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    With the advent of the network era, basically every household has installed routers, whether it is home chasing drama, or chatting, making friends and playing games, etc., which facilitate our daily Internet access. But I believe that most people in life will encounter the problem that the home network is slower and slower, or sometimes the network is disconnected, which is very annoying.
    However, this problem is not very big, as long as you make a few changes, in fact, the problem can be easily solved. Teach you a few tricks. Let's learn them quickly.

    1. Route placement location Router's own transmission rate has been set, so we should consider the location of router, the best way is to put the route in a relatively empty place, where there is no shield around, or hang high; do not put the route in the corner, easy to shield the signal!
    2. Prepare a piece of tin paper and a cardboard. First, wrap the cardboard completely with tin paper, then fold it in half and place it beside the router. If you want the signal in which direction of the home to be stronger, you can orient the folded opening in which direction.
    Yaojin Technology (Shenzhen) Co., Ltd. is a company which mainly produces wireless routers, set-top boxes, IP cameras and other products.

    Qualified SMT patch solder joints should have the following characteristics:
     
     
     
    1. Good appearance of solder joint of PCB plate
     
     
     
    (1) The solder joints on the PCB plate with good welding quality should be clean, smooth and metallic luster. If there is dirt on the surface of PCB and welding residue, it may corrode the lead, pad and printed circuit board of components. If moisture is absorbed, it may cause local short circuit or leakage accident.
     
     
     
    (2) There should be no burrs, voids and tin dragging on the surface of solder joints on PCB plate. This will not only affect the beauty of SMT patch solder joints, but also bring unexpected hazards, especially in high-voltage circuit may produce tip discharge, resulting in damage to electronic products.
     
     
     
    (3) There is no abnormal sample on the surface of solder joints on PCB plate, otherwise it may cause false soldering and false soldering of solder joints, leading to unreliability of SMT patch solder joints.
     
     
     
    (4) Overlap welding and bump welding are not allowed to avoid short-circuit events.
     
     
     
    (5) The amount of solder should be appropriate, not too much or too little. Smt patch solder joints have flat surface with half arch concave, smooth transition at the junction of solder joints, small contact angle, so that they can be qualified solder joints.
     
     
     
    2. The solder joints on PCB plate should have reliable electrical connection
     
     
     
    There are two main functions of solder joints in welding: one is to connect two or more components through solder; the other is to require good electrical characteristics. Therefore, it is not feasible for a solder joint to pass a certain current stably and reliably without enough connection area and stable structure. Tin bonding does not depend on pressure, but on the combination of layered and firmly connected alloy layer to achieve the purpose of electrical layer connection. If only the filler metal is overlayed on the surface of the welding components to form virtual welding, or only a small part of the alloy layer, then it may not be easy to find the solder joint is not firm in the test and initial work, but with the change of working conditions of the time, the contact layer oxidation may occur after the de-soldering phenomenon, the circuit will be interrupted or simply do not work. At this time, through the eyes to observe the appearance of the welded circuit board, the circuit is still connected, that is, it is not easy to check out with the eyes, which is the most headache in the use of electronic equipment. Therefore, solder joints must have reliable electrical connections.
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