There are a lot of LED lights with customer demand is not conventional specifications, is the need to custom. But because not familiar with some of the technical parameters of LED lights, so there is a lot of demand is obviously not meet the technical requirements, even if made ??out of their use will also be affected. Here to talk about the three special note about LED lights with special custom order for the purchase of customer reference:
1, LED lights with circuit design:
LED lights with the circuit comprises a series circuit and parallel circuit, there is a series-parallel circuit.
a. advantage is that the series circuit of constant current, relatively easy to control the LED drive current. The disadvantage is that if one LED is damaged, then all the LED will not light, but it will not affect other LED life.
b. advantage of the parallel circuit is that any one LED does not affect a bad use of the other LED. The disadvantage is that if you do not add the current limiting resistor, then any one LED is damaged, it will cause the other across the LED current is increased, it will burn the other LED. And because a single LED driving voltage is low, the voltage will cause most to do useful work for is a waste of resources.
c. series-parallel circuit is a circuit LED lights with GM, because the use of several LED in series along with a group, and then other groups in parallel. You can maximize the utilization of the supply voltage, reducing wasted effort loss. Meanwhile, the use of several LED in series, can guarantee these LED drive current is the same, constant current LED beneficial to ensure that the service life of LED. After a series of LED lamps and other groups and then in parallel, you can guarantee if a group of damaged, will not affect the normal use of other groups. Also, because each has a current limiting resistor, therefore, not because of damage to a group which affect the life of the other groups.
2, LED lights with LED quantity per meter:
Typically, LED lights with LED quantity per meter is fixed. For example, 1210 is the 60 lights, 5050 was 30 lamps, special lamps is 60. If there are other special requirements, such as 50 lights per meter, which involves you want to modify the circuit. Because usually three LED a group, if it is 50 light, it would become a group number is not enough, but if a group into two LED, it would increase the current limiting resistor, this will result in a waste of resources . So, do the special requirements of custom LED lights, be sure to pay attention to the number of lamp beads is a multiple of 3, so as not to cause voltage waste of resources.
3, LED lights with cut position:
Generally, a cut is made ??in each location. But some customers will require a single LED as a cutting position, so that is unreasonable. Because in that case would be tantamount to a parallel circuit, for the life of LED lights is nothing guaranteed.