Power issues with LEDs. Why LED power supplies are often prone to damage

It's too simple **A transformer of 12V between 25-40 and 5A I don't know** There should be very few of them belonging to the high-power ones.

Generally, the transformer of many electrical appliances in the home is 12V, but the 5A current is very small.

At the same time, the LED decorative strip for the car 5A needs 60W, which is equivalent to the brightness of 600W incandescent lamp, and it is impossible to put it.

Now a single LED 1W is already considered a high power, if you have 60W, there are 60 light points, it is impossible, is it the current, you are wrong.

As far as I know, the LED light group has never heard of 60W, are you mistaken, the current is 500mA, the voltage is 12V=(2LED in parallel), 4LED series The current is just 500mA, and the average single LED current is 250mA 3V is just a line of 8 LED light-emitting points.

Because as far as I know, a 5A transformer is much, much more expensive than a 1A.

Look for it on the **, there are a lot of them, find a reputable store, and let the owner help you find a 220v to 12

V5A's power supply. There are many such products, and there are many choices, so you can choose well.

LED strip light current is small, very energy-saving to do bookshelf lighting, is very ideal, the power supply made of transformer is large, or bought 12V5A switching power supply, the most affordable small size, beautiful appearance, about 30 yuan a.

It is useless to buy a transformer. You can buy a switching power supply with 12V--5A or a higher output current.

Summary. There is no impact, LED is a wide voltage display, as long as the voltage is not high, it generally does not burn out.

Hello, I have seen your question, and I am sorting out the answer, please wait for a while There is no effect, LED is a wide voltage display, as long as the voltage is not high, it generally does not burn out.

Yes led wicks are always bad.

Is there a power adapter, install one.

We are a unit in the wick of the frequency of broken a bit high, the unit of the house is seven years old house.

You can buy a small voltage regulator, and fluctuations caused by the aging of the power supply are also possible. It's time to change the cables, it's a bit dangerous to use this way.

Can this general professional electrician repair it?

It's okay, the main thing is safety. There are too many high-powered appliances in winter.

There is heating equipment in the unit, and there is no imitation of high-power electrical appliances, how to say ......There are two hundred lamps in total, ......In the morning, 4 wicks were replaced, and in the afternoon, 3 wicks were broken in the room of the stove.

The live or neutral wire of the power supply is grounded.

There are ground wires, but the frequency of bad is increasing, and the general problem is that the probability of ** is high.

Many ground wires are fictitious, and yellow and green wires are not necessarily grounded. Is there an open-air line or is the line going to the roof?

Okay, thank you, wait until I get an electrician to check the ground wire.

It's not the ground wire, it's the live wire or the neutral wire.

The level of quality is too poor. I have used the brand for a few years and it is not bad, but it is generally broken in a few months.

Answer: LED switching power supply can not only supply power to LED power, in fact, LED switching power supply can supply power to other types of electronic equipment. Disturbance.

Explanation: LED switching power supply is an efficient and stable DC power supply, which can convert AC power into DC power and realize the switching function through circuit control. Although it includes LEDs in its name, in fact, LED switching power supplies do not only power LEDs.

Its output voltage, current and power can be adjusted according to actual needs, which can meet the power supply needs of different types of electronic devices.

Expansion: The advantages of LED switching power supply are stability, high efficiency and energy saving, so it has been widely used in electronic equipment. In addition to LED luminaires, it can also power other electronic booths and devices such as laptops, mobile phone chargers, routers, audio equipment, etc.

At the same time, the LED switching power supply also has the functions of overload protection, over-temperature protection, short-circuit protection, etc., which can ensure the safe use of the equipment.

Answer: LED switch electric jujube source can not only supply power to LED, it can supply power to other electronic products and equipment, provided that its output voltage and current meet the requirements of the slag standby to be supplied.

