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Monthly Archives: September 2020

  • How is the sound quality of the headset

    The noise reduction function, because of the design of a larger over-ear earmuffs, also allows this headset to obtain a good passive noise reduction function, using AMS noise reduction chip, which can realize the active noise reduction function. Wearing, using a wrap-around design, the protein leather earmuffs are wrapped with breathable sponge, and the four-dimensional micro-suspended earmuffs design makes the wearing experience more balanced.

    The issue of sound quality is a very professional issue. In fact, most people don't understand it, especially on some earphones that are not very different. Non-professionals can't hear it. Ordinary people just listen to music and play games normally with headphones, and don't have too high requirements for sound quality. The sound quality is clear, the resolution is better, and the details are richer. According to the current headset market, high-quality headsets are more expensive in the market, especially some brands of headsets are updated relatively quickly. If you don’t pursue perfection in all aspects, it is not recommended to make a new one. Buy, except of course local tyrant players. Of course, you can also buy cost-effective products at lower prices, especially for some wooden ears.

  • What are the advantages of headphones

    Due to the design and wearing relationship of the headset, it is better to protect the ears than the in-ear headset, and it is more comfortable to wear. Moreover, the atmosphere and spatial positioning are better than those of in-ear headphones. The sound quality of the headset is powerful and has an immersive effect. The resolution of the headset is better, the details are rich, and the tiny signals can be reproduced clearly. Good sound field description ability, wide sound field, accurate and stable instrument positioning, enough information in the sound field, no feeling of hollowness. There is no obvious compression and fatigue in the dynamic, with a good sense of speed, no distortion or little distortion at high volume. Because the headset is an over-ear type, it can isolate noise to a certain extent, and it is less difficult to achieve noise reduction. For many people with noise reduction needs, the headset is the best cost-effective choice, wireless and The in-ear type needs more money to achieve high-quality noise reduction than the headset.

  • The purpose of the card reader

    The card reader is produced with the digital camera, but its use is no longer limited to the digital camera, but has expanded to more fields.
    The card reader, as the name suggests, is a device for reading data, but it not only supports data reading but also data writing. The initial design idea is mainly to make up for the defects of digital camera data output. Since the USB interface was not popular in the early days, the output ports of digital cameras were all connected to the serial port of the computer. Since the data transmission speed of the serial port was very low, it would take a lot of waiting time if these data were copied to the hard disk. , Therefore, the card reader came into being. With the development of digital products such as MP3 and PDA, the development of card readers has been strongly promoted. The standard 256M or 512M flash memory of MP3 is obviously not enough to meet our needs, so adding 1G or higher flash memory has become our standard configuration, but if we want to copy MP3 songs to the flash memory, we can only play through MP3. At this time, we need a dedicated connection, driver and software to complete, so the portability of MP3 players is much worse, and if we use a card reader at this time, there is no need for MP3 playback. With the intervention of the device, you can directly store MP3 songs on the flash memory, so that MP3 becomes more convenient to use.

  • How to charge mobile phone battery

    Mobile phone batteries are energy storage tools that provide power to mobile phones. Mobile phone batteries generally use lithium batteries and nickel-metal hydride batteries. Mobile phone batteries generally consist of three parts: a battery cell, a protection circuit, and a shell. "MAh" is the unit of battery capacity

    Regarding the "activation" problem of lithium batteries, many claims are: the charging time must exceed 12 hours, and full charge and discharge are repeated three times to activate the battery. This statement of "the first three charges must be charged for more than 12 hours" is for rechargeable batteries in the 1990s. The nickel-cadmium batteries at that time had a memory effect and needed to be fully charged to ensure battery capacity. The mobile phone uses a lithium ion battery, which has no memory effect. Generally, it can be fully charged in 2-3 hours, which is sufficient. If the first three charging and discharging of the new battery can really reach 12 hours or more, it will cause great damage to the battery, and may cause the battery to swell or even burn. Fortunately, both the mobile phone and the charger have protection circuits. When it is charged to 100%, it will automatically power off, and it will not continue to charge when plugged into the charger. However, it is better to unplug the charger at this time to prevent the charger's protection circuit from overcharging in case a problem occurs, causing serious damage to the battery materials and affecting the capacity and life of the battery. Generally, the charging method described in the mobile phone manual is the standard charging method suitable for the mobile phone.

