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Alfombrilla de ratón larga de Keyceo Tech

Alfombrilla de ratón larga de Keyceo Tech

2021-10-19
Keyceo
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En esta página, puede encontrar contenido de calidad centrado en el mouse pad largo. También puede obtener los últimos productos y artículos que están relacionados con long mouse pad gratis. Si tiene alguna pregunta o desea obtener más información sobre el mouse pad largo, no dude en contactarnos.

En la producción de alfombrilla de ratón larga, Keyceo Tech Co., LTD concede gran importancia a la fiabilidad y la calidad. Implementamos el proceso de certificación y aprobación para sus piezas y materiales clave, ampliando el sistema de inspección de calidad de nuevos productos / modelos para incluir piezas de productos. Y creamos un sistema de evaluación de la calidad y la seguridad del producto que realiza una evaluación básica de la calidad y la seguridad de este producto en cada etapa de producción. El producto producido en estas circunstancias cumple los criterios de calidad más estrictos. Keyceo desempeña un papel importante en el mercado global. Desde su creación, nuestros productos de marca tienen una influencia significativa en el mercado. Nuestros productos son de gran valor para los clientes y son muy superiores a los de la competencia en términos de rendimiento y calidad. El resultado es que nuestros productos han traído márgenes de beneficio considerables a los clientes. Ofrecemos un soporte y servicios postventa inigualables para una alfombrilla de ratón larga y productos similares pedidos de Keyceo; todos los cuales ofrecen un valor líder en el mercado
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Celebrat TWS-W5 Bluetooth Earphone True Wireless Stereo Headset Earbuds Best Price in Kenya
Celebrat TWS-W5 Bluetooth Earphone True Wireless Stereo Headset Earbuds Best Price in Kenya
Celebrat TWS-W5 Bluetooth Earphone True wireless Stereo headset earbuds available for the best price in Kenya at DealBora Kenya, Nairobi. Call 0714179335. Place your Order online and we will deliver to your location anywhere you are in Kenya. Pay safely and easily via our Mpesa Buy Goods till number. Get the best earbuds, earphones and stereo headset from our online storeThis Bullet Wireless Ear bud is ergonomically designed to fit the shape of your ear. Having a good voice for calling or listening to music. Can be used unit (single ear) or a pair (binaural). Control of receiving calls or playing music can be done simply by tapping the earphones without touching your cellphone. Equipped with an exclusive storage case that can be directly charged while protecting earphones.• Lightweight - Each earphone weights 3.6g, lighter than a piece of A4 paper• Single & Binaural Mode - Enables you to switch between stereo and mono while you are on the go.• Bluetooth 5.0 - Allows you to stream high-quality music without the worry of interruption and being disconnected.• HD Calls - provides crystal clear communication through its high-sensitivity silicon microphone.• Single earphone only weights 3.6g, lighter than a piece of A4 paper(4.7g)• Support separate use, can be used together or separately• Ture wireless earphones with charging case and power bank(it can support mobile phone charging)The idea behind the sum of powers of 2Another pictorial proof, similar to the box packing reply, is to count the number of nodes in a complete binary tree with n1 levels. $$sum_i = 0^n 2^i$$ is the number of nodes in the complete binary tree for the levels 0 (the root) through n.If you draw an example and number the nodes like thisetc. you will notice that the left-most node of each level is a power of 2 (1, 2, 4, 8, 16, ...).so the number of nodes in the tree from root to level n is 2^n1 - 1. $$ sum_i = 0^n 2^i = 2^n1 - 1 ,. $$.Ok, so- I'm an 18 year old girl, and my parents know I masturbate, but I feel like they don't get it.?um go into the bathroom? unless they are watching you when you go number 1 and 2Guys, can you tell me some reason not to eat cheese or dairy..im going to the movies?This is really something that you have to find the motivation for from within yourself...but I hope you do not mind if I copy/paste some of my reasons for not eating animal byproducts: 1. I do not know which is worse, being brought into the world solely for slaughter or being brought into the world to be used for your milk/eggs and then slaughtered. Put very simply, when a dairy cow can no longer produce milk, she is slaughtered and made into cheap beef. Same with chickens. When they no longer lay eggs, they are slaughtered. Plain and simple. This applies to organic, free-range, and factory farmed. 2. One word - Veal. I assume that any one reading this would know what veal is, but if not I will explain it to you. In order to produce milk, a cow must give birth (no, cows are not just milk machines, they give milk for the same reasons humans do). If the cow gives birth to a female, that female is raised to also produce milk. If it gives birth to a male, that bull is raised for veal. This means that the calf is confined to a crate just big enough for him to stand up and turn around. He is given formula to ensure that he does not build up too much muscle. While we take the milk intended for him. No thanks. 3. Related to Number 2 (sort of). When male chicks are born in a layer house, they have no economic value. They are often ground up alive, suffocated, or simply thrown in a dumpster. Reading this statement makes my stomach turn. 4. It greatly decreases the lifespan of the animal. A cow can live to be well into it's thirties. The average age of a dairy cow is 5. 5. Its cruel. In other words, we do not need these products to survive and forcing cow/chicken to live in such horrible conditions simply because we like the way something tastes is wrong.
