The frequency range of 433.05~434.79MHz and 2.4~2.5GHz is a domestic license-free ISM (industrial, scientific and medical) open frequency band. The use of these frequency bands does not require authorization from the local radio management, so the two frequency bands have been obtained. widely used.
Many users have many questions about the mainstream products in these two frequency bands. We have simply summarized and explained the problems that customers are concerned about, as shown in the table below.
Application selection
Based on the relatively high diffraction sensitivity of 433MHz, the 433MHz product can be actually used in the communication system of the master-slave mode in the following figure. In this way, the master-slave topology has the advantages of simple network structure, easy layout, and short power-on time. This is actually the prototype of the early smart home. 433MHz and 470MHz are now widely used in the smart meter reading industry.
The 2.4GHz application point is a networking protocol developed based on its high-speed transmission rate. The following picture shows the network structure of the intelligent security monitoring system designed by a customer for a large hotel. It uses the ZM5168 series ZigBee wireless module and is equipped with FastZigBee networking protocol. Because our designed network has adaptive function and is very powerful in power consumption. Great advantages, the project includes hotel wireless door locks, wireless smoke and other equipment. The hotel security monitoring room and front desk can monitor the security status of the hotel building in real time.
In short, if the network topology and functions are simple, one master and multiple slaves, but the network environment is complex and cost-limited, it is recommended to filter the 433MHz product preferentially; if the network topology is complex, the functions are numerous, the network is robust, and the power consumption is low. Simple development, 2.4GHz products with networking features will be your best choice.
2835 SMD IR LED supplier from China.
We produce and sell 2835 SMD IR LED , which is with the wavelength from 680nm-1550nm.
In this category, we mainly introduce the two kinds of wavelengths: 940nm IR LED and 850nm IR LED. These two wavelengths are the most commonly used wavelengths in infrared monitoring. They all can be used to monitor products.
940nm infrared LEDs are totally invisible to the naked eye, which means you can't see whether the 940nm working or not. Unless you watch it through some device(like phone's camera), which will show some purple or white color light.
The 850nm infrared LEDs have a very slight reddish when it's working, which means you can see if the 850nm LED is working.
Under the same power, radiation intensity of 850nm will be higher than the 940nm. Of course, 940nm also has its own unique advantages. It is the naked eye that is indistinguishable from work or from work, therefore, its application has been widely used in many special markets in the modern era.
We supply the 2835 940nm SMD IR LED and 2835 850nm SMD IR LED products with difference power, such as: 0.1W 940nm, 0.2w 940nm, 0.3w 940nm, 0.4w 940nm, 0.5W 940nm, 0.6w 940nm, 0.8W 940nm, 1w 940nm, 3W 940nm, 0.1W 850nm, 0.2w 850nm, 0.3w 850nm, 0.4w 850nm, 0.5W 850nm, 0.6w 850nm, 0.8W 850nm, 1w 850nm, 3W 850nm and so on.
In addition, we also add the lens on the top of SMD LED , which can make the SMD LED have an angle like those Thought-hole LED.
We also can customize the mold of ledns as you needed angle.
2835 SMD IR LED
2835 SMD IR LED,2835 SMD IR LED 940Nm,IR LED 850Nm 2835 SMD,IR Laser LED SMD 2835
Shenzhen Best LED Opto-electronic Co.,Ltd , https://www.bestsmd.com