Home theater network () from VCD to DVD, to Blu-ray DVD, the clarity of video signals is also increasing from 480P, 720P to 1080P, 4K or even 8K, regardless of Blu-ray DVD, HD projection In order to achieve full HD enjoyment, it is the best choice to use HDMI interface for data transmission. What HDMI cables are currently available on the market, and how should consumers choose?
Advantages of HDMI cable
Color difference, VGA, BNC, DVI and other interfaces can also support the transmission of high-definition signals. Why should HDMI be preferred? This starts with the characteristics of HDMI cable. "Common Home Theater Signal Line Classification and Connection Usage"
As we all know, the full name of HDMI is HighDefinitionMultimedia (High Definition Multimedia Interface), which was established in April 2002 by HDMI organizations established by seven companies including Hitachi, Panasonic, Philips, SiliconImage, Sony, Thomson and Toshiba. For digital video/audio transmission standards. As the only interface that fully supports industrial, uncompressed, all-digital video and audio, HDMI can be used in applications such as set-top boxes, DVD players, monitors, digital TVs, projectors, computers, camcorders and digital cameras.
A 1080p video and an 8-channel audio signal require less than 4GB/s. The HDMI interface can provide up to 5Gbps data transmission bandwidth, and can transmit uncompressed audio signals and high-resolution video signals up to 15 meters. Sufficient to cope with a 1080p video and an 8-channel audio signal at the same time. At the same time, it is not necessary to perform digital/analog or analog/digital conversion before signal transmission, which can ensure the highest quality video signal transmission. The advantage of using HDMI is that only one HDMI cable is needed, so that audio and video signals can be transmitted at the same time, instead of requiring multiple wires to be connected, and higher audio can be achieved by digital/analog or analog/digital conversion. And video transmission quality. For consumers, HDMI technology not only provides clear picture quality, but also greatly simplifies the installation of home theater systems due to the same cable for audio/video.
HDMI purchase experience
HDMI is a new type of digital interface that is being popularized. The price of general domestic HDMI cable is in the range of tens of yuan to several hundred yuan, and the price of HDMI cable of the same specification of many well-known foreign brands is as high as several hundred yuan or even several. Thousands of yuan, such as a brand's high-end HDMI line 1 meter line offer is 900 yuan, 5 meters line quoted 1,500 yuan.
Although the wire core material, core cross-section size, shield quality, and interface quality of the HDMI cable will cause more or less interference to the HDMI signal transmission, the actual use effect indicates that due to the digital signal transmission of HDMI, as long as it is not a poor quality of cutting corners There is no difference in the transmission effect between cable, ordinary domestic cable and high-priced foreign brand cable. It is not that some foreign brand cables are so fascinating in the publicity materials. Obviously, thousands of dollars of HDMI cable has lost its significance in the consumer market, unless you are a deep enthusiast or burnt money, generally projection theater users should choose such cables when purchasing such cables.
Therefore, when choosing HDMI cable, you should still choose according to your own economic strength and machine grade. The enthusiastic players with higher economy can choose the mid-range HDMI cable of Belkin, Monster and other brands. These lines work well. Generally, it adopts high-conductivity oxygen-free copper as conductor, and has multiple layers of shielding layer. The joint is plated with 24K thick gold and is equipped with a filter magnetic ring. The anti-interference ability is good. Of course, when choosing such cables, you should purchase them at the store as much as possible to avoid buying fakes. In this way, 50% of the products in the currency market are fakes.
The price difference between different brands of HDMI cable is large, and the actual use effect is the first factor to judge the merits of cable, not the brand.
Mainstream theater users or general players can choose domestic brands of HDMI cables, such as Kaiboer, Akihabara, Yinyewang, Fuji and other brands of cables, which have fewer fakes. These lines are also covered with multiple layers of shielded mesh to ensure The signal is pure, with electroplated gold-plated port, silver-copper alloy core wire, the actual transmission performance within 5-15 meters and foreign brand products will not have any difference.
In the specific wire selection, the selected line should not be too hard or too soft, and the line with moderate thickness is the best. Of course, it is best to test the selected wire in the field to see how the actual effect is king. If you buy a line without the on-site test conditions, you must talk about the three-pack problem, and talk about the free package change period. If you take the test machine, you will find that the wire transmission display is not good, the display effect is unstable, and the contrast is not good. Problems such as more background noise can be unconditionally returned/changed.
HDMI cable recommended
Having said that, what are the specific HDMI cables available on the market? The following authors recommend several models for you:
Belkin HDMI digital multimedia cable AV52300zh08 (HDMI-HDMI), with 24K gold-plated plug, excellent conductivity and corrosion resistance; high-precision nitrogen-filled polyethylene insulation covering copper wire, ensuring clearer and more accurate image quality And more natural sound quality; purity up to 99.9997% oxygen-free pure copper wire with PCOCC process special processing, silver-plated copper wire, providing the best high-frequency response, to provide you with the best audio and video experience; 4 layers of shielding, completely isolated outside Signal interference: 3 layers of 100% covered aluminum foil and polyester film shielding layer, fully isolate the clutter signal interference; high proportion covers the tinned copper mesh shielding layer to further isolate the clutter signal interference. The reference price of its one-meter line is about 100 yuan.
Use foreign brands of cables to be careful not to buy fakes.
The American MONSTER HD HDMI line is ranked first in HDMI, and the M1000DAV is the best HDMI in the monster. The wire is made of silver-plated conductor to maximize the contrast and brightness of the picture. The patented nitrogen-filled dielectric provides maximum flat transmission characteristics and ultra-low attenuation characteristics, resulting in outstanding high resolution over long transmission distances. Three-layer shielding measures are fully resistant to RFI/EMI signals. The resulting interference. The highest definition and true reproduction of color. Bright and transparent, the picture is pure and dye-free. The wire is 100% HDMI version 1.3, perfect for 1080P. The 2 meter line is quoted at 160-250 yuan.
Kaiboer HDMI cable is worthy of attention
KAIBOER HDMI wire is a brand that attracts fans with excellent intrinsic quality, outstanding overall style and high cost performance. The wire diameter is thicker and larger than the average wire on the market. No. 2, and the outer wire mesh is anti-static and protects the wire. It adopts thickened electroplated gold-plated port, silver-copper alloy core wire, three layers of shielding inside, and is covered with excellent performance and very beautiful shielding net to ensure the signal. Pure, the inner core wire is welded on the joint with pure silver, and there is a reinforcement device. There is no problem in the laboratory simulation test 100,000 times. The measured effect is exactly the same as several international famous brands. The picture has tension, high brightness, very clean and soft. The price of the 3 meter line is 280 yuan, the price of the 5 meter line is 340 yuan, the price of the 10 meter line is 540 yuan, and the price of the 15 meter line is 790 yuan, which is much cheaper than the cable of the same length of foreign brands.
Electric dc motors were the first type widely used, since they could be powered from existing direct-current lighting power distribution systems. A electric Dc Motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small electric dc motor are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight motor used for portable power tools and appliances. Larger electric dc motor are used in propulsion of electric vehicles, elevator and hoists, or in drives for steel rolling mills.
Areas of application: the Electric Dc Motor rotor part of the armature iron core, armature, commutator, such as equipment, electric dc motor is suitable for most electronic products, such as electric screwdriver, laser, smart home, gas valve, etc
Applications:
Method of use: the best stable in horizontal plane, installed on theelectric dc motor output shaft parts, cannot use a hammer to knock, knock prone to press into the electric dc motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
Electric dc motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a electric dc motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
Electric dc motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of geared motors is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.
â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
Electric Dc Motor
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