Wrist Pain Relief After Computer Mouse Use - Practical Solutions
Wrist Pain Relief After Computer Mouse Use - Practical Solutions
Introduction The original computer mouse was not invented recently by an ergonomics expert or a medical professional commissioned to design a device for millions to use every day for long hours without causing health problems. It was invented in 1963 by Douglas Engelbart, an electrical engineer and computer scientist who just wanted to control his computer. Engelbart was interested in its immediate practical application and he did not consider long-term health risks. His device was not tested for years to see if regular use could cause temporary repetitive strain injury or even permanent injury.Unnatural position Although the scientist must have thought it was a clever idea at the time, the human wrist was not designed for a computer mouse. Engelbart's first bulky, awkward mouse was crude and wooden; many refined plastic versions have been created since then in the last fifty years. But they all have one common denominator which is a problem: they essentially require the hand or wrist to be twisted or turned into the same basic position.Standard computer mouse use forces the hand and wrist into positions which are unnatural. Operating a mouse is awkward and becomes uncomfortable, because the wrist is turned up to 90 degrees from its most comfortable natural resting position.Is it therefore surprising that continually forcing the wrist into such an unnatural position for hours every day at work can cause damage or injury? Mouse use, indeed, strains your wrists and, if it happens often enough, causes chronic pain--even after staying off a computer for a few days.Switching sides Several years ago I solved the problem of wrist pain from regular mouse use by switching my mouse and mousepad to the opposite side of my keyboard. Instead of using my right hand to move the mouse, I gave it a rest; I used my left hand. I am not ambidextrous but adapted to the change easily. After a few weeks when the left wrist hurt, I switched back to the right. Alternating every few weeks like this worked fairly well for several months, but it wasn't a good long-term solution. In fact it ruined both wrists instead of just one!Wrist rest A wrist rest can provide some relief. It did help me but only when I used a computer for a few hours a day. Once I started using a computer all the time at work, it wasn't good enough. Depending on how often you use a computer, a wrist rest could be the perfect, cheap solution. Modern Mac users are lucky; the Apple keyboard is very ergonomically well designed. It has a very low profile, so you may not even need a wrist rest, although personally I use six square coasters (two rows of three) to raise it just a little (5/16").New technology Health guides from the government advise computer users to avoid repetitive strain injury by proper posture, frequent breaks, and correctly holding the mouse. But that is not necessarily an option for very busy people with demanding jobs. Technological advances have included the wireless mouse which relieves users from needing to use a mousepad, and an ergonomic mouse which allows the hand to sit in a pretty natural, relaxed position. These were valuable improvements, but why should computer users even have to use a mouse? Isn't there a simpler, safer and better way to control a computer?Mouse alternative I bought a Wacom Tablet after reading a review on Amazon.com where one owner said it provided relief for carpal tunnel syndrome. He said he used it for surfing the internet. The tablet uses a pen instead of a mouse. If you don't experience wrist pain when using a handwriting pen, you shouldn't experience any pain with the Wacom pen.I have now used the Wacom pen for over a year, and I've never felt any pain or discomfort, because the hand position in holding a pen is very close to a natural resting position. It causes very little stress. I haven't thrown out my mouse but now I only use it very rarely, and when I do, it still causes discomfort.There are several different kinds of Wacom pens which are used primarily by digital artists and graphic designers. One key difference between them is thickness. I started with a thick pen which digital painters use, but found it too bulky, so I downsized to a regular pen, which is just a little larger than a Bic pen. I wish somebody had told me about it many years ago. I believe all new computers should be sold with pens instead of mice.Conclusion The risk of repetitive strain injury from using a pen is much lower than using a computer mouse. The original computer mouse idea was conceived decades before people started using their computers every day at work and on the internet after work. Therefore there was no data on carpal tunnel syndrome or repetitive strain injuries in the workplace. Now that we as a society have gradually since the 1980s been using computers and mice more and more often, and the data has shown the damage, it is time for everybody to rethink computer mouse use. Just because almost everybody uses a mouse and it is cheap does not make it safe.
