Anhui Sitong Optoelectronics LED Lighting R&D and Testing Center has large international top instruments such as integrating sphere, spectrum distribution meter and constant temperature and humidity chamber. According to different needs of customers, it develops new products. The LED lighting R&D room covers an area of ​​500 square meters. Several groups such as fading test and lamp structure.
Zhang Qiang, an engineer at Anhui Sitong Optoelectronics R&D Room, said that the LED lighting R&D testing center has complete R&D and testing products and excellent technical team. At present, the R&D testing center has 20 staff members who can develop and develop LED lighting products. It has traceability and service guarantee for product quality, and can also provide services for sample trial production, product inspection and inspection.
When the semiconductor diode is turned on, it is equivalent to the switch closing (circuit is turned on), and when it is turned off, it is equivalent to the switch opening (circuit cut), so the diode can be used for switching, and the commonly used model is 1N4148. Since the semiconductor diode has a unidirectional conduction characteristic, the PN junction is turned on under a positive bias, and the resistance in the on state is small, about several tens to several hundreds of ohms; in the reverse bias, it is off. The resistance is very large. Generally, the silicon diode is above 10 Μ Ω, and the bismuth tube is also several tens of kilo ohms to several hundred kilo ohms. With this feature, the diode will act as a control for the current to turn on or off in the circuit, making it an ideal electronic switch.
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