Fortunately, though, a decent spot welder isn’t that tough to build, as [KaeptnBalu] shows us with his Arduino-controlled battery spot welder.

The science pros at The King of Random guide viewers through building an affordable spot welder at home. Comedian’s arrest ...

Spot Welding leaves two familiar divots in the attached tab, which can be soldered or welded as need. For the unfamiliar, a battery spot welder is the magical device that attaches tabs to ...