Best Gaming Mouse for Mac
Best Gaming Mouse for Mac
In this section we will discuss the best gaming mice available right now. By using a mouse we can play games easily and fast. We should not forget to mention that the best mice for gaming are also good for productivity.We will make a brief review of the gaming mouse we reviewed. We will also provide information on how to buy one, rating the product, and give a buyer's guide for it.If everyone has the same opinion on best gaming mouse, nobody will play these games. There are a few companies that have tested and evaluated different gaming mice and have produced recommendations for them.While many people still prefer experiencing the game with their fingers, desktop gaming has changed dramatically in recent years. The mouse is now a key piece of the digital gaming puzzle, and a lot of people are switching to more tactile interfaces. How do we know which mouse is best for gaming?The following article summarizes information about one of the most popular mice today - Logitech G502 Proteus Spectrum RGB Gaming Mouse with 7200 DPI.It's a physical device, so why do you need an invisible one?The mouse is a key element in the gaming industry. It determines what game you play, whether you will win or lose, and the way your character moves around.Today’s mice are as sophisticated as any computer program that can control it. They are very sensitive and can be detected almost anywhere on the screen. They have high-precision settings and include multiple buttons for different functions to help you dominate your opponents in the game of war.What these mice lack is software to make them work better with your games. Without it, they just feel like a keyboard and mouse; but if they were able to offer more options for gamers like custom settings for DPI (dots per inch) or buttonThe gaming mouse market offers a wide range of options to choose from when it comes to mechanical gaming devices. They are all made with the latest technologies and feature advanced features. And as long as you are looking for a top-notch gaming mouse, then you should have a look at the Top Gaming Mouse 2019.It has been a long time since we have had a device that is both high-end and affordable. The new Razer Sphex takes this into consideration by combining elegant design and quality components with an exceptional price.The gaming mouse is a must-have for any PC gamer. Its importance is not limited to the gaming world, but also for the production and design work.The gaming mouse is one of the most important and defining features in any computer. It allows you to move your hands and fingers to perform complex movements in game without having to use your mouse pointer or main controller. The mouse can also be used as a pointer for other tasks such as selecting items on a list or taking screenshots. It's also worth noting that many people prefer mice with a "click-less" keystroke, which means they don't press the keys all the time when they want to make a small movement. This saves them from picking up the mouse accidentally, something which is not very convenient right now if you are using two hands, especially while playing games where you need both hands for controlling character actions and camera movements.The best gaming mouse for PC gamers can be a challenge. After all, you can't just pick up a mouse from the store shelf and expect it to fit your hands. PC gaming is all about the physical contact with the mouse, so you have to see to it that your hands are comfortable and not hurting. This is why we look at different aspects of a gaming mouse, including comfort and design, so that we can find which one will make you more comfortable and efficient while playing games.We should not think of the gaming mouse as a toy. It is an exceptional tool for professional gamers who spend a lot of time using it in battle. It has been designed with the same level of quality that one would expect from an expensive gaming device.
Best Bluetooth Headset 2021: Top Picks for Hands-free Conference Calls and Home Working
Best Bluetooth Headset 2021: Top Picks for Hands-free Conference Calls and Home Working
Plantronics simply makes phenomenal Bluetooth headsets, which is why it should come as no surprise that this is not the first Plantronics headset to make it on the list of the best Bluetooth headsets, and it certainly wo not be the last. The Plantronics Explorer 500 is built to be compact and discreet, but there is a huge amount of tech built into this tiny package, including three microphones and a boom arm for stellar voice quality. Its small size does mean its battery life is not exactly on the same level as some competitors, but at seven hours of talk time it's still very passable.• You May Also Want to Knowdoes a headset come with the ps4?Not unless that particular retailer is putting on a bundle deal on their own. Normally it's just the console, power cord and one controller.Care to answer a question about using an Xbox 360 headset?I just keep mine on. But when you leave a party cut it off,because other people will be able to hear you.Detect when an Oculus headset is stationary/idle using transform.hasChangedIf you are using the Oculus SDK instead of OpenVR you can check with the proximity sensor of the oculus if somebody is wearing it or not. If I understood your use case right, this would be the preferred solution.This worked for me on a RiftCheck if OpenVR / SteamVR / OculusVR headset is mounted on your headIn Android, there is the Proximity Sensor. This is used to disable the screen when you are calling someone. I am not sure if you have access to the proximity sensor in Unity, but you can call the native method through Unity.What's the best Xbox 360 headset ?I do not recommend buying third party accessories for you Xbox 360. I recommend you buy the official Xbox 360 Wireless Headset. I