transformer. If the original inductor has enough free space in the magnetic circuit window, then you can wind a couple of dozen turns of wire and get, for example, a power supply for a charger or a small power amplifier.
The picture shows that on top of the existing winding, one layer of insulated wire was wound. I used the MGTF wire (multi-core wire in PTFE insulation). However, in this way you can get a power of just a few watts, since most of the window will be occupied by the insulation of the wire, and the cross section of the copper itself will be small.
If more power is required, then an ordinary copper lacquered winding wire can be used.
Attention! The original inductor winding is energized! With the refinement described above, be sure to worry about reliable winding insulation, especially if the secondary winding is wound with a conventional varnished winding wire. Even if the primary winding is covered with a synthetic protective film, an extra paper pad is necessary!
Power supply 12 volts from an energy-saving lamp. How to make a power supply from energy-saving lamps
One of the easiest ways to make a pulsed power supply with your own hands from "improvised means" is to remake an energy-saving lamp for such a power supply. Since the main reason for the failure of compact fluorescent lamps is the burnout of one of the filament filaments, almost all of them can be converted to a switching power supply with the desired voltage. In this particular case, I remade the electronic ballast circuit of a 15-watt light bulb into a 12 volt 1 ampere switching power supply. This alteration does not require tremendous effort and a large number of parts, because the estimated load power is less than the power of the most energy-saving light bulb.
Each lamp manufacturer has its own sets of parts with specific values \u200b\u200bin the circuits of manufactured electronic ballasts, but all circuits are typical. Therefore, in my diagram I did not give the entire lamp circuit, but indicated only its typical beginning and the binding of the lamp bulb. The electronic ballast circuit is drawn in black and red. Red - highlighted bulb and capacitor connected to two filaments. They should be deleted. The green color on the diagram indicates the elements that need to be added. Capacitor C1 - should be replaced with a larger capacity, for example, 10-20u 400v.
A fuse and an input filter are added on the left side of the circuit. L2 is made on the ring from motherboard, has two windings of 15 turns each with a wire from a twisted pair Ø - 0.5 mm. The ring has an outer diameter of 16mm, an inner diameter of 8.5mm, a width of 6.3mm. The inductor L3 has 10 turns Ø - 1 mm, made on a ring from a transformer of another energy-saving lamp. You should choose a lamp with a large emptiness of the window of the inductor Tr1, since it will need to be converted into a transformer. I managed to wind 26 turns of Ø - 0.5 mm on each of the half of the secondary winding. This type of winding requires perfectly symmetrical halves of the winding. To achieve this, I recommend winding secondary winding in two wires at once, each of which will serve as a symmetrical half of each other. I left transistors without radiators, because the estimated circuit consumption is less than the power consumed by the lamp. As a test, it was connected to the maximum glow for 2 hours 5 meters RGB LED strip, consumption of 12v 1A.
Fluorescent lamps, or in other words housekeepers, have long been successfully used in many homes. Therefore, it is not a problem to find an old, even inoperative, economy lamp in the storerooms.
In order to better understand the essence of the alteration, I will say a few words about the gas discharge lamp itself, the principle of its operation. Any discharge lamp, as well as a regular housekeeper, requires high voltage, several times higher than the mains voltage.
Such a lamp has a built-in pulse converter, ballast. Usually, a half-bridge self-oscillating converter is used for this. The circuit of such a power supply is simple, it doesn’t even have extra protectionexcept fuse. But meanwhile, such a system works reliably. As for the launch target, it is built on the basis of a symmetrical diac.
The scheme is similar to the principles electronic transformerOne difference is that a storage choke is used rather than a step-down transformer. So, I want to explain in an accessible way how to get a full-fledged down-type switching power supply from the power supply of an economy lamp - this is, firstly. Secondly, to tell how galvanic isolation from the network is ensured for safe use.
The main thing that needs to be done is to refine the output using a diode rectifier and a smoothing capacitance.
1. We take a housekeeper of any power, I took a working lamp for 125 watts. He opened the lamp, removed the power supply. The flask will not be needed, so it must be disposed of.
2. Next, check the ballast diagram. In principle, they are the same, but can be supplemented by some components.
What do we see on the board? Massive throttle - this is what you need to unsolder. We use a soldering iron for this.
3. For further work, we need a power supply from the computer (you can use it), or rather, its power pulse transformer. We get it.
The secondary winding of the transformer provides any voltage, you just need to rewind it, but it all depends on the purpose of use.
So, when the unit will be used in a car battery charger, rewinding is not required.
If it is done for a rectifier, then you need to take pulse diodes.
That's all I wanted to tell you today. I note that there are many options for modifying a block from an economy lamp, this is just one of them.
Over time, in the glove compartment of any radio amateur, a huge amount of electronic filling accumulates from energy saving lampsglasses, and many of the radio components of them can be actively used in other amateur radio directions. So a high-voltage generator from the ballast of an ordinary energy-saving lamp is assembled in 5 minutes, and voila, the Tesla generator is already powered.
As practice has shown, fluorescent lamps have been working for years. But over time, their brightness decreases. Such lamps, of course, can still serve you until the bulb filled with an inert gas breaks through with a high-voltage discharge, but it is not advisable to bring them to this state, because the electronic part may burn out, but you can still use it.
