How modules make cactus

I myself am an electrician at home - about the lamps and fixtures in detail

LED strip is an artificial light source, which is a narrow flexible strip with conductors up to 5 m long, on which equidistant LEDs are installed. LEDs on the tape are divided into groups. Each group consists of several LEDs connected in series and is a complete circuit that allows cutting the ribbon across into segments of any length a multiple of the length of one group. LED Strip

LED strips are available in monochrome, glowing in one color only ( red , blue , green , yellow or white ) and universal ( R G B ), the glow color of which can be changed independently using the remote control, including one of the main colors or choosing any that exists in nature. LED Strip

It is also possible to include a mode in which the color of the LED strip light will change smoothly throughout the range with a given rate of change over time. R G B LED strip

By organizing the emission of light R G B LED strips are of three types.

The first tape type uses LEDs-R-SMD3528 or LED-R-SMD5050 ( red ), LED-G-SMD3528 or LED-G-SMD5050 ( green ) and LED-B-SMD3528 or LED-B-SMD5050 ( blue ), soldered on three pieces alongside repeated triads along the entire length of the tape. Changing the color of the ribbon is achieved by a group change in the intensity of the LEDs of each color. Such LED strips are well suited for interior lighting in cases where the LEDs are hidden from human eyes. If the LEDs are visible, changing the color of the glow will be less effective. LED RGB Ribbons

R , G and B SMD3528 LEDs are 3.5 × 2.8 mm2 in size and emit a luminous flux from 0.6 to 2, 2 lumens, depending on the color of the glow. The SMD5050 series LEDs are larger in size (their size is 5 × 5 mm2) and accordingly shines brighter, the luminous flux, depending on the color of the glow, ranges from 2 to 8 lumens. Therefore, the size of the soldered LEDs on the tape, even without knowing the technical characteristics, it is easy to determine which of them will shine brighter.

In the second type of tapes, the R G B LEDs of the LED-RGB-SMD3528 or LED-RGB-SMD5050 series are used. A distinctive feature of these LEDs is that three LEDs are mounted in the same package - red , green and blue . Therefore, their luminous flux is much smaller and amounts to only 0.3–1.6 lumens for LED-RGB-SMD3528, for LED-RGB-SMD5050 it is only 0.6–2.5 lumens. But due to the fact that the color emitters are located almost at one point, a high efficiency of color gradation has been achieved. RGB LED Strip WS2812B

More recently, a new type of LEDs WS2812B (has four pins) and WS2812S (has six pins). In terms of geometry and appearance, these LEDs do not differ from LED-RGB-SMD5050. However, thanks to the installation of the WS2812 PWM controller WS2811 in the LED package, it became possible for each of the LEDs installed on the LED strip to be controlled individually by just two wires.

Thus, designers have the opportunity to change the color of the glow of any part of the tape, regardless of its length, at its discretion. The wide distribution of LED strip, created on the basis of WS2812 LEDs, is hampered by the high price and the need to use an expensive specialized controller. Without supplying a control signal to the WS2812 LED from the controller, it will not shine. LED strip marking

LED strips are marked by all manufacturers, as a rule, according to a single international standard. The class of protection in the marking is indicated in accordance with the requirements of the standard for the protection of electrical equipment from the effects of external factors IEC-952. Reference table of LED strip markings Order no. of letter or number sequence in marking Marking in Marking Interpretation of designation 1 (light source) LED LED 2 (color of luminescence) R Red G Green B Blue RGB Any CW White 3 (pin type ) SMD Wireless chip for installation directly on the printed circuit board 4 (the geometric size of the light source housing) 5050 in the example 5 mm × 5 mm 5 (the number of LEDs on the meter length) 60 pieces 6 (protection class from external factors) IP Protection class in marking denoted in accordance with the requirements of the standard of electrical equipment protection from exposure to external factors IEC-952 7 (first digit after IP, protection against the penetration of solid objects) 0 No protection 1 From penetration of bodies with a diameter of 50 mm and more 2 From penetration of bodies with a diameter of 12 mm and more, no longer than 80 mm 3 From penetration of bodies with a diameter of 2.5 mm and more than 4 From penetration of bodies with a diameter of 1 mm and more than 5 Dust allowed in an amount insufficient to disrupt equipment performance 6 Dust not allowed to enter 8 (the second number after IP, protection against liquid ingress into the case) 0 No protection 1 From vertically falling water droplets 2 From water droplets falling at an angle of 15 ° 3 From water droplets falling at an angle of 60 ° 4 From water sprayed at any angle of 5 From jets of water sprayed at any angle 6 From a strong stream of water (100 l / min, 100 kPa) 7 From water entering when submerged to a depth of 15 cm 8 From water entering during long immersion