Explanation: LED switching power supply is an adjustable power supply, and its output voltage and current can be adjusted according to your needs. The output voltage of LED switching power supply is usually 12V, 24V, 36V, etc., and the output current can range from a few hundred milliamps to several amps.

Therefore, as long as the voltage and current of the powered equipment are within the output range of the LED switching power supply, the LED switching power supply can supply power to it.

Expansion: The output voltage and current of the LED switching power supply can be adjusted by knob or switch, so it is very convenient and practical. In addition to LED strip light and year, LED tube, LED screen and other LED products, LED switching power supply can also supply power to some equipment that needs stable voltage and current, such as wireless routers, audio, power tools, etc.

Answer: It doesn't have to be empty oak. LED switching power supplies can power LEDs, but they can also supply power to other loads.

Explanation: LED switching power supply is a kind of power supply **, its main function is to convert the input voltage into a constant output voltage and current to supply LED lights. However, in practical applications, LED switching power supplies can be applied to other old car loads, such as electronic equipment, instrumentation, etc.

Because it has the advantages of high efficiency and high precision, it can meet the needs of a variety of different loads.

Expansion: LED switching power supply is an important part of LED lighting, and its stable, efficient and reliable characteristics make LED lighting more and more popular in the market. At the same time, with the continuous innovation of technology, LED switching power supply is also constantly upgrading, such as wireless charging technology, intelligent control technology, etc., which brings more possibilities for the development of LED lighting industry.

Answer: Not necessarily, the LED switching power supply can supply power to other low-voltage electrical appliances, but the local reform needs to meet the voltage and current requirements of the electrical appliances.

Explanation: LED switching power supply is a special power supply, its output voltage and current are usually relatively low, suitable for LED strip light, LED display and other low-voltage electrical appliances to power supply. However, if the voltage and current requirements of other low-voltage appliances match the voltage and current output of the LED switching power supply, then the LED switching power supply can also supply power to these appliances.

The output voltage and current of LED switching power supply are usually relatively stable, and there is a protection mechanism, which can effectively protect electrical appliances from too high or too low voltage. Therefore, LED switching power supply is not only suitable for LED strip light and LED display, but also can be used for other low-voltage electrical appliances, such as wireless routers, cameras, etc.

However, it should be noted that the output voltage and current requirements of the LED switching power supply match the voltage and current requirements of the electrical appliances, otherwise there will be adverse consequences.

No. LED switching power supply is usually designed for LED lighting, it can power LED and control the brightness of LED to a certain extent. But LED switching flutter plexus power supplies are not limited to just powering LEDs.

LED switching power supplies can supply power to other kinds of loads, such as some applications that require stable power output, such as DC motors, electronic equipment, etc. LED switching power supplies are generally able to be lifted and compatible with these applications as long as the appropriate adjustment and control circuitry is used.

However, it should be noted that if you use LED switching power supply to supply power to other loads, you must select the correct power, voltage and current parameters according to the needs of the actual load, otherwise it may cause damage to the load and even lead to dangerous situations such as fire. At the same time, it is important to comply with all relevant safety standards and to install and use the product correctly.

Answer: LED switching power supply is not only about supplying power to LED. The sedan car bumps.

Explanation: LED switching power supply refers to a type of power supply, whose output voltage and current can be adjusted according to needs, suitable for a variety of electronic devices. Although the name includes "LED", it does not mean that it can only power LED.

In fact, LED switching power supplies can also power other types of electronic devices, such as computers, mobile phones, etc.

Expansion: LED switching power supply has a variety of characteristics, such as high efficiency, good stability, small size, etc., so it has been widely used in electronic closed talk equipment. In addition, with the development of LED lighting technology, LED switching hall side sources have also been widely used in the field of LED lighting.

LED switching power supply is a kind of transformer power supply that converts 230V 110V AC voltage into constant DC voltage, which is used to provide power conversion and protection for LED lights. The LED switching power supply is mainly designed to focus on LED lighting applications, so it can only provide a stable electric pin source for LED lamps under rated load.

