Ho-hum, another microwave oven transformer spot welder, right? Nope, not this one — [Kerry Wong]’s entry in the MOT spot welder arms race was built with safety in mind and has value-added features. As ...

The project illustrates how to build a homemade spot welder which can be used for welding two pieces of metal together by producing a highly defined point of contact weld and using a microwave oven ...

Spot welding should easier than it looks. After all, it’s just a lot of current in a short time through a small space. But it’s the control that can make the difference between consistently ...