Consider, for example, how the LED strip marking LED-CW-SMD-5050/60 IP68 is decoded. LED - LED strip, CW - white light, SMD - made on base without output LEDs, 5050 - LED case size 50x50 mm2, 60 - 60 LEDs installed on one meter of tape length, IP68 - according to the degree of protection, the tape is designed for long-term work at depth (for example, to illuminate the aquarium or pool from the inside).

If there is no IP parameter in the marking, then the LED strip has no degree of protection, that is, the degree of protection corresponds to IP00. Banner LED66 Resistance of LED tapes to moisture

According to the degree of protection from moisture, LED strips can be divided into three categories: moisture-proof, moisture-proof and moisture-proof. Waterproof LED strips can be used only in dry rooms where there is no high humidity. Waterproof LED strips are designed for use in rooms with high humidity (bathrooms, baths, facades of buildings, where direct contact with water on the tape is excluded). Moisture-proof tapes are designed to work directly in the aquatic environment, for example in an aquarium, they can be placed for lighting at the bottom of the pool. LED Sealed Tape

The photo shows a LED tape completely sealed with silicone, so the LEDs and resistors are reliably protected from water. Waterproof LED strip can be used without restrictions for outdoor advertising, light decoration of streets and buildings. When choosing a waterproof tape, it should be taken into account that part of the luminous flux is lost when passing through a layer of silicone. Density of placement of LEDs on the tape

The brightness of the LED strip depends not only on the type of installed LEDs, but also on their number. The unit of measurement is considered to be the number of LEDs installed on one meter of tape length. Than more LEDs, so naturally, the luminous flux will be more. Usually the number of LEDs per meter length of the tape lies for LED strips of 12 V in the range from 30 to 120 pieces. For LED strips designed for 24 V supply voltage, the number of LEDs can be up to 240 pieces per meter of length, in such tapes the LEDs are arranged in parallel in two rows. LED Density

But we must bear in mind that the more LEDs per meter of LED strip length, the more powerful the power supply and the more expensive the purchase will be. It is necessary to approach the choice of this parameter from the position “it is necessary and sufficient”. For example, on the meter tape there are 30 LEDs, therefore, the distance between them is 3.3 cm, which in most cases is quite enough. The choice of LED tape on the magnitude of light output

The main lighting characteristic is the intensity of the luminous flux, which is expressed in lumens per meter (lm / m). The magnitude of the luminous flux is determined by the type and number of LEDs installed on one meter of the tape. Knowing the type of LEDs and their number, it is easy to independently determine the luminous flux.

For example, 30 LEDs of the type LED-CW-SMD3528 (size 3.5 × 2.8 mm2), each having a luminous flux of 5 lm each, are installed on a meter of LED white light strip. Multiply 5 lm by 30, we get 150 lm. Such a luminous flux emits a 10-watt incandescent bulb. If the tape is made on the basis of 30 LED-CW-SMD5050 LEDs (size 5 × 5 mm2), having a luminous flux of 12 lm, then 12 × 30 = 360 lm, which is equivalent to using a 24-watt incandescent bulb. Everyone has experience in the use of incandescent lamps, therefore, using the above method, it is easy to determine the type of LEDs installed on the tape, their number and the length of the tape. And if the tape length is already determined, then perform the reverse calculation.

Perform the reverse calculation on a specific example. You need to make a ceiling light in a room measuring 5 m × 4 m. The perimeter of a room of this size will be 5 + 4 + 5 + 4 = 18 meters. You want to create a soft and not very bright lighting. If you use incandescent bulbs, then their total power should be about 200 watts, the luminous flux of which will be 3000 lm (15 lm × 200). The length of the tape should be equal to the length of the perimeter of the room, that is, 18 meters. To determine the luminous flux, which must emit one meter of LED strip, you need to divide 3000 lm by 18 meters. It turns out 166 lm / m. For our case, a ribbon with 30 LEDs-CW-SMD3528 per meter of length will be suitable. The calculation was made without taking into account the loss of reflection from the ceiling, and they are at least 50%. Therefore, to guarantee the illumination of the room, you need to choose a tape with a double luminous flux. There are two options, either take a strip with 30 LEDs LED-CW-SMD5050, or LED-CW-SMD3528, but already in the amount of 60 pcs. on the meter. The first option is preferable, as it will provide a guaranteed supply.

