How to customize a personalized led light strip

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 some special considerations about the special customization of LED lights for the reference of purchasing friends.

1, the circuit design:

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

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, taking 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 then 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 lamp with the number of lamp beads per meter and the cutting position:

Usually, the number of beads per meter of LED light strip is fixed. For example 1210 is 60 lights, 5050 is 30 lights, and in particular 60 lights. If there are other special requirements, give an example of 50 lights per meter, which 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.

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