I had some hard time soldering new switches to my computer mouse, now it looks like I lost some solder pads, what shouild I do? Every other component of the PCB seems ok cuz I didnt touch it. Photos: https://imgur.com/a/LajwKBP enter image description here

  • \$\begingroup\$ I would prefer it if you pasted the photos directly here (they will be displayed directly in the forum). \$\endgroup\$ – Christianidis Vasileios Apr 1 at 18:27
  • \$\begingroup\$ @ChristianidisVasileios New users are prohibited from posting photos directly until they gain some reputation, if memory serves, presumably to help prevent spam. \$\endgroup\$ – Spehro Pefhany Apr 1 at 18:33
  • \$\begingroup\$ Get a better soldering gun if you're using one of those cheap 'pencils'. Will save you from trashing PCB's. $100 or so for a Weller or Hakko will set you up for life. \$\endgroup\$ – Kyle B Apr 1 at 18:39
  • \$\begingroup\$ Wire it directly to wherever the traces went with a 30AWG wire. \$\endgroup\$ – Voltage Spike Apr 1 at 21:51

The Solder pads that you lost connect to traces. You probably will be able to see them. Scratch the surface (solder mask) of these traces and connect anything you want on those traces

scrape it

Image from: http://www.signalintegrity.com/Pubs/edn/ScrapeIt.htm

Do not scratch too much, or you will remove the trace as well!. Removing the solder mask enough to see the copper like the image above is enough. Then clean the scratched area (with isopropanol) and solder on there. (If you do not have isopropanol use alcohol, but quickly dry it out as alcohol might not be 100% clean

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    \$\begingroup\$ OP....you can get bottles of >99% isopropyl from most 'real' pharmacies. 16oz bottle should be about $5 and last you a long long time. Be careful with it...this stuff is flammable as gasoline but it IS a great circuit board cleaner...evaporates completely and quickly and leaves no residude. \$\endgroup\$ – Kyle B Apr 1 at 18:37
  • \$\begingroup\$ Yes. Also consider using a ventilator when soldering or cleaning with isopropanol (no, soldering outside does not help, you need an active machine that will draw the air away from your). My brother almost has an heart medical problem while he was using isopropanon to clean repaired phones in a company \$\endgroup\$ – Christianidis Vasileios Apr 1 at 18:40
  • \$\begingroup\$ Great comment!!! Sorry about your brother. Yeah don't use this in an unventilated closet LOL. Unless you like getting headaches... \$\endgroup\$ – Kyle B Apr 1 at 18:41
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    \$\begingroup\$ @ChristianidisVasileios: You can also follow the trace to another component and solder your wire to its pads. That usually works better than the scraped off end of a torn trace. \$\endgroup\$ – JRE Apr 1 at 18:56
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    \$\begingroup\$ In addition, leaded solder and solder flux makes things much easier (a common mistake is not ensuring that iron tip is clean from oxidation, brass sponge helps) \$\endgroup\$ – Ernesto Apr 1 at 19:09

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