hope this answers your question.Bluetooth headset with poor sound quality on UbuntuI had to do both setting the main.conf to multiple profiles then remove the headphones and add them back and then they defaulted to High FidelityWhy is it so hard to buy an Oculus Quest VR headset?Because you should not get it now, but wait for Oculus Quest 2.But that's more an opinion. If you were looking for an Oculus Quest during Corona times, I think they were merely sold out and suffering from supply chain issues. But right now I believe resellers are starting to delist them out of the way of Oculus Quest 2. You might find a good deal for 300$, or they might all be sold this christmas and Oculus Quest 2 will take their place.We will seeHow to choose a very good gaming headset?that is an outstanding gaming setup. i could a recommend a seven hundred-750 watts psu, attempt to discover CORSAIR TX750, i am using it and its useful. As for the Sound card you are able to get ASUS Xonar Essence STX, its an exceedingly good sound card. i could additionally upload which you dont want that an excellent number of ram, you are able to have stored money for the image Card. desire i helped !.I have Sound Blaster Audigy and have installed it along with programs, but can't talk through the headset?Crap I had this problem right before I switched to Vista. You need to say what O/S you have. Try this. Goto Control Panel/Sound and check around there to see what is activated. Go to sound setting and turn up the mic and speakers to mute. Also check in the game settings for the mic option. I am guessing right now though but I had the same card on Win XP and after an evening I got it to work. I got realy pissed though...lol Do a search on google if all else fails. You WILL find an answer!Can a DECT 6.0 phone system accept any DECT 6.0 handset or headset?You need to look for kit that is compatible with GAP - Generic Access Profile. These devices interwork, though not all extended features are guaranteed to functionis there a way i can use two headset/mics on my mac at the same time?nicely practically you cant have an identical mac address for 2 diverse gadgets its a actual address assigned by the the produces undesirable ingredient is there are application that could clone your mac address then what happens is the community know it as between the device in that community nicely you already know there are a number of holes interior the technologies field so the undesirable adult adult males can pass by it :(Will the Steelseries Siberia Elite headset work on the xbox one?Siberia ElitesDo I need a sound amplifier for my headset ?check your Mixers first. you have two sliders the stereo mix and the volume mix oh and make sure you obey colour coding sockets Green for headphonesCan I use an XBOX headset to commentate videos?No, there is no adapter that would be able to transmit the audio to your laptop or desktop. Just buy a microphone from best buy. Or use your laptop's mic if it has oneCan a gaming headset work if it only is connected with a USB?Yes you can,averagely. But It still depends on its kind and basic functions.should i get a wii or xbox live stuff?(headset,adapter,and subscription)?due u shuld get tha stuff 4 tha xbox trust me i had a wii it is ***** gay tha games suk n everything else suks toBose 2 Bluetooth headset doesn't show in Dragon Naturally Speaking 12 Audio DevicesI also had a problem setting my Bose Series 2 with a Windows 8 tablet. It turned out I had paired it with my phone first and there is a different paring procedure for devices after the first one. The call / large push button on the Bose needs to be pushed for about 5 seconds while paring it to devices after the first device.best "hear enemies" headset for xbox 360?Turtle Beach X1's are the way to go, they are totally worth that $60. AX180's sound quality is definately not as good because i have tried them and it just didnt sound as rich as you would think they would. The fixed bass boost on the X1's are what help you hear footsteps the most and they really work that well for most people.Would Gamestop take a Turtle Beach X32 headset for cash?No they do not, I tried to trade in a DJ Hero controller and they said they do not take used accessoriesnew headset for nokia 5233 Price?how about Nokia BH-503? Product Description Nokia BH-503 Bluetooth Stereo Headset: High-Quality Audio Streaming from Bluetooth Device. Over-the-Ear Headphones. Power, Call, Media and Volume Keys. Music Pauses for Incoming Call. Up to 11 Hours Music/Talk Time.Where can i get an good Xbox live headset for under $50. I mainly play Halo 3.?cell phone or go to targetWhich Bluetooth headset got the best reviews for noise reduction?Plantronics 510 and BlueAnt Z9iIs recharging a blue tooth headset before it dies bad for the battery? ex. use it 4/8 hours then charge it ?The only battery type that has this problem is NiCad. Any other battery, NiMH, Li-Ion, etc, can be charged anytime you wish without worrying about discharging them firstLaptop has no sound (T60 with XP SP2) from either the headset or laptop's built in speakers.?Did they ever work? If you plug in headphones, do they work?Why do helicopters and airplanes use different headset plugs?It's a holdover from the old days when microphone technology was not as advanced. The military adopted "dynamic microphones" as the standard, which were less noisy than the alternative "carbon microphones." Carbon microphones required a DC bias voltage to operate, and the dynamic ones did not. Fast forward to current airplane microphones, which are electric, and still use a bias voltage, so if you plug a military dynamic microphone into a civilian airplane jack, the microphone would burn out from the voltage.So what? Well, helicopters were originally very military oriented, so they all were wired for dynamic microphones. They used a different