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  • 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.

  • What is good for computer cooling

    The computer's CPU and other components generate heat during high-speed operation. Heat dissipation is actually a process of heat transfer. The purpose is to bring the heat generated by the CPU to other media and control the CPU temperature within a stable range. According to the environment in which we live, the heat of the CPU will eventually be dissipated into the air. This process is the heat dissipation of the computer.
    CPU heat dissipation is actually a heat transfer process, the purpose is to bring the heat generated by the CPU to other media, and control the CPU temperature within a stable range. According to the environment in which we live, the heat of the CPU will eventually be dissipated into the air. The heat transfer process between these is the role that the radiator will play.
    All radiators use heat conduction and convection as the main way to dissipate heat, and there is no product that can cool the chip by heat radiation as the main way. According to different means of heat conduction and heat convection, radiator products can be divided into active and passive ways. The active meaning is that energy that has nothing to do with the heating element participates in forced heat dissipation, such as fans, water pumps in liquid cooling, and compressors in phase change refrigeration. These heat dissipation methods are generally characterized by high efficiency, but they also require other energy sources. ’S assistance. On the contrary, the meaning of passive is easy to understand, that is, only relying on the self-emission of the heating element or heat sink to cool down.

  • The difference between fast charger and ordinary charger

    Fast charging refers to a charging method that can make the battery reach or close to a fully charged state within 1 to 5 hours. So the main difference between fast charging chargers and ordinary chargers is the charging time. With the continuous update and iteration of mobile phones, the charging time of the mobile phone has been fully charged from 10-15 hours before to 1-2 hours now because of the use of fast charging. A well-known mobile phone’s advertisement "Charge for 5 minutes, talk for 2 hours" is because it uses the fast charging function, charging in a short time can reach the power required for 2 hours of talk.

    There are two main directions for increasing the charging speed, one is to increase the voltage and the other is to increase the current. Increasing the voltage will increase the heat production during the charging process, accelerate battery aging and may bring safety hazards, so now the mainstream fast charging method is to increase the charging current. The charging currents of common mobile phone chargers are 0.5A, 1A, and 1.5A. , 2A, 2.5A, 3A, it is generally considered that chargers with a current exceeding 2A including 2A are fast charging chargers, and chargers below 2A are ordinary chargers.

  • Tire pressure gauge with external sensor

    Tire pressure gauge is a kind of pneumatic tire pressure gauge, which is composed of meter head, piston, meter body, ruler, main spring, etc. There is only one pressure measuring port on the meter head.

    There are different standard units for air pressure, generally there are 3 to 4 kinds. Just as the weight can be expressed in kilograms and kilograms, there are 3 to 4 types of indication units on the barometer, such as kg/cm2, bar, PSI and kpa. The conversion relationship between them is as follows: 1bar=1.02kg /cm2=102kpa=14.5PSI

    Align the notch of the measuring end of the tire pressure gauge with the tire valve and press tightly. At this time, the pointer of the tire pressure gauge deflects, and its indicating value is the inflation pressure of the tire, or the benchmark bar of the tire barometer is pushed out under the action of air pressure, and the value displayed on the benchmark bar is the inflation pressure of the tire.

  • Illuminated portable air pump electric tire inflator

    The automatic inflator is a cutting-edge technology product that can automatically adjust tire pressure through a microprocessor and pressure sensor. It can complete the inflation/deflation/inspection of tires at one time. It has the characteristics of high precision, speed, durability, simple operation, and brings better tires. protection. It completely replaces the manual barometer to eliminate errors and better protect the tires. microprocessor and a pressure sensor. It can complete the inflation/deflation/inspection of the tire at one time. It has high accuracy, fast speed, durability, simple operation, and brings better tires. protection of. It completely replaces manual barometers to eliminate errors and better protect tires.

    The tire pressure is returned to the sensor to automatically calculate whether the tire needs to be inflated or deflated, open the valve and perform work until the pressure reaches the correct tire pressure value. Just set the required pressure and connect the tires. When the required pressure is reached, it will automatically stop and emit a beep.to be inflated or deflated, open the valve, and perform work until the pressure reaches the correct tire pressure value. Just set the required pressure and connect the tires. When the required pressure is reached, it will automatically stop and emit a prompt sound.

    Portable 30 cylinder air pump electric tire inflator 12V car marine digital car air compressor with light

  • How to use the card reader

    Take WINXP system as an example
    First insert the memory card into the card reader. (Which position is inserted, everyone depends on the size of the card slot. The contact point can be determined anyway.) After connecting to the computer, it will be displayed in the lower right corner. New hardware (XP automatic installer), you will be prompted to use it after installation. The notification area in the lower right corner shows a small icon with a green arrow. Just put the things you want to install into the corresponding folder. 
    note:
    1  Do not plug or unplug the card reader when reading data.
    2 When uninstalling the card reader, be sure to close the page opened by the card reader, otherwise it may not be uninstalled.
    3  If you find that the page is closed, it still cannot be uninstalled. Open my computer and refresh it for a few times before uninstalling.
    Audio UHF card reader
    The card reader reads the corresponding device information in the electronic label
    The reading distance is 1 meter (different tags have different reading distances)
    Note: If the device is made of metal material, you should choose the anti-metal UHF electronic tag, but the distance of the reader to read the anti-metal electronic tag is shorter than that of the conventional UHF electronic tag.
    The card device is connected with the audio port (earplug hole) of the smart phone; directly transmits the collected data to the smart phone through the audio interface;
    The data collected by the card reader is transmitted to the smart phone through the audio port, and the smart phone is transmitted to the inspection system in real time through the CDMA1x network, and the inspection situation is tracked in real time and then processed.
    Advantages: Long card reading distance, easy to carry.
    Disadvantages: The card reader itself has no buttons, so you need to set a card reader button on your smart phone. For automatic card reading, you don’t need to set a card reader button.

  • What is a card reader

    A card reader is a card reading device used in a computer to read and write a multimedia card as a mobile storage device. Some card readers can only access one type of memory card, while others are all-in-one card readers. Some memory cards have integrated the function of a card reader. Users only need to insert the memory card into the USB socket, and the computer can access the data in the memory card in real time.
    A card reader is a device that reads data. It not only supports data reading, but also data writing, and is widely used in mobile data storage. A memory card can be inserted into the slot, and a port can be connected to the computer. After inserting a suitable memory card into the slot, connecting the port to the computer and installing the required driver, the computer treats the memory card as a removable memory, so that the memory card can be read and written through a card reader. Commonly used card readers are: USB type TF dedicated card reader, sim card reader, CRW-X type non-contact card reader.

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