Thank you all for the suggestions.
I did some testing on the supply and I might be at the limit of what it can output. I don't notice any voltage sag with the pedal alone, but that might change with the circuit in place. How do you test a power supply? Is it acceptable to put a variable resistor to ground, and slowly lower the resistance until you see a voltage drop? And how much is an acceptable drop, 10mV, 1mV?
Also sparky1, my environment is really not that harsh, it's a clean home workshop. The welder is inverter based (no heavy transformer), and sits on a cart. I will build a custom enclosure around the pedal, but that's about as far as I'll go. It will be no worse than a commercial pedal, except for the spill-proof aspect. The benefits far outweigh any potential shortcomings though. Being a car throttle, the internals are engineered to give perfect modulation, no commercial TIG pedal will come near it.
I did some testing on the supply and I might be at the limit of what it can output. I don't notice any voltage sag with the pedal alone, but that might change with the circuit in place. How do you test a power supply? Is it acceptable to put a variable resistor to ground, and slowly lower the resistance until you see a voltage drop? And how much is an acceptable drop, 10mV, 1mV?
Also sparky1, my environment is really not that harsh, it's a clean home workshop. The welder is inverter based (no heavy transformer), and sits on a cart. I will build a custom enclosure around the pedal, but that's about as far as I'll go. It will be no worse than a commercial pedal, except for the spill-proof aspect. The benefits far outweigh any potential shortcomings though. Being a car throttle, the internals are engineered to give perfect modulation, no commercial TIG pedal will come near it.
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