led leaked currently
This article paper how to use the linearity of index multimeter’s non-linear resistance grade. It states that you should analyze led ledaked currently when measuring semiconductor devices.
The next article also describes the led test of leaked currently. in a strict sense, if you are not professional, don’t try to do it on test led. must use the specialized equipment to test led. if you could not find a specialized equipment, try to use the multimeter.
we are getting multimeter (index multimeter) ready now., When a 10k register gear is change. connect led positive with black point first, then connect negative pole with red point,now the resister value is very small, That means led might be good. then ,we will go to test that led leaked currently. When measuring the led leaked currently, the red test pen should be connected to the positive electrode, and the black one to the negative electrode. again, it’s a small, that means that the leaked current is too large. and we are know that if the current is too large may has a bad effect on led security. so we need to check down the exact circumstances .

why the constant current power of led can’t allowed to no-load?
The constant current power to ensure the stable currently , no matter how load .the paper takes the ideal mode as an instant to realize the support the claim. for example we has a constant current power as 1 ampere and 1 Ohm load resistance. the output voltage is 1 voltage. the constant current power gets output resistance and output voltage is infinity when output is open-circuit. at this time the constant current power will produce of high voltage. likely corresponding to increases in the rate of damage.

_{The main constraint on development of LED switching power supply}

A kind of high frequency pulse electrical switching power supply for the led course for the future . working at the resolution limit of high frequency pulse electrical switching power supply, it will enable the ultimate in miniaturization and performance. Entering into the 21st century, the technology of LED switching power supply has obtained the unprecedented widespread application in various fields. in addition the research of LED switching power supply has great significance to saving energy, saving resources and protecting the environment

Programmable led controller

There are various led on www.ledlightmake.com. led can generate all kind of color and flare effect.led twinkle light’s sharp
blinking effect creates a warm, pleasant and peaceful feeling. so led is best choose for festival. of cause we have realized
thanks in part to the device like led controller . the led controller makes led even more lovable. this paper simply introduces
a function of programmable led controller. it is a method to control that led.
Intelligence led controller ,also call programmable led controller. how easy it is to customize the generation of your display
request. for example: the display time of led, display speed of led , display pattern of led, synchronization and asynchronism and as on,
this led controller has good scalability and practicality.

the bright office to raise our work efficiency

Where does a worker stay for longer time in his a day? the answer is office. using eyes for longer time in here. so we should give worker a bright environment to work. There was a buoyancy in the bright office. the bright environment has brought happiness feeing . and it can heighten the work efficiency . it can not only provide living security for employees, but also can enhance the employees ‘cohesiveness and work motivation, improve their performance and create more benefits for enterprises.

the led light projecting out on dark wall can inhabit that depressing atmosphere. in general ,When you are exposed to 1,000 lux, you are getting enough light for full alertness. it was a nice feeling.

A lot of our led products did a lot of those UL(Underwriter Laboratories Inc) certification. What are collecting material in need of application of UL(Underwriter Laboratories Inc) certification?In this article, i used led lamp as an example.

* Module of production different list
*Product specification
*Product BOM list
*LED circuit principle diagram, screen print layout
*Transformer and inductive specification
*Electronic element of CDF
*the label for the marketed product.
*Component part of product

The LED consists of step-down capacitor
The step-down capacitor is least expensive for led of design scheme.
In practice , resistance – capacitor circuit is also commonly used. the step-down capacitor similar to constant power supply, constant value associated with capacitance capacity. there is another a parameters capacitive reactance. we know that capacitive reactance associated with AC input voltage base on formula as follows:
1÷（2π×f×C）
by the proper choice of the controller parameters( capacitance capacity), the current stability of led is guaranteed.

What different between the system power and rated power of high power led module

Each high power led module offers a different power parameters . these parameters can be used in production specification . This thesis mainly includes that rated power and system power.

* system power: system power of high power led module is summary of whole led system.(include electricity power consume, switch power consumption, the power consumption of high led module, led supply power consumption,  and so ).
*rated power: rated power refers to led to consume power when led’s daily operation(this led module is only included in rated power).

some suggestions for the illumination system in the public area

led illumination production had advantages of high brightness , low power consumption, low-carbon environment, long service time.less save energy than 70% of the power consumption of tradition illumination advice. the utilization range is wide.

Suggestion:
*All public area using the led is best optional, the place include commercial area, industry area, and so on.

*We must actively promote the use of sensor led in public place appropriately.

*We must actively promote the use of solar energy led in open air public area

fallen in love wit RGB led modue.

RGB is color standard in  industry ,   it is display  through three color (red, green, blue) changes.and it get a variety of led color when they were superposition  at each othe. RGB is representative of three color (red, green, blue) .. This Standard covers all color (man can be sense  of all color),the RGB  of the most widely color system.