A classmate's bluetooth keyboard suddenly exploded while charging. I saw my fat brother repairing the keyboard a few days ago (the time when the car overturned), so I asked my fat brother to help him repair it. . There is one thing to say, before repairing, it is generally necessary to listen to the operation before the damage. This allows the location of damage to be identified. The fault description is that when it is charging, it explodes all of a sudden. Charging and charging, there is a high probability of damage to the power management IC, a small probability of damage to the lithium battery, and a small probability of damage to other components. You can know it when you disassemble it. Without further ado, the picture above. You can see that the PCB below has burnt marks. . . The chip in this place has been burned through. There is a high probability that the charging ic will explode, probably because a fast charger is used. . . It's outrageous. . . There are two solder joints on the pcb, one vbat and one gnd, VBAT should be the abbreviation of VBATTERY, the battery terminal, and GND is the ground. Use a DC power supply to add electricity to see if there is any damage elsewhere. To be on the safe side, start with 2V and add to 3.5V. The power supply used for powering up should have been seen by engineering friends doing experiments. . Schematic diagram of power-on. After the power is added to 3.1V, the light is on, and the visual inspection is that the power management IC is damaged. But everything else is intact, and the Bluetooth keyboard can be used normally, but the charging IC is broken, and there is no substitute in hand, what should I do? ? ? After communication, the students asked that it only needs to meet the daily use functions. Just let this bluetooth keyboard can be charged and charged. Don't be afraid, don't be afraid, the engineering fat brother is fearless. After analysis, the lithium battery is 3.7V, and there is a protection board inside. It can be directly connected to the power supply for charging, the voltage is set to 3.6V, and the current is charged to 50ma, which is considered to be fully charged. Then just make a mother-child terminal between the battery and the board, and the terminal is drawn out. When charging is required, disconnect the terminal and power on to charge the lithium battery. let's move! ! ! The terminal on the lithium battery, the male terminal. Female terminals on the board. Open the shell with a soldering iron. It's not pretty, but it works. Combine! ! Secure the wires with electrical tape. Assemble, the sides look like this. It's ugly, but it doesn't affect functionality. In the front view, the switch button was burned and deformed, so it was thrown away. long tail! ! There is one thing to say, the fat brother's technology is not bad, the car rollover is only a small probability event, thank you for watching and reading! ! !

A while back, I made the decision to switch from wired keyboards to wireless for the added convenience. My experience with the Maccong k980 keyboard had been g...

Now many of our friends like to play games, so we must have a good equipment to play games, such as a keyboard, so how should we choose a keyboard? First of all, if the friends who are still in college live in the dormitory, try not to choose the green axis, because it is really too noisy and the sound is very loud, which greatly affects the rest or reading of the roommates. Secondly, it is best to choose a backlight with a keyboard, so that you will not press the wrong key because you cannot see it at night. Another problem is that considering the length of the table, you can choose an 87 keyboard. In this way, you can save a space for the mouse, which is also a better operation. Of course, if the table is big enough, friends can ignore it. Secondly, choose the quality of the keyboard and try to choose a keyboard of a big brand, because a good keyboard can allow you to use it for a long time, and sensitivity is also very important when you play games. For those who care more about the weight of the keyboard, the keyboard is generally lighter now.

It is not the best, but it is definitely the most practical for me. Just like some products can’t meet the needs of most people, but they must be the most suitable. If you want to use a keyboard⌨️ that costs thousands of dollars to hang and play, it’s more or less a bit like Tian Ji’s horse racing and self-deprecation. Just to say a little bit, when I was choosing before, I saw the keyboard tapping sound mentioned by many people. To be honest, when we work, we always wear noise-canceling headphones to create an immersive working environment of our own. The keyboard clicks don't have any appeal to me at all, or I can't hear them at all. Just like me, a person who rides an electric car ?, I can't feel the excitement brought by the roar of the motorcycle ?️. There are also those who create their own exclusive, DIY, color matching, stickers, various materials, etc., to be honest, this thing is my work to make money, if it is not because of work to make money, I don’t even want to own it, it’s just It’s just a matter of improving the comfort of work with limited ability. My happiness is definitely not obtained by upgrading work equipment?️. So what kind of help did it provide to my work? First of all, it is the connection of multiple devices. Usually, if you are used to typing on a keyboard, the keyboard that comes with the phone will feel very small. In many cases, not all apps on the phone can be logged in with a computer, so it becomes a keyboard⌨️ Typing, the three devices are seamlessly connected, and you can switch devices as quickly as possible. Speaking of which, we are not doing work ?️ like a secret agent, and we need to switch in seconds. At that time, I felt that it was too fast, and I was a little uncomfortable with it. There are also many function keys, which can not only control the computer ?, but also the mobile phone ?, and can be operated without touching the mobile phone. To be honest, it is really very convenient. I always thought that these functions ?️ were not suitable for mobile phones. Think it smells so good. The support for multiple systems can be regarded as a particularly eye-catching highlight. When I bought it, I still used the win system, and my mobile phone was Apple. At that time, I thought that if it didn’t work, I would return it. It was only after using it that I found it was really delicious. , and later all changed to the Apple system. I can’t remember the days at that time, but I only remember that the operating modes of the two systems seem to be a little different. There is also non-slip silicone on the bottom, which can stabilize the position on the table very well, and even a little slope can be easily controlled. Basically, I can see it, so I will say some conclusions: I use it basically for the input on the mobile phone, for some copywriting editing, but for the practicality of the computer, I use my personal distance, sometimes I need the number input of the small keyboard, this model does not have it, why can I use it? Tolerance is because digital input is rarely a state for me, and it can almost be ignored. If your application scenario is computer>mobile phone, you need to think about it before buying. There is also multi-device control. I am nothing more than a computer➕mobile phone, and the operating space is limited. I don’t need to switch back and forth with so many devices. Our work intensity is not so high, and I almost completely ignore some minor problems such as delays. Also, its price is really cheap. I saw ?️ people complaining about the cheap feeling brought by its plastic material. To be honest, this is just a tool for work. If you want to highlight the rich and noble atmosphere, it is better to inlay yourself Gold teeth, that stand out more. Take my keyboard as an example. This is the only place I can show off. Even my family members don’t think this thing is powerful at all. People are not connected, even the family members under the same roof. Finally, let me tell you a link, the upgrade of tools at work does not make me feel happy in life, and investing in work, I feel that I have surpassed 90% of the migrant workers. The money spent ? really hurts me.

Today’s mice are exceptional pieces of hardware. They are hardy, practical, and can be used on almost any surface.