jack to avoid accidentally plugging the wrong type of microphone into the wrong type of jack. Even though helicopters are widely used outside of the military now, the standard remains, and many emergency radio equipment (fire, medical, police, etc) still uses the dynamic standardWhy wont my philips headset work with my cobra 2 way radios?Had the same problem with my Zeon Try contacting trbearcom service center I had email them for some queries. They help me figure out the problemis it possible to watch and listen to musics or videos on the computer with this headset?heck yes there headphones there made for computers u could hear but u dont have to use the microphoneReason behind not wearing headset at Airplane?So you can hear when they say 'oy mate, we've crashed so put yer oxygen mask on'Good usb PC Gaming headset?I went to ultimate purchase a pair of year in the past and offered the Microsoft Lifechat LX-3000 for approximately $30-40. It has worked large and shall we me play video games on the comparable point as those with Turtle seashores. needless to say, in case you prefer the great high quality of Turtle seashores, then purchase them. they are going to be plenty greater high priced, nonethelessXbox 360 headset not working with rock band drums and guitar?It does not plug into the chatboard either. Get a wireless one.1 inch threadless headset with hollow cap for cable routingYou are looking for a Potts Mod, which allows you to route the front brake cable down through the fork's steerer and out to the front brake caliper.This will allow the front fork/wheel/bars to do a complete rotation without binding on cables.A Potts Mod does not work for a back brake - for that you require a "detangler" or to fit coaster brakes, aka back-pedal brakes.What PS4 games can you play with the move controllers without the VR headset?Try Sportsfriends. There's a mode on there called Johann Sebastian Joust, in which you must keep your Move controller still, unless you move it to the classical music playing in the background. The aim is to try knock other people's controllers over. While I have not played it myself, I've seen people play it and it looks fun. Stay peachy,Stef (>‿â—).A simple Mind Reading gaming headset has been announced for only $299, is this legit?a million) think of of a significant selection between 2 and 9....ok? ok then 2 2) Multiply by using 9...ok? ok then, 18 3) you have now have been given a 2 digit extensive type (like 26) suitable?...upload the two digits at the same time...ok? a million8=9 4) Subtract 5 from this single digit answer. ..ok? 4 keep in mind this final answer. .... 5) If A=a million B=2 C=3 D=4 E=5 F=6 G=7 H=8 I=9. What letter is going which includes your very final answer? ok? d 6)think of of a rustic (no longer city) that starts off with that letter...ok? dominican republic 7) Take the 2d letter of that u . s . ....think of of an animal/mammal that starts off with that letter.ok o so orangutan 8) think of of the frequently happening shade of that mammal..ok? ok then, i think of they are orange NOW. .. definite Say OUT LOUD, the colour, the animal and the rustic.. eg crimson fox from Belgium... orange orangutan from the dominican republic how many have been given an identical answer as i am attempting to implant into your minds????..>>>> what became it back gray Elephant from Denmark!! nope. EDIT: properly i knew it, yet whilst people do not be attentive to that, theres dominica, djiboutiIs there a Ps3 slim box that comes with a headset?Nope, Sony does not ship out PS3s with Headsets. all they give you is wires, controller and a Blu-Ray introductory disc about PS3. Anything else that you would want is sold separately.
Steelseries Gaming Glove
Steelseries Gaming Glove
Marmite, as most know is a love it or hate it product, and the manufacturers of Marmite know this. Did Steelseries use this as a concept when they designed their gaming glove, because, to be quite hon... Marmite, as most know is a love it or hate it product, and the manufacturers of Marmite know this. Did Steelseries use this as a concept when they designed their gaming glove, because, to be quite honest, it is a love or hate product. The gaming glove is loved by only a few people in the office. Others think it pointless, are skeptical, and a few say that it is a seriously nerdy product (and not in a good way). But does t his make it a bad product? Since we have nothing to compare it to we've come up with our own tests and ratings. So where does this glove come in handy? Well, if you don't have a decent palm rest on your keyboard then you will find that the glove makes moving over any surface that you have beneath your wrist a lot easier, especially when it's hot and sweat becomes a factor. It works well for typing but does it work for gaming? The answer: yes and no. While professional gamers usually have matches scheduled, amateur gamers play games on the spur of the moment, and putting on a glove just to play games can be a hassle. Getting used to the glove took (those who did like it) about two days, which might not seem like a long time but we are talking over 16 hours of gaming and computer use. 16 hours is actually a long time to get used to something that is supposed to help your gaming and wrists in particular. Let's for example say you bought one, and you liked it, and you got used to it, would it make using a mouse easier and more comfortable? There is only one answer, a resounding yes. Any gamer will tell you that sweat and mice do not go together, this glove therefore helps to stop your sweaty palm and your gaming mouse from ever meeting. This helps for grip and you no longer need to dry your sweaty hand during an intense gaming session. On a side note, it was so comfortable that when the team went to get pizzas , a certain hardware writer forgot it on after he left the office.
