High-power LED lamp bead selection skills

The selection of high-power LED lamp beads should be analyzed from the following nine aspects:

1, LED brightness

The brightness of the LEDs varies and the price will vary.

Lamp cup: the general brightness is 60-70lm;

Bulb: The general brightness is 80-90lm.

Note: 1W brightness is 60-110lm3W brightness up to 240lm5W-300W is integrated chip, with serial/parallel package, mainly see how much current, voltage, several strings and several.

1W red light brightness is generally 30-40lm; 1W green light brightness is generally 60-80lm; 1W yellow light brightness is generally 30-50lm;

1W blue light brightness is generally 20-30lm;

LED lens: The primary lens is generally made of PMMA, PC, optical glass, silica gel (soft silica gel, hard silica gel). The larger the angle, the higher the light efficiency. With a small angle LED lens, the light should be shot far.

2, antistatic ability

LEDs with strong antistatic properties have a long life and are therefore expensive. LEDs with an antistatic greater than 700V are usually used for LED lighting .

3, wavelength

LEDs with the same wavelength have the same color. If the color is the same, the price is high. It is difficult for manufacturers without LED spectrophotometers to produce pure color products.

White light warm color (color temperature 2700-4000K), white (color temperature 5500-6000K), cool white (color temperature 7000K or more) Europeans prefer warm white

Red light: Band 600-680, of which 620, 630 is mainly used for stage lights, 690 is close to infrared

Blu-ray: Band 430-480, of which 460,465 stage lights are used more.

Green light: Band 500-580, of which 525, 530 stage lights are used more.

4, leakage current

The LED is a unidirectional conductive illuminator. If there is a reverse current, it is called a leakage current, and the LED with a large leakage current has a short life and a low price.

5, the angle of illumination

LEDs with different uses have different illumination angles. Special lighting angle, the price is higher.

6, life

The key to different qualities is life, and life is determined by light decay. Low light decay, long life, long life and high price.

7, LED chip

The illuminator of the LED is a chip, and the price of the chip varies greatly. The chips in Japan and the United States are more expensive, and the price of LED chips from Taiwanese and Chinese manufacturers is lower than that of Japan and the United States.

8, chip size

The size of the chip is expressed by the side length. The chip size is generally 38-45mÎ©. The quality of the large chip LED is better than that of the small chip. The price is proportional to the chip size.

9, colloid

The colloid of ordinary LED is generally epoxy resin, and the LED with anti-ultraviolet and fire retardant is more expensive. The high-quality outdoor LED lighting should be resistant to ultraviolet rays and fire.

2.4G Router Module

What is 2.4g wireless module?
2.4g line module operating frequency in the range of 24400-2484mhz, can communicate through the scanning protocol, air rate up to 1Mbps, output power up to +4dBm, the module has the advantages of low power consumption, cost-effective. Movingcomm's current 2.4g antenna modules are: IOT04, IOT05, IOT09, IOT18, IOT60, etc. Users can choose a variety of modules with a transmission distance of 50-500 meters according to cost considerations.

Second, the role of 2.4g wireless module
Function 1, for the formation of a star topology wireless communication network, and must be a multi-point star topology, some extraordinary places need wireless communication. On the one hand, the transmitting and receiving module is cheap, and the cost of forming the star topology is relatively low. On the other hand, the transmitting and receiving module can adopt the modular design, which is small in size, easy to use and easy to integrate. For the wireless network with low communication speed and close distance, the transmitting and receiving module is very practical.

Function 2, for wireless multi-channel (parallel) control. Such as complex remote-controlled robots, some places require multi-channel (parallel) control. One method is to use the receiving module to directly connect to the decoder, and then connect to the relays and other electronic components to drive the subsequent controlled object; the other method is to use the receiving module to connect to the single chip microcomputer, and after the data is disposed of, the single chip microcomputer is connected to the relays and other electronic components to drive the subsequent controlled object. Usually a pair of transmitting and receiving modules can achieve up to six parallel wireless control, if the required number of channels is greater than six, you can use multiple pairs of transmitting and receiving modules, and work at the same time to meet the actual needs.

Function 3, used for general serial port, RS232 antenna data transmission, there are usually many control instruments and equipment using serial port, and communication with these devices must meet the requirements of serial port. In some extraordinary places, when the industrial control site must use the antenna transmission mode, it is natural to choose the transmitting and receiving modules mentioned in this article, but it must be explained here that to use this communication mode, the corresponding software must be prepared at the transmitting end and the receiving end respectively to achieve the conversion of file formats, in order to achieve the purpose of wireless communication, if the communication system is full-duplex. It can be achieved by using two pairs of transmitting and receiving modules, working simultaneously.

Third, 2.4g wireless module application field
2.4G wireless module is widely used in wireless health sports products, wireless mouse and keyboard, product information push, wireless remote sensing, wireless ranging system, alarm security system, smart home, toy control, tire pressure monitoring and other fields. With the 2.4G wireless module, all the whole house wireless smart home can be linked together, you can control all the smart home devices through the link of the network, and then you can control the switch of all the whole house wireless home, adjust the brightness of the lamp, adjust the rise and fall of the curtain, etc., through the continuous innovation of technology, The whole house wireless smart home can be controlled by a small white robot voice, can be controlled by a smart scene panel, can be controlled by sensors and so on.

Four, 2.4g wireless module how to choose antenna
In general, the 2.4g wireless module requires an impedance of 50 ohms, a red wire used with 2.4g, a 2.4g folded rod antenna, a 2.4g gold-plated straight head rod antenna, a 2.4g gold-plated elbow rod antenna, and a 2.4g small suction cup antenna. These antennas are special antennas designed for 2.4g wireless communication system, antenna standing wave ratio performance is good, small size, clever structure, easy installation, stable performance, with good anti-vibration and aging ability.

2.4G Router Module,M2 Wifi Module,2.4 Ghz Wifi Module,Mini Wifi Module

Shenzhen MovingComm Technology Co., Ltd. , https://www.movingcommtech.com