I know how long you must calculate seconds.
In fact, it was not long, 261 days, less than 9 months. This is also the time when I used Le2. At the time when LeTV 2 was listed, it was advertised as a super price-performance ratio and an ecosystem. Therefore, I had no brains to enter the pit. (When the first wave of panic buying, there is only a rose gold color, so you know, I often asked by others, what a rose gold rose gold)
Simply put the basic situation: X20 processor, 3G memory, 32G storage, 5.5 inch 1080P, 3000 mA, 16 million +800 million, generally so. Well, here's a summary of what I have used as a main engine since I started this time, and I hope to help you.
When it was purchased, it was the first wholesale sale, 1099 yuan. Now you can buy it everywhere, and there are a variety of colors.
[Le 2 mobile phone] music as the mobile phone 2, ultra high kill killer - music as the mall Le super mobile phone 2 (Le 2) mobile phone equipped with the world's first 10 nuclear processor, the world's first CDLA standard. Le 2 uses a 5.5-inch more sophisticated In-Cell screen to make the screen thinner, more transparent and brighter. Le 2 more amazing Internet speed, clearer voice calls, throughout the human design. Direct link The first is the experience of the mobile phone in one year:
1, the screen is broken in three days (sit down from the pocket, the edge of the ground, reimbursement of the external screen), and did not buy broken screen insurance, Taobao solve. Therefore, to buy a cell phone now pay special attention to whether it is Corning glass, after all, tempered film Shenma is only an aid.
2. When it takes about 3 months or so, the data line is not working (not related to the charging head), and the local after-sales direct replacement will be found.
3, the other is normal wear and tear.
Above
It can be seen that the edges have obvious signs of wear and tear, which was at the time of falling.
Close-up, because I still choose to use the jacket with a conservative, so the manager speculated that if streaking, edge wear should be more obvious.
The back of the machine has a less pronounced depression. I can't remember how to get it up. I'm not sure if it's time to leave the factory, but it doesn't affect the use at all.
Focus on the key issues, the use of the discovery function key in the use of the problem when there are two points: 1, the backlight is very obvious, the color is very light and not particularly delicate. 2. The three function keys as the touch type are difficult to recognize when they are pressed at the illustrated angle, and are particularly difficult to operate when they are placed on the vent bracket when driving. I don't know if this position itself has a problem or if it's not sensitive to the keys.
Mobile phone signal On the whole, LeTV's signal can still be, dual card status is also good, high-definition call function has been opened, but do not know whether China Telecom network support, did not feel there is any change.
See picture speak
It can be said that the life of LeTV 2 is very weak. It is normal to have two charges a day. There is no detailed test and record time. For example:
1, open the GPS, Baidu map, drip the driver side, automatic brightness, full bright screen navigation, from the order to the destination to about 20 minutes, the power out of about 10%.
2. Wifi is connected to standby at night and the power consumption drops by 5%-10%.
3, do not know what is the reason, the use of mobile phone power loss is not the law: sometimes playing a WeChat, look at the news of electricity on the unknowingly gone; sometimes the same intensity action, the power rate of decline is acceptable. So sometimes when I feel that the battery is going down quickly, I just restart it and it seems to be a lot better, so I doubt it is still a matter of system logic.
4, charging particularly fast, especially fast.
Connection class functionMainly includes wifi, Bluetooth, wireless display, infrared. There is nothing special on the whole (not particularly bad, nor worthy of praise).
The infrared function may be a feature of the LeEr mobile phone. It took a period of time and overall it is not bad. It can temporarily relieve the paralysis of the remote control. There are many supported models. However, as a main use, it is a bit too loaded, of course, is mainly spent electricity.
This feature is now being used by many manufacturers, and the dual applications of LeSpot 2 have the following problems in use (using WeChat as an example):
1, sometimes in the WeChat 1 interface, WeChat 2 to notify, click on the notification from the drop-down menu (normal should switch to the WeChat 2 interface), but did not respond.
2. I installed the auxiliary plug-in, and if I was using WeChat 2, I switched to the headline to read the news. Then I would switch to WeChat 1 instead of WeChat 2.
3. In the notification management, the WeChat notification settings are unified and cannot be set separately. In addition, if WeChat 2 does not stay in the background, it will not receive a notification.
other LeTV has been promoting itself as a complete ecosystem, which is also reflected in mobile phones. The most prominent feature is the Live Live button that cannot be removed from the homepage.
Other entrances such as LeTV Home, LeEco Games, LeEco Mall, LeTV, etc. can be closed. Overall, the impact on daily use is not significant.
to sum up With regard to the use of LeTV 2 (X620) for more than 8 months, the experience is summarized as follows:
1, the current use is still relatively smooth, no pressure on daily use performance, game performance is also good, of course, I do not have targeted testing.
2. There have not been any major failures, and there have been occasional falls. However, those students who want to go without a cover may be ready to change screen maintenance.
3, EUI system is currently viewed, use is still relatively easy to use, all the functional design is also very good.
4, fingerprint function is also good, speed, recognition rate and other aspects are more satisfactory.
5, the overall cost is still possible, but can feel that there is room for improvement in quality control, texture slightly worse.
Disadvantages: 1, the battery is not, life is very difficult and ups and downs. There is a fever when charging.
2. Occasionally there is a stall condition, especially when switching back to the main screen when playing the game, there will be 1-2 seconds of desktop loading.
3, does not support extended storage, does not support 3.5 headset, does not support NFC.
4, mobile phone storage calculation logic is not clear, for example, about 2 months after the first use, 29G free space self-test display is almost full, but I did not install any large-scale applications, did not import many photo movies. Later I recall that it was possible to store several high-definition movies on my mobile phone, but then I deleted it, but the capacity was not updated in time.
