When it comes to laser diode drivers, there are certain things that need to be kept in mind. For the driving of laser diodes, special types of driver circuits are employed. They can work in 2 ways. Firstly by producing constant regulated vo...(more)
TEG is the abbreviation of thermoelectric generator, which can convert heat directly into electricity, totally opposite to TEC . TEG can be used as anti-corrosion protection for oil pipeline and gas pipeline and it can also be used as a power supply for monitoring facilities. The principle of TEG The operating principle of TEG is based on Seebeck effect found by Tomac Norahh, a German physicist. In an open circuit of two different conductors, if there is temperature difference between two contac...(more)
In 1821, Thomas Seebeck discovered when two conductors with different materials and different temperature are connected, there is current flowing in the loop However, twelve years later, J. C. Peltier discovered an opposite phenomenon, that is ,by deleting a conductor in the loop, the external current can flow through the loop, and then a temperature difference between two connecting points is appeared. This phenomenon came to be known as Peltier Effect. Owing to the limitation of material at th...(more)
As a fourth-generation automobile light source, LED (Light Emitting Diode) lamps have been widely used for producing many beautiful car style by car manufacturers. LED light has many advantages including no delay, energy saving, long life, low heat, seismic resistance and high color purity and it has taken place of tungsten filament lamps and halogen lamps in many fields. Although its cost is very high, LED lamp has incomparable advantages of good quality and high grade when comparing with incan...(more)
Semiconductor laser is also known as laser diode, which uses semiconductor materials as lasers operation materials. When comparing with other lasers, laser diode has incomparable performances, such as low driving voltage, high efficiency and safe incentive mode, so that it can be widely used for long-distance communication, digital signal storage and recovery, laser range holographic application, etc. Semiconductor laser has strict demands on working conditions and it is much affected by the ope...(more)
Semiconductor laser is also known as laser diode, which uses semiconductor materials as lasers operation materials. When comparing with other lasers, laser diode has incomparable performances, such as low driving voltage, high efficiency and safe incentive mode, so that it can be widely used for long-distance communication, digital signal storage and recovery, laser range holographic application, etc. Semiconductor laser has strict demands on working conditions and it is much affected by the ope...(more)
A glass sealed NTC thermistor is a high reliability and sensitive device, based on the technology of glass sealed diodes. It has high mechanical strength and also can prevent the performance drift caused by sensitive chips exposed to the atmosphere and the physical and chemical adsorption. While the glass is relatively high, it can be good for overcurrent protection and temperature compensation of NTC thermistors. There are two types of glass sealed NTC thermistors: axial glass sealed NTC thermi...(more)
LED electronic display screen is an electronic display, which is combined with computer technology, information processing technology, electronic technology, phonology, chromatics and other high and new technologies. The LED display screen can be divided into monochrome screen, double color screen and full color display. As the name implies, the monochrome screen is composed of a single color of LED (see figure 1). A pixel display which is in the red and green LED is called double color screen o...(more)
