[Integza]’s rocketry projects are one such example, so he decided to explore turning a MIG welder into a 3D printer for his own nefarious purposes. (Video, embedded below.) The build is as ...

This Spot Welder can be used to weld 18650 batteries. It uses a 12V car battery as welding current supply. Typically one 60Ah 600A battery delivers enough current to get good welds with 0.15mm - 0.2mm ...

[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 ...

This is my version of a DIY spot welder controller. It is intended for use with a modified microwave oven transformer, but may suit other applications too. I have included the PCB Gerber files, BOM ...