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How long do soldered wires last?
Flux cored solder wire has a limited shelf life determined by the alloy used in the wire. For alloys containing more than 70% lead, the shelf life is two years from date of manufacture. Other alloys have a shelf life of three years from date of manufacture.
Why is my solder not stick to circuit board?
A classic reason solder won’t stick to something is because you’re not getting it hot enough. My interns come to me with this problem all the time. Make sure the tip of the iron is nice and shiny. Touch some solder on it, and it should melt almost instantly.
What is the effect of bad solder joints while soldering PCB?
Despite making the necessary electrical contact, the insufficient solder weakens the joint and increases susceptibility to cracking and failure. To resolve this error and ensure long-term reliability, simply reheat the joint and apply more solder until the joint is strong.
Can I use old solder?
Solder can definitely expire. This is because of the flux which can separate or in the case of solder paste dry out and become ineffective.
Can you burn a PCB with a soldering iron?
Likewise, cheap soldering irons that rely on higher temperatures to transfer enough heat instead of increased heat capacity at a lower temperature will more easily damage a circuit board, but any iron turned up hot enough will damage a circuit board.
What is acceptable ways of soldering wires directly to PCB?
There are eyelets also which are pressed into a PCB hole. Having said this, if your wires are smaller than #25 AWG and/or will not see any pulling stresses, you could even get away with soldering the wires directly to the board. Re: What is acceptable ways of soldering wires directly to PCB?
What causes solder to come back into the wave?
Causes of solder balling can include: The solder temperature being too high in the wave soldering machine. Solder falling back into the solder wave during separation and splashing back onto your board. The gasses released when the flux is heated causing solder liquid to spit back up onto your board.
What kind of wire do you use for solder?
BTW, the wire shown in the OP photo appear to be silver plated, PTFE insulated. This is often used in aerospace but is the worst for solder wicking and fracture near the ends. It’s an absolute requirement that these are physically restrained away from the solder connection.
What’s the best way to keep wires from falling off?
Agreed, the way to stop wires falling off is to avoid flex anywhere near the soldering point. Loom them and use a cable tie through 1 or 2 holes in the PCB to mechanically restrain them against movement. BTW, the wire shown in the OP photo appear to be silver plated, PTFE insulated.