For R G B and monochrome LED strips, the calculation is performed in the same way as for white strips.

LED strips are not always marked, which makes calculations difficult. But to know the technical parameters of the LED strip is very simple if you use the data given in the reference table. In modern LED strips, as a rule, three types of LEDs are used: SMD3014 (super bright) measuring 3.0 mm × 1.4 mm, SMD3528 measuring 2.8 mm × 3.5 mm and SMD5050 measuring 5.0 mm × 5.0 mm Therefore, by the size of the LEDs, you can determine which type of LEDs are soldered on the tape. By counting the number of LEDs on the meter length, using the reference table below you can get data on the technical characteristics of the LED strip. Table of the main characteristics of LED strips
for voltage 12 V

With the help of the table it is easy to choose the type and length of the LED strip - an analog of incandescent bulbs. For example, to replace one 80-watt incandescent bulb with LED tape, you need to take 8 meters SMD3528 (30) or two meters of LED strip SMD3528 (120) or SMD5050 (60). Main technical characteristics of LED strips for voltage 12 V LED type LED size, mm2 Number of LEDs per meter length of LED strip, pcs. Power consumption of one meter length of LED strip, watts Light flux of meter length of LED strip, lm Equivalent power of an incandescent lamp, watts SMD3014
super-bright 3.0 × 1.4 60 6.0 600 40 120 12.0 1200 80 240 24.0 2400 160 SMD3528 3.5 × 2.8 30 2.4 150 10 60 4.8 300 20 120 9.6 600 40 SMD5050 5.0 × 5.0 30 7.2 360 24 60 14.4 720 48

The main technical characteristics of SMD LEDs are dedicated to a separate page of the site, on which you will find a specialized calculator for calculating the parameters of the current-limiting resistor for the case of self-fabricating LED strip or luminaire.

A wide range of LED strips and other LED products at an attractive price is presented on the website Design, sale and installation of LED equipment. How to connect the LED mains tape

The practice of connecting the LED strip to the power supply, including from the computer, is covered in a separate article “LED Ribbon - Installation and Installation”. Connecting the LED strip to the vehicle electrical system

LED strips are ideal for direct connection to the vehicle electrical system. The main thing is to match the tape voltage supply on-board network of the car. For cars, you need to choose a waterproof tape designed for 12 V supply voltage, for trucks - 24 V.

What voltage is installed in the car battery, for such a voltage and you need to take the tape. When connecting the LED strip to the vehicle electrical system, it is necessary to observe the polarity, the tape is marked with “+” and “-”. If the polarity is mixed up, then nothing bad will happen, just the LEDs will not glow. Connecting the LED strip to a 220 V household power supply

Unlike electric lamps, LED strips cannot be connected directly to a 220 V household electric network. They need a DC supply voltage of 12 V or 24 V. On the tape, the supply voltage is indicated along its entire length. To obtain the required voltage used voltage converters.

While there is no established terminology, they are called differently: drivers, adapters, converters, power supplies, power supplies. All these words refer to one device that converts an alternating current mains voltage of 220 V to a DC voltage of the required size, for tapes depending on type, 12 V (often used) or 24 V (rarely used, usually in RGB tapes). LED Ribbon Marking

To select the power supply for the LED strip, it is not only the amount of direct voltage at the output that is important, but also the amount of current that it can output to the load. To select the appropriate power supply for a particular case, you need to know the total amount of current that all installed LED strips will consume. Example of calculating the power supply for LED strip

For example, let's choose a power supply unit (PSU) for the LED strip, which we have chosen above to illuminate the ceiling. Usually consumed current meter tape indicated in the accompanying documentation, but if there is none, then it is easy to perform the calculation yourself. Enough number of installed LEDs multiplied by the current consumption of each of them.

We chose an LED strip with LEDs of the type LED-CW-SMD5050 installed, the tape length is 18 meters, and there are 30 LEDs per meter of length. The total number of LEDs is 18 × 30 = 540 pcs. One LED LED-CW-SMD5050 (according to the reference table) consumes a current of 0.02 A, therefore the total current consumption of the entire backlight will be: 540 × 0.02 A = 10.8 A.

