Microwave oven spot welder

I made a spot welder out of a microwave oven transformer and a starter cable. Those are quite popular actually. They use a solid state relay to switch the transformer on and off. I use a Fotek SSR-40DA DC-controlled 40 A AC-zero-crossing-switching solid state relay. It was only 4 € and free shipping on eBay. First … Continue reading Microwave oven spot welder