> This is what I was referring to:
> https://www.youtube.com/watch?v=3DsjH8I1oKNMY
>
> I wasn't suggesting a car battery be used for welding battery tabs but
> advising the poster about
> how a car battery welding setup is powerful enough to weld steel.
> I would compare it to using a pneumatic hammer to push in a thumbtack.
> Mark

Yeah, what he's doing is arc welding. You can do it with less than 50A.

What I'm doing is spot welding and I'd prefer to do it with a current in
the order of 100s-1000+A for a few milliseconds at most. A car battery
would be great for this.

But I already found a 1.5kW microwave oven transformer and this is going
to be a lot easier to control. 20A TRIACs or solid state relays are
readily available near me and I'll be able to switch the primary easily.
No expensive power MOSFETs or capacitors required.
--=20
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