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I am going to try and make my own mechanical USB cable. For soldering the wires to the usb plug, what is the recommended Solder tip type/size and also what is a good temp to use?

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    \$\begingroup\$ Datasheet for the part? \$\endgroup\$ Apr 23, 2020 at 2:27
  • \$\begingroup\$ Added a pic of the do it yourself USB-C plug \$\endgroup\$
    – dman
    Apr 23, 2020 at 2:31

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I would use a fine tip, very thin.
Also some very thin solder. The tip & the solder should be about the size of those pads or less. I would also set my soldering gun to about 700°F ( ≈ 370°C) (Lead solder, not RoHS)

First touch the tip to the pad, then touch the solder. This will leave a little blob of solder on the pad.

Next using multi-strand wire of AWG26 or 28, I would remove about 3mm of insulation, and tin the wire with more solder. Not a big blob here, just wet it.

Last, place the wire on the pad, then place the soldering tip on the wire. Push down very lightly. After a second or two, the solder blob will melt, the wire will move down. Remove the soldering tip. Hold the wire steady for about 3 second, and you're done :)

I would then look at it REALLY CLOSE with a magnifying lens or some such, to see the quality of my work.

Last - After I'd tested it, I would cover the entire area with hot melt glue, so I don't break the wires later or accidentally rip off the pads.

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  • \$\begingroup\$ What strength magnifying lens should I get? \$\endgroup\$
    – dman
    Apr 23, 2020 at 3:27
  • \$\begingroup\$ Also, would that be a T18-D08 - 0.8 x 14.5mm? I am looking at Hakko T18 Series Chisel Pack with T18-D08/D12/D24/D32/S3 Tips Model (Japan Import) \$\endgroup\$
    – dman
    Apr 23, 2020 at 3:31
  • \$\begingroup\$ I have a benchtop microscope. But a jewelers loop is a great option - I have a clip on that's especially convenient with my glasses. Such as: i.ebayimg.com/images/g/ffoAAOSwBY5d3FEa/s-l1600.jpg Or i.ebayimg.com/images/g/R6wAAOSwqIleE-bZ/s-l500.jpg For tips, 0.8mm is pretty small, should work. If fine solder is hard for you to source, I could send you some. I have a 1 pound spool. That'll last me the rest of my life! LOL I can spare a few feet of it ;) Send me email with your address if you're interested. \$\endgroup\$
    – Kyle B
    Apr 23, 2020 at 4:13

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