LED switching power supply is mainly designed for LED lighting, so it can only supply power to LED. The working voltage of LED lights is generally low-voltage direct current, such as 3V, 5V, 12V, etc., and the LED switching power supply can convert the 230V 110V AC voltage into the stable DC power supply required by the LED lights.

Due to the relationship between the circuit structure, the LED switching power supply can be used to drive other loads before being buried, because this may lead to adverse consequences such as unstable voltage and excessive current. Therefore, when using an LED switching power supply, it is important to make sure that it is only used for LED lights, and if you need to power other loads, you should use other types of bending power supplies for power supply.

LED switching power supply is a type of power supply used for LED lamps and lanterns, usually using switching conversion power supply technology, which is more energy-efficient and stable than traditional linear power supplies. Although LED switching power supplies have LEDs in their name, they can actually be used in some other devices as well.

Parameters such as output voltage and current of LED switching power supply are designed according to the power and current demand of the LED lights used, for example, a 30W LED light in a sock hall usually needs a current of more than 2A and a voltage of about 30V to work properly. However, if the output voltage and current of the power supply meet the operating requirements of other electronic devices, the device can also be powered by LED switching power supplies. However, when using, it is necessary to inform or pay attention to whether the output voltage and current parameters meet the requirements of the equipment, so as to avoid problems such as equipment burning out.

Although LED switching power supplies have dimming functions, different power supplies may cause problems such as flickering and noise when dimming, and it is recommended to choose an LED switching power supply suitable for specific lamps to avoid these problems.

If the output current fluctuates too much, it will cause flicker. If the current is large, the brightness will be large, and if the current is small, the brightness will be small.

If the brightness changes, it will give people the feeling of flickering.

I don't know if you're talking about high-frequency flashing or low-frequency flashing?

What the general human eye can see is a low-frequency flicker within 120Hz, so some safety energy efficiency and bio-photoelectric standards have limited flickering frequencies that cannot be lower than 120Hz.

High-frequency flashes are not visible to the human eye, and can only be seen by high-speed cameras (shooting with mobile phones).

Therefore, if it is a low-frequency flash, as long as the power supply is unstable in any way, causing the output current to fluctuate too much, there will be flickering.

LEDs are divided into two types, one is a common cathode and the other is a common anode; 51 single-chip microcomputer can not use high level to directly drive LED light emitting tube, can only use low level to directly drive LED, that is, can only use common yang digital tube, but can not directly use common cathode digital tube. When connecting the common cathode digital tube, a pull resistor must be added.

Let's start with that. Common anode LEDs

When the positive end of the LED is connected to the positive power supply (+5V), the negative end passes through one.

Current limiting resistor. Connect the P port, at this time, you don't need to connect the pull-up resistor, as long as the current limiting resistor is appropriate. Although in principle, the LED input level is not allowed to exceed, but it is safe to ensure that the input protection current does not exceed the limit by connecting a current-limiting resistor in series.

At the same time, the current limiting resistor also plays the role of voltage division, the output level is 5V, and the voltage division through the resistor is is.

Common cathode LED

The negative end of the LED is grounded, and the positive end is directly P port, which should be connected at this time.

Pull-up resistor. This pull-up resistor is used to provide LED light, and when the light-emitting tube is on, the current is from the power supply - pull-up resistor - LED - ground. In this case, the pull-up resistor is also used for current limiting.

The resistance value of the pull-up resistor of 51 single-chip microcomputer is about 330K, which makes the output voltage of single-chip microcomputer just able to provide the voltage of LED without exceeding the range.

The lattice is similar to the principle mentioned above, the row and column only need to add the pull-up resistance on the side, when the number of pull-up resistors is large, the resistance can generally be used to replace a single resistor, the use of the resistance is also more convenient, the common termination power supply, other pins can be directly connected to the LED or the column of the lattice ......