  • What to do after using the camera

    Remove parts
    Remove the tape and battery from the camera before storing the camera after use. As long as the video tape is loaded into the camera, the tape will be led out by the camera's strap system, and the video recording part of the camera is in working condition. If the tape is not taken out before storage, after a long period of time, the tape that is pulled out will loosen and fall off the traction mechanism, which may cause the tie and cause mechanical failure the next time it is used. When storing video tapes, keep them away from heaters and other heat sources, not too close to strong magnetic fields, and store them upright in the original packaging box. If the battery is installed on the camera for a long time, it will consume power even if the power switch is turned off. Excessive battery discharge will affect its service life. If the battery is not used for a long time, charge and discharge it every six months.

    Pay attention to moisture
    Put the camera in a sealed plastic bag before entering the room, and take it out when the standby device is at the same temperature as the room. The head of the camera is a vulnerable part, and its life span is not only related to the material of the head and the quality of the tape used, but also closely related to the humidity of the air in the environment. The higher the air humidity, the faster the video head wears out. Generally, the life of the head is the longest when the relative humidity is 40%. Therefore, the humidity of the environment where the camera is used and stored is most suitable to be kept at about 40%. Remove from the camera. As long as the video tape is loaded into the camera, the tape will be led out by the camera's strap system, and the video recording part of the camera is in working condition. If the tape is not taken out before storage, after a long period of time, the tape that is pulled out will loosen and fall off the traction mechanism, which may cause the tie and cause mechanical failure the next time it is used. When storing video tapes, keep them away from heaters and other heat sources, not too close to strong magnetic fields, and store them upright in the original packaging box. If the battery is installed on the camera for a long time, it will consume power even if the power switch is turned off. Excessive battery discharge will affect its service life. If the battery is not used for a long time, charge and discharge it every six months.

    Stay away from the magnetic field
    Since the camera part uses the photoelectric conversion principle and the video part uses the electromagnetic conversion principle, the strong magnetic field and the strong electric field will affect the normal performance of its performance. In severe cases, it will cause image distortion and sound distortion. For this reason, the camera should be kept away from strong magnetic objects or objects capable of strong electromagnetic induction, such as televisions, speakers, induction cookers, transformers, etc., during work and storage.

  • What to pay attention to when using the camera

    Don't get caught in the rain

    If you have to use it outdoors on rainy days due to shooting needs, you must take measures to protect the camera from rain, such as covering the camera with a plastic bag and bringing an umbrella. Once the camera accidentally enters the water, remove the battery immediately. The faster the better, do not turn on the camera while testing whether the camera can still work, because most of the water-ingressing machinery is damaged because of this operation. If the water is very clean and the amount is not large, you only need to place the camera in a dry, ventilated, dust-free place for 2-3 days before turning it on.

    Dustproof is necessary

    Dust falling on the lens will affect the clarity of the camera, and will increase the inertia of the adjustment switches and knobs. The magnetic head and tape move at relatively high speed during shooting. The dust on the magnetic head or tape will damage the head like sand And tape. In order to prevent dust from entering the camera and polluting the movement, drum, viewfinder, liquid crystal screen, and lens, effective dust-proof measures must be taken. For example, when shooting in a sandy environment, cover the camera with a transparent plastic bag, or make a simple dust-proof belt to cover the body. When you carry the camera, you should put the camera in a special bag or box. When you stop shooting, you should always cover the lens cover and install a UV lens in front of the lens. It can effectively prevent dust and raindrops from entering the lens.

    Pay attention to shock

    When carrying and using the camera, pay attention to shock and drop resistance. Take out the battery tape when traveling to avoid violent vibration of the camera, such as putting the camera in the rear luggage compartment of a car. Severe vibrations and external impacts will damage or even deform camera parts. Do not use a tripod to take selfies on uneven ground or crowded places to prevent the corner stand from being knocked down by tourists, and try not to let children operate the camera.

  • How about the wireless charger

    With the continuous improvement of the requirements for power supply quality, safety, reliability, convenience, immediacy, special occasions, and special geographical environment, the contact-type power transmission method is increasingly unable to meet actual needs.

