Cheap Spot Welder Circuit. Interesting use of recycled materials the only problem is that there is no overcurrent protection fuse or circuit breaker which could be a dangerous condition in terms of electrodes welding to one another or otherwise resulting in a constant-on and potential for melt down of components. These little 18650 spot welders can be found at several online retailers.
4 Comments Rob - February 22 2015 said. SUNGOLDPOWER MIG Gas and Gasless Welding. This welder had some serious limitations.
The spot welder circuits are versatile ultrasonic and automatic functioning.
Typically one 40Ah 440A battery delivers enough current to get good welds with. The first spot welder I purchased was off eBay since that was the cheapest place I could find. This welder had some serious limitations. Cheap Spot Welder Circuit Some ideas And Experiment can be Dangerous.
