[Brett] from [Theoretically Practical] has done with his old MIG welder, adding premium control ... post-flow, and a spot welding timer. Pre-flow starts the flow of shielding gas a moment before ...

Hackaday reader [David] was looking for a cheap and easy way to spot weld copper tabs together. As he notes in his writeup, the properties of copper which are most enticing, such as high thermal ...