But we did not take into account that the LEDs at the supply voltage of a 12 V tape are connected in series three through resistors, therefore the calculated current must be reduced three times: 10.8 A / 3 = 3.6 A. But in one LED case, the LED-CW- SMD5050 has three elementary LEDs, therefore, the resulting current must be multiplied by 3. That is, the resulting current will be 10.8 A. As a result of the calculation, it is determined that a 12 V power supply with a current of up to 10.8 A is required.

To calculate the power of the required power supply, you need to multiply the voltage by the current: 12 V × 10.8 A = 130 W; it turned out that you need a power supply with a power of 130 W. For reliable operation, a power supply unit requires 20% power reserve. As a result, a 156 watt power supply is required. Practically you can use any power supply that meets the necessary requirements.

A power unit from a stationary computer will be a good fit; such units have a capacity of at least 250 W. Since the load on the unit will not be complete, it is possible to reduce the speed of the cooler so that the noise does not interfere. How to do this is written in the article "Reducing the speed of the cooler." Usually on the power supply unit of the computer the plate is pasted, which indicates the permissible current for each voltage. Color marking of wires can be found in the article of the site “Color marking of wires of power supply units of computers”. When connecting the LED strip to the power supply from the computer, be careful, you need to connect to any black (GND, common wire for all voltages) wire and any yellow (+12 V).

He cited a detailed example of calculations in order to be able to understand the essence of the calculation. But it is possible to calculate the power of the block, without delving into the details with the help of the table above. After the tape type is selected, you need to take data from the column in the table “Power consumption of one meter of LED tape length, watts” against the tape type and multiply this number by the length of the LED tape in meters. The result is multiplied by 1.2 (the power supply must have a 20% power reserve). Here is the power of the power supply for connecting the selected tape.

For example, the calculation for the selected tape to illuminate the ceiling CW-SMD5050 with 30 LEDs per meter length. The power consumption of the meter of LED strip is according to the table 7.2 watts. Multiply 7.2 by 18 m, it turns out 129.6 watts. The result obtained is multiplied by a safety factor of 1.2 and it turns out that you need a power supply unit that delivers a voltage of 12 V with a capacity of 156 watts. As you can see, according to the table is quite simple. Connecting the LED strip to a 220 V household power supply without an adapter

I decided to publish the answer to the question that Artem from Volgograd asked in the Guest Book.

“I am inventing a bicycle: how to connect an LED strip to a standard 220 V outlet without any power supply. Somewhere I read that two LEDs connected in parallel and towards each other can be connected to alternating current without harming them for long-term operation. Then, probably, it is possible to assemble from 20 five-centimeter (or longer, if necessary) pieces (12 V × 20 pcs = 240 V) of the LED tape to a series circuit (connecting plus to minus), make another one, and then connect these circuits in parallel to meet each other, turn on in 220 V. Will it work? ”

It is possible to connect in series 20 segments of the LED strip directly into the 220 V network, but here it is necessary to consider the following.

If you connect the method proposed by you, then, firstly, the LEDs will flash with a frequency of 50 Hz, and secondly they can break through at the time of application of reverse voltage. Connecting the LED strip

It will be correct if you connect the LED strip according to the above scheme. The alternating mains voltage of 220 V is rectified with the help of a diode bridge VD1-VD4. To avoid flickering of the LEDs, the pulsations are smoothed by the electrolytic capacitor C1 for a voltage of at least 300 V with a capacity of 4.7–10 mF. Such electrical circuits are used to power LEDs in LED bulbs. It is advisable to control the current flowing through the LEDs. If it is more than the allowable, then you can add another piece of tape or limit the current in series with a resistor or capacitor, soldered to the open circuit in front of the diode bridge.

Why don't they do that? Because the areas of soldering elements are bare and they can be accidentally touched by hand, and since the circuit is not electrically isolated from the mains, this would be equivalent to touching the phase wiring of the wiring. Therefore, if you implement such a scheme of switching on the LED tape, then you must take measures to prevent accidental contact with its bare human parts.

