Car Battery Mig Welder

My Mig welder quit working and I believe it was due to a transformer. So I turned it into a portable mig welder that is ran by car batteries.

This welder is perfect for Trail Rigs and for Off-Road.

Here is the inside of my old welder. I am only going to use a few parts from this as the new welder is very simple.

The only parts I need from the old welder are the DC motor Feed assembly, Spool holder to hold the wire spool, Ground cable, and the Mig gun.

Additional parts that I needed were:

- 24v DC PWM Motor Controller: You can find these on Ebay for about $20-$25

- Jumper cables

- Two 12v car batteries

- Toolbox: Got mine for $6 at Menards

- 24v switch so you don't have to detach jumper cables all the time

I used the tray in the toolbox to support all of the parts. The bottom section was used to store all of the cables and wiring.

I have some pictures of the top of tray, which turned out nice and clean. The underside doesn't look that pretty so I decided just to make a wiring diagram so everyone can better understand how I wired it instead of trying to follow wires in my pictures.

As you can see, it weld pretty good for being a toolbox welder. For a clean look I just disconnect the Welder leads and store them under the tray when I am done instead of having everything run out of holes in the side of the toolbox.

I will definitely be taking this out with me next time I'm out on the trails.

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