Circuit Diagram of Wireless Mouse Design
Circuit Diagram of Wireless Mouse Design
Electronic enthusiasts provide you with the , hoping to help you!The device uses the codec circuit MC145026 / MC145027 and the RF transmitting / receiving module tda1808 / tda1809 to cooperate with each other. It can flexibly operate the mouse within the range of 10 120m. Moreover, it does not need to make any changes to the appearance and internal circuit of the original mouse, and the use is in line with the operating habits, Convenient and reliable, very suitable for self-made lovers.Generally, there are four circuit connecting lines inside the connecting line between the mouse and the computer (the circuit device can accept up to four data lines, and the reader can choose according to the actual situation of his mouse). They are power cathode, power ground, data line 1 and data line 2 respectively. We cut off the mouse connection, find out the four lines respectively, use the data transmission terminals D6 and D7 of MC145026 coding circuit to receive the data transmitted from mouse data line 1 and data line 2, and transmit it through RF transmission module tda1808 after coding in the chip.After the radio frequency transmitting module tda1809 works, the received coding information is input into the MC145027 decoding circuit. After conversion, the signals of the original mouse data line 1 and data line 2 are restored at the data output terminals D6 and D7 of the chip, and sent to the computer through the connection line between the original mouse and the computer.It can be seen that there is no need to change the mouse and computer, no need to install additional mouse driver software, and all functions of the original mouse can be used normally.The circuit (see Fig. 1 and Fig. 2) can work without debugging as long as the selected components are normal.
Diseño y aplicación de conversión de frecuencia basada en UC3846
Diseño y aplicación de conversión de frecuencia basada en UC3846
1. Introducción del chip de control de ancho de pulso actual UC3846 Las principales características de UC3846 son: (1) compensación automática de avance; (2) Pulso programable por límite de corriente de pulso; (3) Configuración de extracción de empuje, corrección automática de simetría; (4) Capacidad de operación paralela del sistema modular de suministro de energía; (5) Características mejoradas de respuesta de carga; (6) Detector de corriente diferencial de circunferencia de modo amplio común; (7) Supresión de doble pulso; (8) Salida de doble columna de 500mA; (9) Cerradura de bajo voltaje; (10) Arranque suave; (11) Protección de apagado de salida; (12) El rango de funcionamiento es de hasta 500KHz. El siguiente es su diagrama de bloques interno: Pin 1 es el terminal de ajuste del nivel actual; Pin 2 es el terminal de salida de voltaje de referencia; Pin 3 es la entrada inversora del amplificador de detección de corriente; Pin 4 es la entrada en fase del amplificador de detección de corriente; Pin 5 es la entrada en fase del amplificador de error; Pin 6 es la entrada de inversión del amplificador de error; Pin 7 es la compensación de retroalimentación del amplificador de error; Pin 8 es el puerto de capacitancia externa del oscilador; Pin 9 es el puerto de resistencia externo del oscilador; Pin 10 es el puerto de sincronización; Pin 11 es la salida de pulso PWM; El pie 12 es el suelo; Pin 13 es el terminal de alimentación del colector; Pin 14 es el puerto de salida B del pulso PWM; Pin 15 es la entrada de potencia de control; Pin 16 es el puerto cerrado. 