All it does is time the activation of the relays that control the gas flow, power, and wire feeder, so [Brett] decided to use an Arduino instead. The welders control circuit runs at 24V ...

Built as an educational demonstrator, this is a complete arithmetic-logic unit (ALU) using discrete relays — and not ... for visualization (using an Arduino for convenience) and IO forming ...

Finally, your Arduino toolkit will be incomplete if you ... it’s a good idea to grab a couple of motors and relay modules for your tiny microcontroller. Really, the sky’s the limit when ...