Nowadays, LED tapes, designed for direct connection to the 220 V power grid, are on sale. They are called Duralight (duralight). The LEDs in the Duralight LED tape are connected just according to the above electrical circuit and placed in a transparent PVC tube, due to which the accidental contact of a person with dangerous contacts is excluded and the tape has become waterproof. The LED tape Dyuralayt is suitable for application as in the enclosed space, and on the street. Connecting RGB LED Strip

If the RGB LED strip is connected to an ordinary power supply, then a dynamic lighting effect cannot be achieved. All LEDs will shine continuously. You can, of course, by manipulating the switch, change the color of the glow, but it will be impossible to get a smooth color change. For such a task, a special controller with a remote control is produced, allowing to automatically change the value of the output voltages of each color channel according to a given algorithm and thereby ensure the transfusion of colors. Controller for controlling RGB tape

The photograph shows the controller CT305R, which provides a current of 5 A for each of the channels. I draw your attention to the fact that RGB LED tapes have a common wire plus. For the controller to work, its input INPUT (V− and V +) must be supplied from an additional power supply unit designed for a load current of at least 15 A, observing the polarity, a constant supply voltage of 12-24 V. Usually colored wires go from the LED tape: black, red, green and blue, which are connected to the corresponding OUTPUT terminals (V +, R, G and B) respectively.

Instead of RGB tapes, you can connect one to three monochrome tapes to the CT305R controller and control their switching order and brightness. To do this, connect the positive tapes of the tapes together by connecting to the output of the controller OUTPUT (V +), connect the negative leads each separately in any order to the OUTPUT (R, G and B)

The R G B LED strip is covered in a separate article on the R G < span> b led strip. Design and installation of LED strip

On a flexible plastic tape up to 5 m long there are thin copper conductive paths of the required configuration. The SMD3528 or SMD5050 LEDs and the current-limiting SMD resistors of the P1-12 type with a power of 0.125 W are soldered to the tracks with solder. Please note that in the designation of the LED laid its size, for example, SMD5050 has a size of 5.0 mm × 5.0 mm. With a supply voltage of 12 V, three series-connected LEDs and one or more current-limiting resistors are installed. The number of resistors is determined depending on the amount of power dissipated on them. The resistor can be placed anywhere in the circuit, in the diagram it is on the plus side, it can be installed on the minus side or between any LEDs. Electrical schematic and wiring diagram
segment of the LED tape Wiring diagram for LED tape Resistor marking

The resistor is marked with the number 151. This means that the resistor is 150 Ohms. Decoding marking is easy. It is indicated by a three-digit number. The last digit in the number says how many zeros need to be assigned to the first two digits. For example, on the resistor is marked 153, then you need to assign 3 zeros to 15, we get 15000 Ohms.

For clarity, cited below the electic wiring diagram. The complete circuit of the LED strip is a numerous number of such circuits connected in parallel. When the supply voltage is 24 V, the number of series-connected LEDs in the circuit can reach up to 10 pieces. Pay attention to the marking of LEDs, from the side of connection to the cathode (minus), the angle of the LED casing has a slice. In the photo the lower right corner. Connecting and mounting LED strips

On the tape side opposite to the LEDs, a sticky layer is applied, protected by a film. In order to fix the tape on the surface, it is enough to remove the protective film and attach the adhesive side to the installation site. When organizing the backlight with the help of LED strips, often the length of 5 meters is redundant, so it is possible to cut the tape into segments. Places where it is possible to cut the tape are indicated by the image of conventional scissors and the cut line. The step of cutting the LED strip into segments sets the number of consecutively connected LEDs. Near the cut line on both sides there are contact pads that allow soldering wires to them in the event of splicing the tape pieces together. You need to solder very carefully with a low-power soldering iron. The location of the cut LED strip

Next to the pads marked polarity of the connection and the magnitude of the supply voltage. There are special clips that allow interconnecting LED strips without soldering. Wires coming out of the LED strip

To one of the ends of the LED tape are usually soldered wires to connect to the power supply. To connect monochrome tapes require two wires; for RGB tapes, four wires are needed: black (the common one is connected to the positive terminal) and three colored. The length of the wires is no more than half a meter, and if the power supply cannot be installed near the LED strip, then the conductors will have to be extended to the desired length.

Installation and installation of LED strips is devoted to a separate article "LED tape - installation and installation." LED modules

LED strips are indispensable when you need to provide lighting or illumination at a great length. Only LED strips that are not protected from moisture can be cut into pieces, that is, only those that are intended for indoor use. Moisture-proof and moisture-proof LED strips without subsequent sealing can not be cut.

To eliminate this drawback, LED modules have been created that allow interior lighting and illuminated advertising to be easily, quickly and reliably. The scope of LED modules in practice is limited only by the imagination of man. Especially convenient modules for lighting in the car. It is enough to connect through the fuse to the on-board network and glue or fix the module inside with the screws or from the outside. LED Modules

The design of the LED modules is a shallow bed of plastic or metal, which has a printed circuit board with LEDs. From above the board is flooded with transparent silicone. Thus, protection against moisture and splashing water is provided. The LEDs are connected in the same way as in the LED strip shown above.