2. Diseño del circuito de conversión de frecuencia UC3846 y análisis específico 2.1. Principio de ampliación UC3846 UC3846 es un chip de control de modo de corriente, con un sistema de control de doble bucle cerrado de voltaje y corriente, y las características de frecuencia de amplitud cambian de polos dobles a polos individuales. Por lo tanto, el ancho de banda de ganancia es alto, la amplitud de estabilización de voltaje es y tiene buenas características de respuesta de frecuencia. Los amplificadores de 3 y 4 pines de UC3846 se utilizan como sección de detección de corriente para cambiar el ancho del pulso de la columna de tótem de salida a través de G = vpin7 / vpin4. El alto nivel es de voltaje de 1 pin más el voltaje de triodo incorporado de 0,7 V, y el nivel bajo es de aproximadamente 0,7 V, que es de 0 a 1V. Es un valor constante. Aquí, el ancho del pulso de salida se puede cambiar cambiando. Cuando G se hace más grande, el ancho del pulso de salida se vuelve más estrecho para lograr la estabilización del voltaje. El bucle de voltaje de UC3846 es un amplificador de retroalimentación negativa de voltaje compuesto por 5 pines, 6 pines y 7 pines. Aquí, el regulador PI está compuesto por R13, R25, C2 y C6, de los cuales el pin 5 es el terminal de configuración de voltaje y el UF es el terminal de retroalimentación de voltaje. Cuando el voltaje de retroalimentación es mayor que el voltaje dado, el ancho del pulso de salida se vuelve estrecho para lograr la estabilización del voltaje. El bucle de corriente y el bucle de voltaje se complementan entre sí. 2.2. Diseño de circuito de frecuencia de anchura variable UC3846 Figura 2 Diagrama esquemático del circuito de conversión de frecuencia El circuito de conversión de frecuencia está compuesto por D6, D7, R6, C12, zd3, R5, D5, Q3 y C11. Cuando el ancho del pulso del bucle de voltaje o el bucle de corriente cambia, la zona muerta de la forma de onda que pasa a través de D6 y D7 se ensancha gradualmente, el tiempo de encendido de Q2 aumenta, el tiempo de carga de C11 se acorta y la frecuencia de salida aumenta. C12 juega el papel de la integración y acumula pulsos de tiempo muerto. Zd3 puede inhibir la espiga. Si es la entrada del rectificador de corriente resonante, y un circuito integral RC se forma a través de R15, R20, R14, R23 y C5 como el amplificador de detección de corriente en fase El bajo nivel del circuito integrador lo proporciona la banda muerta de la columna de tótem de salida. Cuando dos tótem tienen banda muerta, LM339 emite un nivel cero y borra el voltaje C5 a un nivel alto. LM339 salidas de alto nivel y C5 está cargado. Por lo tanto, los hasta 4 pies son ondas triangulares. La entrada de inversión del amplificador de detección de corriente de transmisión es tierra. 3. El circuito de conversión de frecuencia se aplica al circuito resonante LLC El inductor resonante LLC ha atraído mucha atención debido a sus ventajas de alta eficiencia, entrada de amplio rango y conmutación de voltaje cero. El diagrama esquemático de la corriente de medio puente resonante LLC se muestra en la Figura 3. Las principales rutas eléctricas del circuito son LR, LM y Cr para formar el circuito resonante LLC, en el que hay dos puntos resonantes. La resonancia de medio puente LLC logra el efecto de la estabilización de voltaje al cambiar la frecuencia. Por lo tanto, el circuito de conversión de frecuencia de UC3846 se puede aplicar al controlador de la fuente de alimentación resonante LLC. Cuando la frecuencia es superior a FR1, se puede realizar una conmutación de voltaje cero, por lo que la frecuencia es superior a FR1 en este diseño. 4. Ejemplos de diseño y conclusiones Tomando como ejemplo un convertidor de medio puente resonante de 48W. El voltaje de entrada es dc130v y el voltaje de salida es 24V. La siguiente es la forma de onda experimental: Figura 4 Sin carga de forma de onda de corriente resonante Figura 5 Forma de onda de corriente de resonancia 2A Dado que el voltaje de entrada de V2F debe ser DC, la forma de onda de corriente resonante pasa aquí a través del puente rectificador. Cuando la carga cambia de sin carga a 2a, la frecuencia cambia de 50K a 42K. La frecuencia de trabajo es más alta que FR1 para realizar la modulación de frecuencia y la estabilización de voltaje. 5. Conclusión Al analizar las ventajas del chip de modo de corriente UC3846, se discute el diseño del circuito de modulación de frecuencia. Los experimentos en el prototipo del convertidor resonante LLC verifican la efectividad y la practicabilidad del circuito de modulación de frecuencia UC3846.
