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|transformations = 
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|tools           = [[Soldering irons]], [[3D printers]], [[Helping hands]]
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|reversible      = true
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[[Category:Transformations]]
[[Category:Electric parts]]

=Introduction=
Soldering is a process in which two or more items are joined together by melting and putting a filler metal (solder) into the joint, the filler metal having a lower melting point than the adjoining metal. Unlike welding, soldering does not involve melting the work pieces. In brazing, the work piece metal also does not melt, but the filler metal is one that melts at a higher temperature than in soldering. In the past, nearly all solders contained lead, but environmental and health concerns have increasingly dictated use of lead-free alloys for electronics and plumbing purposes.

=Challenges=

=Approaches=
<youtube>_RXugDd0xik</youtube>

======Through hole======
  * iron
  * wave

======Surface mount======
  * hot plate reflow using 3D printer
  * wave

======De-soldering======
  * wire wick
  * solder sucker
  * solder pot
  * wave
  * hot air

=Development targets=

=References=
  * [[https://en.wikipedia.org/wiki/Soldering|Wikipedia: Soldering]]
  * [[https://cdn.shopify.com/s/files/1/0038/9582/files/RBBB_Instructions_06.pdf|RBBB Instructions]]
  * [[https://en.wikipedia.org/wiki/Reflow_soldering|Wikipedia: Reflow soldering]]
  * [[https://en.wikipedia.org/wiki/Wave_soldering|Wikipedia: Wave soldering]]
  * {{wiki:NASA Technical Standard 8739.4 w- change 6.pdf|thumb}}