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I found this copper thing in my soldering kit, but as its in Chinese I don’t know what it is.

What is it? It doesn’t look like that thing for removing solder because the wire is very thin, unlike the other thing which looks like a wick of copper. This looks just like plain copper wire. What is it, and what is it used for?

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    \$\begingroup\$ Fixing mistakes? \$\endgroup\$
    – DKNguyen
    Mar 14, 2020 at 4:05
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    \$\begingroup\$ You use it for fixing stuff? Like lifted traces, wrong traces, etc. \$\endgroup\$
    – DKNguyen
    Mar 14, 2020 at 4:07
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    \$\begingroup\$ Almost looks like wire wrap, for making your own transformers. It can also be used for fine repairs like soldering to pins on LQFP chips. \$\endgroup\$
    – Ron Beyer
    Mar 14, 2020 at 4:16
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    \$\begingroup\$ it is not a "copper thing", it is copper wire ... use it anywhere you would use copper wire \$\endgroup\$
    – jsotola
    Mar 14, 2020 at 4:22
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    \$\begingroup\$ maybe you purchased a hobby soldering iron kit that is meant for making jewellry \$\endgroup\$
    – jsotola
    Mar 14, 2020 at 4:24

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Looks like general purpose lacquer-insulated (漆) copper wire. You should be able to solder through the coating without stripping it (it says no need for scraping 不用刮), but I'm not sure if it's sturdy enough (insulation-wise) for use in coils. You can try bending it around and look at it under a microscope or magnifier.

0.1mm is equivalent to AWG 38, so pretty fine. It might be nice for making dead bug circuits, a bit on the light side for DIPs (AWG 30 is better for that) but okay for fine-pitch SMT parts.

Pretty handy, really, sometimes enameled wire is very expensive in small lots.

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  • \$\begingroup\$ Thanks for your answer! Any idea why it’s included in the soldering kit? \$\endgroup\$ Mar 14, 2020 at 8:48
  • \$\begingroup\$ Sort of a little gift, I imagine. \$\endgroup\$ Mar 14, 2020 at 8:49
  • \$\begingroup\$ What do you use it for ? \$\endgroup\$ Mar 14, 2020 at 9:02
  • \$\begingroup\$ It's insulated wire you can solder to. Use it to make electrical connections mainly. \$\endgroup\$ Mar 14, 2020 at 9:03
  • \$\begingroup\$ I see! Very interesting. Thanks for your answer. Also, I looked at your profile, and though unrelated - was wondering if I could ask your opinion. I know close to nothing about electronics (except for what I learned until Grade12 many years ago.) Can I seriously learn electronics to be a competent EE by studying Art of Electronics and working on hobby projects ? Also what is your opinion on 3rd edition vs 2nd ? \$\endgroup\$ Mar 14, 2020 at 9:04

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