NTC thermistor is a sensor, which has been widely used in the applications of temperature measure and control. NTC thermistor is small in size, with fast response speed. However, users need to pay attention to the following points when using NTC thermistor. 1. NTC thermistor can withstand thermal shock of 200℃,but in order not to make thermal diode aging, the rapid changes should be prevented as far as possible for the packaging material is glass. 2. When the current is going through the therm...(more)
ATMC102U is a kind of mini USB color camera , which has been widely used for medical care, microscope, video conference, video phone, multimedia computer toys, industrial pipe and bottom inspection, CCTV safety supervision and other applications. There are two parts in this camera: a camera head and an USB video converter.The former has analog video / audio output signal and it is easy for the latter to connect to the computer, which can convert analog signals into digital signals.Between the tw...(more)
Laser power supply is designed to driver high current laser diodes. The output current 0-45A can be set by the analog voltage 0-2.5V. The output voltage 0-3.5V or 0-5V can also be set. In addition, our company has a professional design team and production workshop, so we can customize products for meeting customers general and special requirements. I will introduce one kind of laser power supply. Laser power supply 20A5V High efficiency: 76% Maximum output current: 20A Output voltage range: 0V ~...(more)
Laser diode is mainly made up of semiconductor materials, thus it is also called semiconductor laser, with features such as high conversion efficiency, wide band range, long service life, direct modulation capability, compact size, light weight and low cost, etc. Like most of lasers, laser diode has the same working principle, i.e. stimulated emission. The difference is that the electrons of the laser diode are distributed in different energy states of different energy bands, while the particles...(more)
Switching power supply can be divided into isolation and non-isolation circuit. In this paper, we will focus on the non-isolation circuit. According to different circuit forms, it can be divided into buck circuit, boost circuit, buck-boost circuit, cuk circuit, sepic circuit and zeta circuit. Here, we mainly analyze the working principle of DC-DC step down converter circuit. As shown in figure 1, power MOSFET is an adjusting switch element and its turn-on and turn-off are determined by the contr...(more)
We mentioned that do not power the TEC modules for a long time when there is no heat sink. Here is the right installation method: A. Install a heat sink in one side of TEC module , while the other side installs a thermal load. The installation surface flatness is less than 0.03mm. Remove any burrs or pollutant. B. Make sure a good contact between TEC module and Thermal load, as well as TEC module and heat sink. Thermal conductive pad needs to be put in the contact surface. C. Fix the TEC module ...(more)
TEC modules (thermal electric cooler), also called Peltier modules, can cool down or heat up the object when changing the current direction. The current is DC current. There are some advantages and disadvantages of TEC module. Advantages: A. No cryogen needed. TEC modules can work constantly for hours. It contains no pollution or rotating components, which results no noise and vibration, long life span and easy installation. B. Very short heating-up and cooling time due to small thermal lag in T...(more)
LED lamp usually contains a LED array. According to the preset program, LED controller can control the switch at each position in the LED lamp circuit and lighten LED regularly to show a specific text or graphics. LED lamps connect together in series, and they should be driven by a constant power supply. When using, the current control needs to be strict in order to ensure the LED lamp work normally for the brightness of each LED is determined by current. The pictures of LED lamp and LED control...(more)
