The photodiode is actually a photoresistor that is very sensitive to light changes. The die of the photodiode is a PN junction with photosensitive properties and has unidirectional conductivity, so the intensity of the light can be used to change the current in the circuit. A photodiode is a semiconductor device that converts an optical signal into an electrical signal. Its core part is also a PN junction. The structure is different from that of a normal diode. In order to facilitate the reception of incident light, the PN junction area is as large as possible, the electrode area is as small as possible, and the junction depth of the PN junction is very shallow, generally less than 1 micron. tube
There are many types of infrared receiving heads, and the pin definitions are different. Typically, there are three pins (power pin, ground and signal output pins). The receiving head of the corresponding mediation frequency should be selected according to the difference of the modulated carrier at the transmitting end. Below, Chengguangxing photoelectric infrared receiver manufacturers to explain the following considerations for using infrared receivers:
状元彩票app下载First, it should be kept clean and in good condition, especially the spherical emitting part of the front end can neither contain dirt and other dirt, nor will it be damaged by friction. Otherwise, the infrared light emitted from the die will cause reflection and scattering, which will directly affect the transmission of infrared light.
What are the classifications of infrared light-emitting diodes? Below, Cheng Guangxing infrared emission tube manufacturers to introduce to you: 1. In-line low-power infrared light-emitting diodes, specifications include: straw hat/helmet, round head, concave, ellipse, tombstone type (2*3*4) bullet, flat head, (3/5/flat head/bread type) Piranha and so on. Second, SMD SMD type infrared light-emitting diodes, conventional models are generally divided into: (3020/3528/5050/5630 these are front-illuminated) / 1016/1024, etc. These are side-illuminated light sources.
Infrared emitters are used in many industries and are commonly used in communications and sensors. What methods can increase the control distance of the infrared emission tube? Below, Cheng Guangxing infrared emission tube manufacturers to explain the method of increasing the control distance of the infrared emission tube:
状元彩票app下载The infrared emission tube is composed of an infrared light emitting diode, and the PN junction is made of a material with high infrared radiation efficiency (usually using gallium arsenide), and a forward bias is injected into the PN junction to inject a current to excite infrared light, and the spectral power distribution is a central wavelength of 830~ 950nm。 The performance of a light emitting diode is a positive temperature coefficient。 The higher the current, the higher the temperature, and the higher the temperature, the higher the current。 The power of an LED infrared diode is related to the magnitude of the current。 However, when the forward current exceeds the maximum value, the infrared diode emission power is lowered。 The infrared emission tube does not directly contact the object to be measured during the measurement process, so there is no friction, and the advantage is high sensitivity and fast response。
状元彩票app下载What is the LED injection module, what are the characteristics? Below, the LED module manufacturers come to a simple explanation: First, what is the LED injection module The application principle of LED injection molding modules comes from the injection molding process. The LED injection molding module is a component composed of a wire bead patch on a PCB and then extruded by the gravity of the injection molding machine. There are currently three main models on the market, 5050 and 5630 and 3528, which are currently widely distributed in the market. The LED injection molding module not only has a beautiful appearance, but also has a relatively high waterproof rating, reaching IP65 or above.
The LED lens is divided into a primary lens and a secondary lens. Below, Shenzhen Chengguangxing photoelectric LED infrared device manufacturers to introduce the principle of LED lens:
Relevant data shows that as the smart home industry continues to mature, the market will continue to expand。 By 2015, the global smart home market will reach $124 billion。 The forecast pointed out that 2016-2017 will be the beginning of the high-speed development period of the domestic smart home industry, the market regulation of China's smart home industry in 2017。。。
状元彩票app下载The correct detection method, principle and safety protection of infrared light-emitting diodes In the working process, the parameters of the infrared light-emitting diodes must not exceed the limit value。 Therefore, the model and parameters of the original pipe should be paid attention to when replacing the selection, and cannot be replaced at will。 In addition, the current limiting resistor of the infrared diode cannot be arbitrarily changed。。。
Infrared light-emitting diodes must not exceed the limit values during the working process. Therefore, the model and parameters of the original pipe should be taken into account when replacing the type, and cannot be replaced at will. In addition, the current limiting resistor of the infrared diode cannot be arbitrarily changed. Since the range of infrared light wavelength is quite wide, infrared light emitting diodes...