    The wireless charger is a device that uses the principle of electromagnetic induction for charging. Its principle is similar to that of a transformer. By placing a coil at the transmitting and receiving ends, the transmitting end coil sends an electromagnetic signal to the outside under the action of power, and the receiving end coil receives the electromagnetic signal. Signal and convert electromagnetic signal into electric current, so as to achieve the purpose of wireless charging. Wireless charging technology is a special way of power supply. It does not require a power cord, relies on electromagnetic wave propagation, and then converts electromagnetic wave energy into electrical energy, and finally realizes wireless charging.

    New electronic products, especially portable electronic products such as digital cameras, mobile phones, and tablet computers, are being used more and more in people's work and life, and their matching chargers also use traditional wired chargers. However, the compatibility and versatility of wired chargers are relatively poor, and it is inconvenient for users to carry and charge. At the same time, post-disposal treatment increases environmental pollution. Therefore, it is extremely urgent to provide users with more reliable, convenient, convenient and timely charging equipment. The development of wireless technology makes it possible to transmit radio power, and the research and development of wireless chargers will also meet user requirements.
    There will be three main forms of battery charging in the future: visual charging, smart charging and wireless charging.

  • Sports unlimited bluetooth headset, headphone

    Headphones are not inserted into the ear canal and are different from earphones. It is composed of two parts, a signal transmitter and a headset with a signal receiving and amplifying device. The transmitter is connected to the signal source. You can also connect a pre-stage or headphone amplifier before the transmitter to improve the sound quality and adjust the tone.

    Wireless headsets generally refer to headset systems that transmit signals by infrared rays, and cordless headsets refer to headset systems that use radio waves to transmit signals.

    The biggest advantage of the in-ear type is that it saves electricity, and ordinary mp3 can be driven, and then it can avoid environmental noise. After all, the ears are blocked while listening to music. The main reason for the poor bass of the headset is that the sound unit reduces the cost, and some headsets have strong bass, but need computer CD and other equipment to drive, and the mp3 drive does not have the bass effect.

  • Camera battery saving tips

    The battery is the key to the digital camera. I am afraid that the importance is second only to the lens. If you want to shoot smoothly, a strong battery is essential for subsequent power supply. However, even the best battery will lose its strong power without maintenance. Therefore, the maintenance of the battery is very important.

    If you do not use the camera for a long time, you should remove the battery and store it in a dry and cool environment. Because if the battery is left in the camera for a long time, it will cause leakage, and in serious cases, it may cause damage to some circuits.

    Many people turn off the camera to save power when not using it. In fact, the power consumption is faster when the camera is turned on than in the standby state. Therefore, when we pause shooting, we still keep the camera in the standby state.

    When the camera is in a low temperature environment, it usually consumes more power to maintain operation, and the battery performance is often reduced. If shooting in a low temperature environment, we can pay attention to the temperature of the battery. In this case, we can take the camera battery out and put it in our pocket to keep the battery at a normal temperature. Can add a spare camera battery.

  • How to choose an external hard drive

    Backing up the most important files to a cloud provider is great, but if your internet goes down, backups are also readily available. This is where external drives come in. They even provide a good way to expand the storage of low-end laptops and portable devices.

    It can be said that the most important specification to consider when buying an external hard drive is storage space. It is not appropriate to buy high-speed equipment with encryption and remote access functions if it is not enough to actually store the information you need. In other words, you also don't want to pay for a drive through your nose that you will never get close to filling, so what is your goal? It depends on what you want to use it for.

    The operating speed of the drive has two main factors: the storage technology and the connectors used. Although some drives are faster than others (and if you want cutting-edge speed, make sure to check the option's comments), in general, solid state drives (SSD) can process data faster than hard disk drives (HDD). External SSDs tend to be more expensive than their HDDs and usually have less storage capacity. You don't have to own one of them, because there are bigger SSDs there, but you have to pay extra.

    Another reason to consider SSDs instead of HDDs is durability. Although modern external drives are usually equipped with a sturdy case to protect them from damage, if they are hit or dropped, the two technologies have very different physical makeup. SSD has no moving parts, making it more durable than traditional hard drives and reducing damage. Although no one plans to give up their external drives, SSDs can provide more protection to prevent such unfortunate incidents if you think it is possible.

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