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KaeptnBalu / Arduino_Spot_Welder_V4

This is V4 of the Arduino Spot Welder. An Arduino based Spot Welder for battery welding
https://malectrics.eu/
GNU General Public License v3.0
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Using Cap Bank #5

Closed BenJBachler closed 1 month ago

BenJBachler commented 1 month ago

I would like mod this use a capacitor bank as a current source and a lab bench power supply as a power source instead of a battery. I'm thinking of adding a 3rd board to mount the capacitors and a mosfet to disconnect the power supply once charged. Is there an engineering reason this wasn't done before and would it be possible to integrate this into your design?

KaeptnBalu commented 1 month ago

It was not done yet because the necessary capacitor bank to deliver enough power is much more expensive than a car battery or lipo. There is no technical reason against this idea.

BenJBachler commented 1 month ago

This is more in depth than I thought, if you don't mind helping with this. The battery pack would provide constant voltage and the max current that the welding surface will allow while a CD welder's voltage would drop as the charge is drained. How much does this affect the weld? I am thinking about taking the route shown here and replace your Mosfet board. I think I would have to tailor your code to make this work though. Another idea that would be simpler would be to use a dewalt battery and a regulator board to provide the VCC voltage for the nano but I don't think the mosfet can handle the extra voltage (dewalt is 20V). Would using a dewalt battery be too much voltage?