The Miller S-22A wire feeder can have these features ... so [Brett] decided to use an Arduino instead. The welders control circuit runs at 24V, so an optoisolator receives the trigger signal ...

Miller Electric has announced the release of the next generation of Trailblazer engine-driven welders. New Trailblazer 330 machines are 86 lbs. lighter and 13% smaller than previous models.