Jiangxi Province in the industry landscape project to install Ltd., founded in 1994. For 20 years, the industry, adhering to the "Albert Hing Chinese landscape lighting design fees, a human light" corporate mission, to create the industry's well-known "in the industry" brand. In today has grown into a company with many years in the landscape lighting project design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. Design basis LED 1, LED drive power LED according to the characteristics of the design elements, which is safe to use the constant current drive type, the constant current driver circuit is characterized by: a constant current output, and outputs it as the DC voltage load resistance changes of different sizes within a certain range, the resistance load is small, the output voltage is low, the greater the load resistance, the output voltage is higher. Attentive readers may find night lighting project quote, currently on the market as the main components of the LED products, they use a simple capacitor step-down mode, constant current through a capacitor to achieve the role of these products have a fatal flaw lighting design and installation Engineering, at the moment that the switching power supply often, the LED device once burned down, because, the charge-discharge characteristics of the capacitor caused by the differential circuit where the capacitance of the capacitor is, equivalent to the internal resistance of the arc tube in the differential circuit resistor, the time differential circuit parameter t = 0.7RC, the charge and discharge at the moment t, the instantaneous current flowing through the LED great (may be up to several times the normal current even number of times) lighting design, cause a momentary permanent of damage to the chip. A higher reliability of the LED drive circuit shown in Figure 1 (compare Used LED series applications): This circuit, C 1 can be omitted, another inexpensive U1 can use diodes instead of the common drawback of this circuit is its low efficiency , when the tens (65 or less) than the arc tube connected in series, the higher the efficiency. The circuit can also be simplified, cancel U1 and C1, Q1 base can be directly connected to the lower end of R1, steady flow of 0.6/R1 decisions taken when R1 30 ohms, a constant current of 20mA. Jiangxi Province in the industry landscape project to install landscape lighting Engineering Limited is engaged in the design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. Jiangxi Province in the industry landscape project to install landscape lighting Engineering Limited is engaged in the design, budgeting, construction site management, installation, LED electronic products R & D, manufacturing and sales of high-tech enterprises. Companies with urban and road lighting engineering contractor qualification, special lighting engineering design B qualification, intelligent building three qualifications. Since the 1960s the world's first birth of a semiconductor light-emitting diode, LED lighting due to a long life, energy saving, colorful, safe, environmentally friendly features, known as the rays of light illuminated the history of mankind. Light-emitting diode LED development history: In 1907, Henry Joseph Round first observed in a piece of silicon carbide in the electroluminescence phenomenon. Nanchang lighting design, lighting and landscape lighting in the construction industry, night lighting project quotes provided by China lighting industry. Jiangxi Province in the industry landscape project to install Ltd. (www.jxzhongye.com.cn) in landscape lighting design, lighting technology smart city, night lighting engineering, lighting, interactive technology and other industries have high visibility, integrity management, quality of service both welcome to inquire or consult our "Business League call" it!