Wi-Fi has had a huge impact on the use of mobile computing, allowing employees to access the corporate network from anywhere, and the coffee shop can also be the office of independent staff. But Wi-Fi also has its shortcomings, so a new standard was born: Li-Fi, if it can be successfully listed, it will be able to fill the gap in Wi-Fi technology. But Li-Fi is not a replacement for Wi-Fi, but a complement. Whether we use a smartphone, a tablet or a laptop, both will exist, which requires a special receiver and transmitter to send and receive Li-Fi signals. A special encoder/decoder chip is also needed to convert the optical signal into data. This article compares the technology of lifi and wifi, so what is the difference between lifi and wifi? We together look. Li-Fi can turn LED desk lights into wireless access points like Wi-Fi routers. In addition to providing the advantages of lighting, what are the different functions? Solve the blockage problem Wi-Fi uses a relatively limited development of radio frequency (Radio Frequency) technology, such as computers, laptops, printers, smart TVs, mobile phones and tablets must compete for bandwidth. With the introduction of more Wi-Fi-enabled devices such as refrigerators, watches, and cameras, and the data offload from mobile networks, traffic congestion has become more serious, and the quality of information transmission has also been affected. Li-Fi uses the frequency of light waves, and its bandwidth is more than 10,000 times that of RF bandwidth, and does not conflict with Wi-Fi. safety It is well known that Wi-Fi generates Electromagnetic Interference (EMI), affects aircraft equipment and medical equipment, and is potentially dangerous for power generation, or oil and gas drilling. Li-Fi uses light instead of radio waves and is safe and immune to electromagnetic interference. Data protection Radio waves can penetrate walls and ceilings, but light does not. This area distinguishes between Wi-Fi and Li-Fi in terms of data protection. Hackers or intruders outside the building can sneak into indoor computers that transmit over Wi-Fi. However, information transmitted via Li-Fi can only be accessed within the range of LED lighting. speed The 802.11a/g standard Wi-Fi provides data communication speeds of up to 54 Mbps, and there are currently technologies that can increase the speed to 1 Gbps. However, the University of Edinburgh (a research partner of pureVLC, also the alma mater of Professor Harald Haas, the father of Li-Fi) has used monochrome light sources to demonstrate 3Gbps speeds. The use of full-color (red, green, blue) LED lights can be increased to 9Gbps. Throughput In theory, Li-Fi throughput far exceeds Wi-Fi. pureLi-Fi has just released a product that allows a single small micro LED to be transmitted at 8 Gbps. The 2.4GHz and 5GHz bands are now saturated with existing devices such as wireless phones, Bluetooth devices and Wi-Fi, not to mention augmented reality, virtual reality, driverless cars and billions of IoT devices. New technology. Capacitive Touch Membrane Switch
A Capacitive Membrane Touch Switch is type of switch, which operates only when the user makes contact with the object. The Capacitive membrane switch uses sensing technology to operate the functions of switch when touched.
Capacitance switches use the humans body`s capacitance to identify touch and open/close the circuit. It requires only one electrode to operate, which is found behind a panel made of non-conductive material like glass, plastic or acrylic.
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to sum up:
Li-Fi (Light Fidelity) is a visible light wireless communication (VLC) technology equivalent to Wi-Fi. It can transmit light and light through the light of a light-emitting diode (LED) bulb, providing simultaneous illumination and wireless networking without electromagnetic interference. It will help alleviate the problem of the current surge in network traffic, and the development prospects are highly promising.