Arduino Powered TIG AC/DC

The idea is not new, but there are very little open source projects on this. The only promising link was, but no hardware diagrams. My existing TIG welder is DC only, a look inside reveals a design similar to below, with three transformer stages in parallel.


Now convert this output to AC. Easy? Add an H-Bridge and Arduino to control it. And there you go inverter welder in AC/DC/Pulse mode. I also found the below circuit which uses IGBT’s and additional diodes. could not quite figure out the advantages apart from cost.


Leave a comment if you would like to see more on this.


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