Inside the energy saver there is an electronic circuit - ballast. This is a ready-made step-up high-voltage converter type AC-DC, it is necessary to increase the standard 220 volts to 1000 volts. Attention, at its output there is a life-threatening voltage, therefore, during experiments, be extremely careful and always remember about.
To assemble the high-voltage generator circuit, we need a horizontal transformer, it can be borrowed from a horizontal scanner, right now people are massively throwing them away, so finding it is not a problem at all. Another important component of the high voltage design is the capacitor. By the way, it can also be found in the horizontal block, for example, 2200 pF 5 kV. The voltage from the ballast goes to the winding of the horizontal transformer not directly, but through the capacitor, this connection protects the ballast circuit. On the correct removal of a horizontal transformer, I suggest learning from the video:
Using a multimeter on a transformer, we find a winding with a maximum resistance (except for high voltage) and apply voltage from the ballast to it. Such a high-voltage generator can be used in experiments with electricity. If you add two metal rods - we get the "ladder of Jacob." Even on it you can assemble, because the circuit is able to power the horizontal transformer for days, and the voltage at the output of the horizontal transformer is 5 kV.
How in an hour to make a switching power supply from a burnt out bulb?
In this article you will find detailed description the manufacturing process of switching power supplies of different capacities based on the electronic ballast of a compact fluorescent lamp.
5 ... 20 Watt switching power supply can be manufactured in less than an hour. It will take several hours to produce a 100-watt power supply. http: // site /
Building a power supply will not be much harder than reading this article. And certainly, it will be easier than finding a low-frequency transformer of suitable power and rewinding its secondary windings to your needs.
The difference between the CFL circuit and the pulsed power supply.
This is one of the most common. electrical circuits energy saving lamps. To convert the CFL circuit to a switching power supply, just install one jumper between the points A - A ’ and add a pulse transformer with a rectifier. Red color indicates elements that can be deleted.
And this is already a complete circuit of a switching power supply, assembled on the basis of CFL using an additional pulse transformer.
For simplicity, deleted fluorescent Lamp and a few parts that have been replaced by a jumper.
As you can see, the CFL scheme does not require major changes. Additional elements introduced into the circuit are marked in red.
What power supply can I make from CFL?
The power supply unit is limited by the overall power of the pulse transformer, the maximum allowable current of the key transistors and the size of the cooling radiator, if used.
A small power supply can be built by winding the secondary winding directly onto the frame of an existing inductor.
If the throttle window does not allow the secondary winding to be wound, or if you want to build a power supply unit with a power significantly exceeding the CFL power, then an additional pulse transformer will be needed.
If you want to get a power supply with a capacity of more than 100 watts, and using ballast from a lamp of 20-30 watts, then most likely you will have to make small changes to the electronic ballast circuit.
In particular, it may be necessary to install more powerful VD1-VD4 diodes in the input bridge rectifier and rewind the input inductor L0 with a thicker wire. If the current transistor gain is insufficient, then the base current of the transistors will have to be increased by reducing the values \u200b\u200bof the resistors R5, R6. In addition, it is necessary to increase the power of resistors in the base and emitter circuits.
If the generation frequency is not very high, then it may be necessary to increase the capacitance of the separation capacitors C4, C6.
A feature of half-bridge switching power supplies with self-excitation is the ability to adapt to the parameters of the transformer used. And the fact that the feedback circuit will not pass through our makeshift transformer makes the task of calculating the transformer and setting up the unit even easier. Power supplies assembled according to these schemes forgive errors in the calculations up to 150% and higher. Proven in practice.
Input filter capacity and voltage ripple.
To reduce the voltage ripple at the PSU output, you need to increase the capacitance of the input filter capacitor. It is advisable that for each Watt of power of the PSU there is one microfarad or so. An increase in the capacitance C0 will entail an increase in the peak current flowing through the rectifier diodes at the moment of switching on the power supply. To limit this current, a resistor R0 is needed. But, the power of the original CFR resistor is small for such currents and should be replaced with a more powerful one.
If you want to build a compact power supply, you can use electrolytic capacitorsused in flash lamps of film "soap dishes". For example, Kodak disposable cameras have miniature capacitors without identification marks, but their capacitance is as much as 100µF at a voltage of 350 volts.
Power supply with a capacity of 20 watts.
A power supply unit with a capacity close to that of the original CFL can be assembled without even having to wind a separate transformer. If the original inductor has enough free space in the magnetic circuit window, then you can wind a couple of dozen turns of wire and get, for example, a power supply for a charger or a small power amplifier.
The picture shows that on top of the existing winding, one layer of insulated wire was wound. I used the MGTF wire (multi-core wire in PTFE insulation). However, in this way you can get a power of just a few watts, since most of the window will be occupied by the insulation of the wire, and the cross section of the copper itself will be small.
If more power is required, then an ordinary copper lacquered winding wire can be used.
Attention! The original inductor winding is energized! With the refinement described above, be sure to worry about reliable winding insulation, especially if the secondary winding is wound with a conventional varnished winding wire. Even if the primary winding is covered with a synthetic protective film, an extra paper pad is necessary!
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