LED light strip installation and use precautions

The LED strip refers to the assembly of the LED on a strip-shaped FPC (flexible circuit board) or PCB hard board, and its name is named like a tape. Because of its long service life (generally normal life of 8 to 100,000 hours), it is becoming more and more environmentally friendly and has gradually emerged in various decorative industries. Nowadays, more and more people like to use LED light strips. Here is a brief introduction to the easy installation method of LED light strips.

When the LED light strip is used for interior decoration, it is very simple to install because it does not have to withstand wind and rain. Take the LED strips produced by BHP as an example. Each LED strip has a self-adhesive 3M double-sided adhesive on the back. When installing, you can directly remove the 3M double-sided adhesive surface sticker, and then fix the light strip in need of installation. The place is just fine with your hand. As for some places that need a corner or are long, what should I do? Very simple, the LED strip is a circuit structure consisting of three LEDs in a series-parallel manner. Each of the three LEDs can be cut and used separately.

Outdoor installation is subject to wind and rain. If it is fixed with 3M glue, the 3M adhesive will be reduced for a long time and the LED light strip will fall off. Therefore, the outdoor installation often adopts the method of fixing the card slot, which needs to be cut and connected. The place, the method is the same as the indoor installation, just need to be equipped with waterproof glue to consolidate the waterproof effect of the connection point.

In addition, the LED lamp has a general voltage of 12V DC, so it needs to be powered by a switching power supply. The size of the power supply is determined by the power of the LED strip and the length of the connection. If you don't want each LED strip to be controlled by a single power supply, you can purchase a relatively large switching power supply for the total power supply, and then connect all the LED lights with the input power supply in parallel (when the wire size is not enough, you can extend it separately). Uniformly powered by the main switching power supply. The advantage of this is that it can be centrally controlled. The inconvenient place is that the lighting effect and switch control of a single LED strip cannot be realized. The specific method can be measured by its own actual situation.

【pay attention】

a. If it is not 220V light bar, please do not use AC220V to light the light bar directly;

b. Do not reverse the positive and negative poles;

c. The operator should wear an electrostatic ring.

Finally, the description of the connection method of the controller. The LED marquee belt and the RGB full-color strip need to use the controller to achieve the changing effect, and the control distance of each controller is different. In general, the simple controller has a control distance of 10 to 15 meters, and the remote controller The control distance is 15 to 20 meters and the maximum distance can be controlled to 30 meters. If the LED strip has a long connection distance and the controller cannot control that long strip, then a power amplifier is needed for tapping.

In the actual operation, you must pay attention to the connection distance of the LED strip. In general, the 3528 series of LED strips have a connection distance of up to 20 meters, and the 5050 series of LED strips have a maximum connection distance of 15 meters. If this connection distance is exceeded, the LED strip is prone to heat, which will affect the service life of the LED strip during use. Therefore, the installation must be installed in accordance with the requirements of the manufacturer, should not let the LED lights with overload operation.

LED light strip purchase considerations

There are a lot of LED strips for customer needs that are not conventional and need to be customized. However, because they are not familiar with some technical parameters of LED strips, there are many requirements that are obvious and do not meet the technical requirements, even if they are used, they will be affected. Here, I would like to talk about the three major considerations for special customization of LED lights for reference by purchasing customers:

1, the circuit design of the LED light strip:

The circuit of the LED strip includes a series circuit and a parallel circuit, and is a series-parallel circuit.

a. The advantage of the series circuit is that the current is constant, and it is easier to control the driving current of the LED. The disadvantage is that if one of the LEDs is damaged, all of the LEDs will not light up, but will not affect the life of the other LEDs.

b. The advantage of the parallel circuit is that any one LED is broken and does not affect the use of other LEDs. The disadvantage is that if no current limiting resistor is added, any LED will be damaged, which will cause the current at both ends of the LED to increase, which will burn out other LEDs. And because the driving voltage of a single LED is very low, most of the voltage will be useless, which is a waste of resources.

c. The series-parallel circuit is a common circuit for LED lamps, because several LEDs are connected in series to form a group, and then connected in parallel with other groups. It can maximize the use of the supply voltage and reduce the useless power loss. At the same time, using several LEDs in series can ensure that the driving current of these LEDs is consistent, which is beneficial to the constant LED current to ensure the service life of the LED. The LEDs in series are connected in parallel with other groups to ensure that if one group is damaged, it will not affect the normal use of other groups. At the same time, since each group has a current limiting resistor, it will not affect the service life of other groups due to damage of one group.

2, LED lights with the number of beads per meter:

Usually, the number of beads per meter of LED light strip is fixed. For example, the 1210 is 60 lights, the 5050 is 30 lights, and the special is 60 lights. If there are other special requirements, such as 50 lights per meter, this involves modifying the circuit. Because it is usually a group of 3 LEDs, if it is 50 lights, it will become a group of insufficient, but if it becomes a group of two LEDs, it will increase the resistance of the current limiting resistor, which will result in waste of resources. . Therefore, when making special requirements for custom LED strips, be sure to pay attention to the number of beads is a multiple of 3, so that it will not waste the voltage resources.

3, the cutting position of the LED light strip:

In general, each group is made a cut position. However, some customers will require a single LED to make a cut position, which is also unreasonable. Because that is equivalent to a parallel circuit, there is no guarantee for the service life of the LED strip.