TIG Pedal for non-pedal TIG welders

I tried running the Arduino on a 2 cell lipo battery and this seems to have fixed the problem with stopping the code execution when the torch is ignited in HF mode. So I think I will include this battery pack into my design and therefore also a micro or usb-c plug and charging module.

After some more welding I saw that the Arduino basically stops executing it's program sometimes and starts again after a reset. I think the HF ignition is responsible for the problem. The first thing I want to try is to power the Arduino from a battery. Atm it is powered from a USB charger. If this doesn't help, I will need to invest some time in thinking about better shielding of cables and housing. Will keep you updated.

I 3d printed the clamp and it fits quite well. I think I will add a poti to limit the maximum current next to get the full range from 5 to max Amp of the pedal. Then I need to think about a housing for all of it. Perhaps I will put it inside the panel or onto the clamp itself or even build a small separate case to not put to much weight onto the knob. 

A first working prototype with a simple mount has been built and tested. It seems the components work together and the mechanic also works. ATM not the full range of 200 amps is available; I saw that there are servos that can handle about 270 degrees; that should work.