I am trying to solder a continuous line with a non-lead soldering wire but I ended like this. Now it's not conducting but there is no gaps between anywhere. How can I fix this?
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3\$\begingroup\$ Not sure which places you really intended to be continuous, but I see lots of places in long lines that have gaps. \$\endgroup\$– JRECommented Oct 20, 2019 at 15:17
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2\$\begingroup\$ Possible duplicate of Lead Free Soldering and bad looking joints The best answer there was "get some proper lead/tin solder!" \$\endgroup\$– Peter JenningsCommented Oct 20, 2019 at 15:23
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2\$\begingroup\$ Lead free solder conducts just fine. You just have to actually connect all the points. It is probably simpler to use a short piece of wire rather than trying to solder all the pads in a row together. \$\endgroup\$– JRECommented Oct 20, 2019 at 15:28
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3\$\begingroup\$ solder a bare wire over the pads you want to connect, rather than trying to drag a solder bead to make the connection. \$\endgroup\$– Peter BennettCommented Oct 20, 2019 at 15:33
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2\$\begingroup\$ Honestly, this looks like you really need to practice some more soldering with this matarial, and especially the large blobs in the top right suggest you've got a problem actually wetting the contacts. There's nothing wrong with the lead-free solder, your handiwork is just not good enough (yet)! \$\endgroup\$– Marcus MüllerCommented Oct 20, 2019 at 16:22
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2 Answers
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Don't try to make circuits with all solder bridges. Lay a section of bare wire along your desired connection, and solder it down. You don't even have to hit every pad to make it work.
answered Oct 20, 2019 at 16:32
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The bare wire (you can use cut-off resistor or diode leads) is the best approach, but there is a technique to making solder blobs connect.
Experiment with cooling the tip on a damp sponge before dragging the solder sideways to join two existing blobs. If you get it too hot it will not join. Lead-free solder may be an advantage in this situation as it behaves more "gummy" than beautiful shiny Sn63Pb37 solder.
answered Oct 20, 2019 at 16:52