How Bluetooth work!!! Part 2\2
Bluetooth is a wireless technology standard that allows electronic devices to communicate with each other over short distances. When two Bluetooth-enabled devices come within range of each other, they establish a secure connection and begin exchanging data.
This frequency range is shared by other medical and industrial devices, such as your microwave which uses a frequency of 2.45 Gigahertz. When your microwave is turned on, it can interfere with the signal transmitted by your smartphone to your wireless headphones, causing them to lose track of the data being transmitted.Did you know that Bluetooth operates in a frequency range of 2.4 Gigahertz to 2.4835 Gigahertz?
However, this interference does not pose any danger to your Bluetooth headphones, even though they emit wavelengths similar to microwaves. Comparing the light output from stadium floodlights to the light from your smartphone screen and saying that they both use the same colors of light, so they'll both cause damage when stared at from a foot away, is an irrelevant analogy.
In addition to microwave ovens, 2.4 Gigahertz Wi-Fi networks also use this range of the electromagnetic spectrum. Similar to Bluetooth, Wi-Fi networks divide this range or bandwidth into 14 channels to accommodate multiple users communicating via Wi-Fi at the same time.
So how is it possible for your smartphone and headphones to send data every second without errors, given that many devices share similar frequencies, including microwaves that can emit stray electromagnetic waves if poorly shielded? Your smartphone does this by frequency hopping, utilizing packets, and utilizing bits for detecting errors. The circuitry in your device filters out unwanted noise.
Think of it like seeing a traffic light while driving. Your brain picks out the information that's important to you, while ignoring everything else. Similarly, your smartphone and wireless headphones have complicated circuitry that filters out unwanted signals, checks for errors, coordinates frequency hopping, and assembles the information into packets, enabling reliable and secure communication.
Before we delve into higher-level engineering concepts, we'd like to express our gratitude to KIOXIA for sponsoring this video. KIOXIA BiCS Flash Memory is used in many Bluetooth devices, such as mobile phones and tablets. KIOXIA also manufactures a wide variety of SSDs and has sponsored several of our videos exploring how SSDs work, including consumer-class and enterprise-class SSDs.
KIOXIA offers high-quality enterprise-class PCIe NVMe solid-state drives that have capacities of up to 30 terabytes and fit in the same space as consumer-class SSDs. They use a proprietary architecture built with their controller, firmware, and BiCS Flash 3D TLC memory to deliver incredibly high sustained read and write performance and reliability. Check out KIOXIA's SSDs using the link in the description.
Now, let's go into even more complicated details regarding Bluetooth. The scheme of sending a digital signal, or a binary set of 1's and 0's, by transmitting different frequencies of electromagnetic waves is called frequency shift keying. Frequency shifting means adjusting the frequency, while keying means assigning a 1 to one frequency and a 0 to another, similar to traffic light colors.
It's worth noting that the comparison to a traffic light, which emits one color and then another, is a little inaccurate because your smartphone's circuitry generates one frequency, called a carrier wave. This circuitry shifts the carrier wave to a higher frequency when it wants to send a 1 or to a lower frequency when it wants to send a 0.
This frequency shifting to transmit information is also called frequency modulation, closely related to FM radio. Bluetooth isn't limited to using just frequency shift keying; it can also use other properties of electromagnetic waves to transmit information.
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How Bluetooth work!!! Part 1\2
Bluetooth is a fascinating technology. When you listen to music on wireless headphones, your smartphone uses Bluetooth technology to wirelessly transmit millions of 1s and 0s every second. This transmission is made possible by the use of electromagnetic waves, which are invisible to the human eye and have a wavelength of approximately 123 millimeters. These waves are capable of passing through obstructions, such as walls, much like visible light passes through glass.
By Gheorghita G. I.2 months ago in 01
The Last Countdown
Diane sat in her vehicle, the downpour pattering on the windshield like a fretful metronome. The ticking of the dashboard clock synchronized with her pulse, each passing second a horrible update that she was using up all available time. White noise filled the vehicle, including the engine's constant hum, the distant drone of traffic, and the gentle hiss of rain hitting the windows. But Diane was concentrating on the courthouse across the street, and as she gripped the wheel, her knuckles turned white. She had not seen her son Ben in two years. He'd been just 18 when a terrible choice with some unacceptable group landed him in prison, and presently he was at long last being delivered. During the trial, Diane had been present and had to put up with lawyers who had told her that he would "bounce back." However, the truth was more extreme. She was aware that his time in prison had taken its toll and that he had lost some of his spirit with each passing day. Presently, with just 53 seconds to go, Diane's heart hustled quicker. She looked at the town hall, attempting to look through the downpour streaked windshield, her breath hazing up the glass. Numerous stories of hopelessness and despair had been told in the old building, and the clock tower there seemed to make fun of her anxiety. In an effort to get a clear view of the steps from which Ben would soon emerge, she wiped away the fog. Her surroundings continued to move at an indifferent pace. She heard a canine yapping somewhere out there, saw walkers clustering under umbrellas, and vehicles passing by without a subsequent look. However, for Diane, the universe had condensed to a single time and place. Everything was contingent on what would transpire in the following few seconds. Her throat tightened when the doors to the courthouse opened. The downpour and her own tears blurred the figures as they began to emerge. She immediately cleaned her eyes, looking for the recognizable step and hair wave that had a place with her child. Milliseconds felt like hours, and it seemed like time was expanding and contracting simultaneously. She paused her breathing, filtering each face for a brief look at Ben's elements, trusting that jail hadn't transformed him to an extreme. Then, he was right there. Unsure of his surroundings, a young man cautiously stepped outside while glancing around in the rain. The beat of Diane's heart stopped. He had a sharper edge to him than she remembered, and he was thinner than she remembered. However, it was her Ben—him. She pushed open the vehicle entryway, not thinking often about the ticking clock or the motor actually running. She barely noticed that the rain had soaked her hair and clothes. "Ben!" she called out, her voice breaking with urgency. Her words made it to him, but the wind swept them away. Their gazes met as his head jerked upward. Time stood still as he was recognized and trusted in his gaze. Maybe the whole world had contracted to the space between them, as though all the other things failed to issue. Ben moved cautiously forward, followed by another. Each step was loaded up with vulnerability, like he was trying the ground underneath him. As she watched him approach, Diane felt her heart pound. "Mom?" he said, his voice speculative and loaded up with doubt. She didn't pause. She surged toward him, her arms outstretched, prepared to close the hole between them. At the point when they at last impacted, maybe the most recent two years dissolved away. Diane clutched her child as though she could never give up, the tears and downpour blending on her cheeks. She reenacted each and every time they had been apart, including every moment of worry and fear, every night without sleep, and every prayer for his safety. Time restarted in that embrace, but now each tick of the clock was a new moment. The aloof world went on around them, however it at this point not made a difference. Despite everything, Diane and Ben had reunited, and their bond was stronger than ever. The downpour washed away the long stretches of torment and uncertainty, leaving them with a new beginning. The last commencement had finished, and their fresh start had quite recently started.
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