Simple DIY Dual Pulse Spot Welder with Arduino Controller and Screen (microwave transformer based)

So you want to build your own spot welder? I did too! I found lots of good how-tos out there, but most of them require hard to find parts, custom PCBs, or some other such barriers to entry. So I decided to take the principles that I learned from reading all those how-tos and make my own version of them. I tried to make this spot welder as simple yet robust as possible.”