On the outside of the bottom of the crib there is a sticky layer, which can be fixed on any flat surface by opening it by removing the protective film. The possibility of mounting for the lugs of the modules with self-tapping screws is provided. All the lighting and electrical calculations presented above on the page for the LED strip are also valid for the LED modules.

Rectangular LED modules are sold as blocks, in the photo there is a block of 20 modules. LED Module Block

Modules are easily separated from the unit one by one or in groups. Electrically all modules are already interconnected. It is enough to apply power to any extreme of them and the LEDs on all modules will light up. Blocks can be expanded in any quantity, connecting them in parallel. About the choice of wire section for connecting LED strip

The LED tape consumes a small power, and the current consumption with a tape length of one meter, even the brightest SMD5050 (60), is no more than 1.2 A. Therefore, when connecting such a piece of tape, you can not worry about the cross section of the wire; hand stranded wire.

But when connecting a tape of 18 meters of the type LED-CW-SMD5050 (30), which we selected to illuminate the ceiling of the room above, we should seriously consider how the total current consumption will be 10.8 A. Unfortunately, I have not found anywhere what current is allowed along the copper track of the tape itself. But, knowing the power consumption of one meter of LED strip and the supply voltage, I calculated the amount of current that LED tapes of various lengths of popular types will consume, and put the results into a table. Reference table of current consumption by LED strips for voltage 12 V Type of LED strip Number of LEDs per meter length of LED strip, pcs Current consumption (A), length of LED strip length: 1 m 2 m 3 m 4 m 5 m SMD3014 60 0.5 1.0 1.5 2.0 2.5 120 1.0 2.0 2.0 3.0 4.0 5.0 240 2.0 4.0 4.0 6.0 8.0 10.0 SMD3528 30 0 2 0.4 0.6 0.8 1.0 60 0.4 0.8 1.2 1.6 2.0 120 120 0.8 1.6 2.4 3.2 4.0 SMD5050 30 0, 6 1.2 1.8 2.4 3.0 60 1.2 2.4 3.6 4.8 6.0

Since LED strips are produced with a maximum length of up to 5 meters, the manufacturer should provide the necessary cross-section of the tracks that can withstand the current consumption of LED tape, and take its value as a basis for developing an electrical circuit for connecting the LED tape to a power source.

For economic reasons, the stock of tracks for load current does not exceed 20%. Therefore, connect all four of our tape segments in series, soldering the end of one the length of jumpers with the beginning of the next LED strip is not permissible, since a current three times higher than the permissible current flows through the conductors of the tape connected directly to the power supply.

This will lead to overheating of the first tape, which is fraught with its failure, and weak luminescence included behind it. Therefore, it is necessary to connect each tape separately to the output of the power supply unit with a double wire with a cross-section of the core not less than 0.5 mm2. Below is a typical wiring diagram for connecting LED strips to a power source when organizing room lighting by installing LED strips along the corners of the ceiling behind the eaves. Wiring diagram of the ceiling lighting

Since one power supply unit is designed for a current consumption of 6 A, we had to use two identical units, powering each one half the length of the backlight. The switch connects both units simultaneously. If you use a double switch, you can turn on the tape sections. When connected to the power supply unit parallel sections of the tape, you can turn them on individually or all at the same time, changing the light design. RGB tapes are connected in exactly the same wiring diagram. Only instead of two wires are laid 4. One common and one for each color.

If one powerful power box is installed at a considerable distance from the strips, then it is advisable to stretch a pair of thick wires from the power supply unit to the LED strips. You can select the required wire cross-section for a given current by the table. For example, for our case, at a current of 10.8 A, we will need a wire with a core diameter of 1.6 mm (cross-section of 2.0 mm2). Put the junction box and already in it with thin wires connect the tapes through the terminal block or by soldering to the incoming wire from the power supply. In each case, you need to take an individual decision based on the boundary conditions.

Powerful power supplies usually have large dimensions, and it is often better to use several less powerful units, placing them in close proximity to LED strips. LED strip repair

If suddenly one of the triads of LEDs on the LED strip ceases to glow, then one of the LEDs or a resistor has failed. The tape can be repaired by replacing the LED with a good one. A faulty LED can try to find an external inspection, and if it does not work, then with the help of measuring devices. Search instructions are described in detail in the article "Repair of LED lamps."

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