5, EUI update is relatively slow, that a good monthly update, the current look is already a serious bragging rhythm.
Overall, LeTV 2 mobile phone in the 1000 yuan or so the price can still be considered, the advantages and disadvantages are relatively clear, the so-called cost-effectiveness will not be rolling the rhythm of 2,000 yuan mobile phone, after all, hardware configuration is only one aspect, the phone texture is also very important.
If you change your phone again, you may not consider LeTV for a while. You will try to play 1+, Hammer, and Nubian Sima.
Cable Connectors I/O Connectors
What is an IO connector?
The use of fieldbus or industrial Ethernet in automation can provide many benefits: fast and reliable data transmission, reduce installation costs, easy to find faults and diagnose connected equipment, remote control functions and modularity. In addition, the corresponding network can be used to establish fieldbus connections to connect smart devices such as SPS systems, sensors, and regulators. Another advantage is its interchangeability. To get the above benefits in different standards and applications, flexible and economical connectors are necessary.
Flexible fieldbus connectors based on D-Sub interface technology are designated for common bus systems, such as CAN-Bus, Profibus and SafetyBUSp that are specified in the IP-20 range. This comprehensive and ever-expanding product portfolio includes types with switches (connectable terminal resistors) as well as pure nodes and pure terminals. The node (without terminating resistor) is used in the line, and the terminal (with terminating resistor) is used at the end of the line. As for the type of switch, it can be set to node or terminal. The incoming and outgoing bus is connected to the circuit board of the fieldbus connector, which means that even if the node connector is interrupted (T-), the bus will not be disturbed. Therefore, the device can be switched even when the bus is in operation. In order to find faults easily, if necessary, the type of terminal resistor that can be connected can be set from the node type to the terminal type. This will interrupt all subscribers behind these elements on the bus.
Different installation conditions cause various cable routing to have different requirements, so the fieldbus connector can choose horizontal or vertical cable outlets. Bus cables are often very rigid and require stable and reliable mechanical stress relief. For this reason, the connector's sturdy metal strain relief and reliable shield connection can establish a high-quality, low-resistance chassis from cable shield ground to shell ground. The overall cable diameter ranges from 4.5 to 8mm.
In terms of termination methods, in addition to screw terminal termination (suitable for stranded wires and solid wires) and insulation replacement technology (suitable for solid wires), the Profibus and CanBus series also provide cage spring clamp types. In this type, the connector's lockable cage spring clamp can ensure simple and quick termination. A wide range of cable cross-sections (0.14-0.5mm2) allow users to select the appropriate cable in any termination method.
Regardless of the presence or absence of the programming interface, the switch type Profibus has been redesigned to meet the mechanical installation requirements of the new SiemensS7 controller. The external profile of the newly designed Profibus with cable diameters ranging from 6 to 9 mm has been adjusted, all components are permanently preset, and replaceable cage spring clamps are integrated. In addition, Profibus also uses the latest generation of ERNI D-sub connectors.
The termination area is hinged with its lid, and its lid can be secured by using the center. This locking method will activate the strain relief of the cable and the connection of the shield at the same time. In order to meet specific needs, cable terminations are all proven and well-known technologies: insulation displacement (a fast termination option that does not require stripping the insulation of the wires), cage spring clamps, and screw terminal terminations. Different termination and strain relief options provide users with maximum freedom in connector termination. The standard Profibus type termination is a cage spring clamp with a cable diameter of 8mm. The Profibus type is also set to handle data signals with a transmission rate of up to 12MB/s.
For network connection
The most widely used connector system in the network is the 8-pin "RJ45" connector (8P8C). For this type of connection, the modular socket connector system has excellent transmission quality and is economical, and its termination method is welding or surface mount termination. In addition to single-port, modular and stackable ports, many product portfolios also include filter module sockets. Typical modular sockets are 4-, 6- or 8-pin types, providing unshielded or various shielding options. The size pattern and printed circuit board layout of the filter module socket are similar to the standard type. The signal can be transmitted to the front panel through the panel socket or panel coupler.
M8/M12 connectors are now recommended for almost all fieldbus specifications, and comply with the IP67 protection level according to the IEC61076-2-101/104 standard, traditionally used to connect sensors and brakes in automation technology: correction in this standard It is stated that the D-coded 4-pin connector used in industrial Ethernet applications has a higher level of protection. According to the EIA/TIA standard, the M8/M12 connector corresponds to the transmission technical conditions of the category 5 modular socket (RJ45). The use of D-code can prevent it from erroneous connection with A-code (used for sensor and brake wiring) and B-code (used for some field buses).
M8/M12 connectors did not have a type that could be used for printed circuit boards before, until 2005, the round M8/M12 connectors with surface mount terminations were born. Surface mount terminations contribute to the miniaturization of field devices. The sturdy pins allow it to pass through batch packaging and the corresponding feeding process using a vibrating bowl. Another packaging method is tape and reel packaging. The basic modular design concept creates connectors with various installation heights and different pin types. Based on user needs, the termination methods provided include surface mount, crimping or through-hole reflow technology, of which surface mount technology is the standard. The black insulator of the connector is made of high-temperature plastic, so there is no problem in all conventional surface mount soldering procedures.
In the past, the controller in the switchgear used the I/O card to drive the field equipment. Nowadays, industrial automation tends to be a distributed system. The field brakes and sensors are often connected to a passive or fieldbus performance I/o box. In order to provide solutions for multiple applications at the lowest cost, specific field devices require high-level modular flexible connector solutions. For this reason, the various printed circuit board types of circular M8/M12 connectors are supplemented by cable systems. Different model shapes, pin numbers, cable quality and length help to achieve cost-effective and customized automation solutions.
Cable Connectors I/O Connectors,Cable Connectors, I/O Connectors,wire-harness
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