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