Macrofab Engineering Podcast

MEP EP#361: Cold Welding This Podcast TogetherAdding 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