Instead of purchasing a commercial unit, he set out to make his own spot welder. A spot welder works by passing an electric current through two thin pieces of metal. The resistance of the metal ...

Microwave oven transformer spot welder builds are about as common as Nixie tube clocks around here. But this spot welder is anything but common, and it has some great lessons about manufacturing ...

If you're looking for affordable spot or stud welders, Harbor Freight might be a good option. Here are where its selection ...

DIY spot welder from old microwave for making Li-ion 18650 packs with nickel strips. Uses bluetooth communication in custom Android app to adjust welding parameters ...

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 ...