¿Qué marca de auriculares baratos con reducción de ruido es buena? Cabezal de reducción de ruido barato y fácil de usar
¿Qué marca de auriculares baratos con reducción de ruido es buena? Cabezal de reducción de ruido barato y fácil de usar
Hoy en día, cada vez más personas buscan los airpods, pero el precio de los airpods no es barato. Ahora, el precio de los productos de segunda generación sigue siendo alto, demasiado alto para la fiesta estudiantil. De hecho, hay muchos auriculares Bluetooth con reducción de ruido baratos. Hoy compartiré algunos auriculares de reducción de ruido baratos y fáciles de usar. Destacado: reducción de ruido de llamada de micrófono dual y soporte de reducción de ruido adaptativo dinámico Los auriculares con reducción de ruido activa Nank A2 son unos nuevos auriculares que acaba de lanzar Nank este año. A través del nuevo chip de reducción de ruido estándar Bluetooth 5.2, brinda una potencia informática más poderosa y realiza una reducción de ruido profunda comparable a los auriculares de mil yuanes; También es compatible con la reducción de ruido adaptativa dinámica, adapta automáticamente el modo de reducción de ruido correspondiente según el entorno y puede garantizar el efecto de reducción de ruido y mantener la comodidad en escenas complejas y cambiantes; Tiene reducción de ruido de llamada de micrófono dual, extrae la voz humana y el ruido ambiental mediante el análisis del sonido ambiental, y facilita la experiencia de llamada en un entorno ruidoso mediante el tratamiento de la voz humana clara y el ruido borroso; También puede realizar la muy popular función de doble permeabilidad en la actualidad. Un clic para activar la permeabilidad, de modo que pueda escuchar cada movimiento sin quitarse los auriculares; La forma del auricular está especialmente personalizada para el oído de todos en Asia para crear un auricular más adecuado para los asiáticos. El cuerpo liviano tan liviano como 4.1G sigue siendo cómodo durante mucho tiempo. Nanka A2 es muy adecuado para personas que tienen altos requisitos de reducción de ruido y esperan que el producto tenga funciones ricas. Espero poder ayudarte. Lo más destacado: cómodo de llevar, reducción de ruido personalizada La caja de carga adopta forma de guijarro, con un diseño simple, forma redonda y sujeción muy cómoda. Hay una ranura en la tapa de la caja. La tapa de la caja se puede abrir con una mano. La absorción magnética de la tapa de la caja es perfecta, con cierta sensación de amortiguación. No hay aflojamiento después de la apertura, y el sonido al cerrarse es nítido y no húmedo. La solución de Oppo enco free2 es muy fácil de usar. En primer lugar, la reducción de ruido personalizada mencionada anteriormente. Esta función mide el oído para personalizar la curva de reducción de ruido después de la medición de alta velocidad de acuerdo con el oído del usuario y luego lleva a cabo una reducción de ruido personalizada de acuerdo con estos datos de curva. Por lo tanto, su reducción de ruido no depende de sacrificar la comodidad de uso del usuario. El efecto de reducción de ruido se puede lograr sin apretarlo demasiado. Para el método de reducción de ruido oppo enco free2, tenemos que mencionar el chip de reducción de ruido de tres núcleos incorporado, que puede mejorar en gran medida la potencia informática de reducción de ruido y lograr un efecto de reducción de ruido más uniforme. Destacado: Reducción de ruido 3mic y algoritmo de voz inteligente One plus oneplus buses es una caja de carga en forma de guijarro con tratamiento de lijado de partículas pequeñas. La cantidad total de una oreja es solo 4.7G, y no habrá una sensación obvia de cuerpo extraño y fatiga después de un uso prolongado. El protocolo Bluetooth de los buses oneplus es 5.0, está equipado con una unidad de bobina móvil súper grande de 13,4 mm y es compatible con la codificación de análisis de audio AAC y SBC. Los autobuses Oneplus no solo tienen una excelente calidad de sonido, sino que también tienen una excelente experiencia de llamada. Gracias al algoritmo de voz inteligente de reducción de ruido de 3mic, el efecto de conversación es más claro cuando se usan auriculares. Incluso en nuestro entorno profundamente ruidoso, la otra parte puede escuchar cada palabra que decimos con claridad. La duración de la batería súper larga es lo más destacado de los autobuses oneplus. Cuando se usa solo el auricular, puede proporcionar hasta 7 horas de música o 4,3 horas de duración de la llamada, y se pueden obtener 30 horas de duración de la música con la caja del auricular. Destacado: función de reducción de ruido activa, tecnología híbrida de reducción de ruido activa dual Los lolipods Pro para cochecito agregan la función de reducción activa de ruido a los lolipods para cochecito y adoptan la tecnología híbrida dual de reducción activa de ruido, con una profundidad de reducción de ruido de 38dB. Stroller lolipods Pro también usa monitoreo de sonido ambiental para reducir el ruido, y se usa con la aplicación para ajustar el tamaño del sonido ambiental de forma independiente. En términos de experiencia de usuario, la función de monitoreo de sonido ambiental no es muy oportuna. Aunque la aplicación móvil se puede ajustar de forma independiente, es un inconveniente ajustarla cada vez. Stroller lolipods Pro está equipado con un diafragma compuesto de polímero, con una calidad de sonido clara, pero es ligeramente insuficiente en el rendimiento de los graves, y los graves no son muy potentes. El cochecito lolipods Pro se puede usar durante 5 horas sin reducción de ruido y 320 horas con el contenedor de carga; El tiempo de servicio de un solo auricular es de 4 horas y se puede usar durante 16 horas con el contenedor de carga. El cochecito lolipods Pro utiliza un puerto de carga rápida tipo C. Fqj
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