MEP EP#361: Cold Welding This Podcast Together

Podcast Notes

Adding Cold Welding Function to any Welder

  • Cold spot weld function
  • Most tig welders interface with a 5 pin foot controller
    • 3 pins for potentiometer – analog signal telling how much amperage
    • 2 pin switch for initiating the arc
  • Made a circuit to spoof the footswitch
    • 555 timer to set the duty cycle
    • Monostable mode
    • Capacitively coupled to allow for single button presses
  • Range: 1ms to 100ms

Special thanks to whixr over at Tymkrs for the intro and outro!