Bluetooth is a radio technology that supports device short-range communications (typically within 10m). It can exchange wireless information between devices including mobile phones, PDAs, wireless headsets, notebook computers, and related peripherals. The standard for Bluetooth is IEEE 802.15, which operates in the 2.4 GHz band and has a bandwidth of 1 Mb/s.
"Bluetooth" was originally a king of uniting Denmark in the 10th century. He unified Sweden, Finland and Denmark at that time. Using his name to name this new technical standard contains the meaning of uniting the fragmented situation. Bluetooth technology uses high-speed frequency hopping (FH, Frequency Hopping) and time division multiple access (TDMA, Time Divesion Muli-access) and other advanced technologies to inexpensively place several digitized devices (various types of mobile devices, fixed communication devices, etc.) at short distances. Computers and their terminal equipment, various digital data systems, such as digital cameras, digital cameras, and even various household appliances and automation equipment, are linked together in a mesh. Bluetooth technology will be a unified bridge for various peripheral devices in the network. It eliminates the connection between devices and replaces them with wireless connections.
Bluetooth is a short-range wireless communication technology. Electronic devices can be connected to each other through Bluetooth, eliminating the need for traditional wires. Through the wireless receiver on the chip, electronic products equipped with Bluetooth technology can communicate with each other within a distance of ten meters, and the transmission speed can reach 1 megabyte per second. In the past, the transmission technology of the infrared interface required the distance of the electronic device within the line of sight, and now with the Bluetooth technology, such trouble can be eliminated.
Bluetooth is a technical standard for short-range wireless digital communication jointly proposed by Toshiba, Ericsson, IBM, Intel and Nokia in May 1998. The goal is to achieve a maximum data transmission speed of 1Mb/s (effective transmission speed of 721kb/s) and a maximum transmission distance of 10 meters. Users can use the 2.4GHz ISM (Industrial, Scientific, Medical) frequency band without having to apply. A total of 79 channels with a bandwidth of 1 MHz are set up, and 1600 frequency/horizontal switching techniques and hobbing method of spectrum diffusion technology are used to realize the transmission and reception of radio waves.
Advantages of Bluetooth technology: support for voice and data transmission; use of radio technology, transmission range, can penetrate different substances and diffusion between substances; using frequency hopping spread spectrum technology, strong anti-interference, easy to eavesdrop; not used in all countries The limited spectrum, in theory, there is no interference problem; low power consumption; low cost. The disadvantage of Bluetooth: transmission speed is slow. Bluetooth technical performance parameters: effective transmission distance is 10cm ~ 10m, increase the transmission power can reach 100 meters, or even farther. The transceiver operates at 2.45 GHz and covers 79 channels separated by 1 MHz (from 2.402 GHz to 2.480 GHz). Data transmission technology uses short packets, frequency hopping and spread spectrum technology, 1600 times per second, to prevent eavesdropping and to avoid interference; each time a packet is transmitted, the size of the packet is from 126 to 287 bits; the content of the packet may include data or voice, etc. Information on the service. Data transmission bandwidth is synchronous connection can reach 32.6Kbps in each direction, close to 10 times the typical analog connection rate of 56kb/s Modem, asynchronous connection allows data transfer rate in one direction to 721kb/s for upload or download. The speed in the opposite direction is 57.6kb/s; the data transmission channel has 3 concurrent synchronized voice channels, each bandwidth is 64kb/s; voice and data can also be mixed in one channel to provide a 64kb/s synchronous voice Connection and an asynchronous data connection. The network connection uses encryption technology, and password authentication is used to connect devices. It can simultaneously form a Bluetooth micronet (Piconet) with other devices within 7 devices. A Bluetooth device can join 8 different micro networks at the same time. Each micro network has its own With a transmission bandwidth of 1 Mb/s, when two or more devices share a single channel, a Bluetooth micro network can be formed, and one device can control the transmission volume. When the device has not joined the Bluetooth micro network, it first enters standby mode. status.
