Cheap Spot Welder Circuit. A DIY spot welder for batteries is easy to build with these free instructions. The spot welder circuits are versatile ultrasonic and automatic functioning.
The first spot welder I purchased was off eBay since that was the cheapest place I could find. A typical resistance spot welder can range in price from about 200-800 but with a little resourcefulness and a bit of free time you can make one like this for about 10 or less. And no crazy thick copper wires.
Here is a step-by-step tutorial on how to make an 800 amp Spot Welder from common materials and for dirt cheap.
Other materials included scrap 26 22 two copper screw type lugs two copper welding cable lugs two MIG welder. The best way to understand how it works is to check a demo on YouTube. Welded all day with 332 7018 set at 100 and no. Before starting on this project there are a couple of videos you should check out because you may want some background on how the device works.
