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== Soldering == Soldering is used to create strong electrical connects between components. The idea is simple: * Put two electrically conductive surfaces together and heat them * Melt a solder alloy over the intersection to create a joint * The joint holds the two surfaces together and conducts electricity Soldering has a long history of being done by the blind. The [https://www.ski.org/smith-kettlewell-technical-file Smith Kettlewell Technical File] and [https://www.ski.org/soldering-basics Smith Kettlewell Soldering Basics] websites document techniques used to solder without vision. However these were written in the 1980s and 1990s. These days there's often an added requirement: Components must be placed through small holes on a circuit board, rather than free form. These holes are often placed extremely close together and lack thermal mass. This naturally requires a lot more precision. Even sighted people have difficulty making these solder joints. It's common for magnifying glasses and microscopes to be used just to verify that joints are correct and functional. The current approach I've been using is to avoid soldering and focus on solderless techniques such as breadboards. However many components require soldering additional pin headers to be usable with a breadboard, severely limiting the feasibility of this approach. I fully believe that with the help of some jigs it would be possible to gain the level of precision required to do these joints. I'm unsure about the solution for soldering smaller surface mount components given there's no tactile indication available that the component is position properly. There are pick and place machines that can solder these components automatically but are very very expensive.
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