"Bluetooth" was originally a king of uniting Denmark in the 10th century. He unified Sweden, Finland and Denmark at that time. Using his name to name this new technical standard contains the meaning of uniting the fragmented situation. Bluetooth technology uses high-speed frequency hopping (FH, Frequency Hopping) and time division multiple access (TDMA, Time Divesion Muli-access) and other advanced technologies to inexpensively place several digitized devices (various types of mobile devices, fixed communication devices, etc.) at short distances. Computers and their terminal equipment, various digital data systems, such as digital cameras, digital cameras, and even various household appliances and automation equipment, are linked together in a mesh. Bluetooth technology will be a unified bridge for various peripheral devices in the network. It eliminates the connection between devices and replaces them with wireless connections.
Bluetooth is a short-range wireless communication technology. Electronic devices can be connected to each other through Bluetooth, eliminating the need for traditional wires. Through the wireless receiver on the chip, electronic products equipped with Bluetooth technology can communicate with each other within a distance of ten meters, and the transmission speed can reach 1 megabyte per second. In the past, the transmission technology of the infrared interface required the distance of the electronic device within the line of sight, and now with the Bluetooth technology, such trouble can be eliminated.
Bluetooth is a technical standard for short-range wireless digital communication jointly proposed by Toshiba, Ericsson, IBM, Intel and Nokia in May 1998. The goal is to achieve a maximum data transmission speed of 1Mb/s (effective transmission speed of 721kb/s) and a maximum transmission distance of 10 meters. Users can use the 2.4GHz ISM (Industrial, Scientific, Medical) frequency band without having to apply. A total of 79 channels with a bandwidth of 1 MHz are set up, and 1600 frequency/horizontal switching techniques and hobbing method of spectrum diffusion technology are used to realize the transmission and reception of radio waves.
Advantages of Bluetooth technology: support for voice and data transmission; use of radio technology, transmission range, can penetrate different substances and diffusion between substances; using frequency hopping spread spectrum technology, strong anti-interference, easy to eavesdrop; not used in all countries The limited spectrum, in theory, there is no interference problem; low power consumption; low cost. The disadvantage of Bluetooth: transmission speed is slow. Bluetooth technical performance parameters: effective transmission distance is 10cm ~ 10m, increase the transmission power can reach 100 meters, or even farther. The transceiver operates at 2.45 GHz and covers 79 channels separated by 1 MHz (from 2.402 GHz to 2.480 GHz). Data transmission technology uses short packets, frequency hopping and spread spectrum technology, 1600 times per second, to prevent eavesdropping and to avoid interference; each time a packet is transmitted, the size of the packet is from 126 to 287 bits; the content of the packet may include data or voice, etc. Information on the service. Data transmission bandwidth is synchronous connection can reach 32.6Kbps in each direction, close to 10 times the typical analog connection rate of 56kb/s Modem, asynchronous connection allows data transfer rate in one direction to 721kb/s for upload or download. The speed in the opposite direction is 57.6kb/s; the data transmission channel has 3 concurrent synchronized voice channels, each bandwidth is 64kb/s; voice and data can also be mixed in one channel to provide a 64kb/s synchronous voice Connection and an asynchronous data connection. The network connection uses encryption technology, and password authentication is used to connect devices. It can simultaneously form a Bluetooth micronet (Piconet) with other devices within 7 devices. A Bluetooth device can join 8 different micro networks at the same time. Each micro network has its own With a transmission bandwidth of 1 Mb/s, when two or more devices share a single channel, a Bluetooth micro network can be formed, and one device can control the transmission volume. When the device has not joined the Bluetooth micro network, it first enters standby mode. status.
flicker free Led Driver,adpot the new MCU technology to make the Triac Dimmable LED Driver better,flicker free,noise free,load free,match 99% dimmer,Private mould non-waterproof IP20 plastic housing series, Square and round types,CE/ROHS/SAA/ETL/TUV/EMC,Input voltage can be both 110V and 220V,Wattage can be 1-80W, Perfect dimming curve, constant current 350mA 700mA 900mA 1200mA,constant voltage 12V 24V 36V, parameters can be customization,OEM/ODM is supported,Same appearances but different sizes, forming a perfect product line,Use for led panel light,led strip light and other indoor led lights
Plastic Flicker Free Led Driver
Flicker Free Triac Dimmable LED Driver,Cob Downlight Flicker Free LED Driver,1200Ma Flicker Free Driver
HAURUI LIGHTING CO.,LTD , http://www.huaruileddriver.com