I need to bury a 12V PSU somewhere in the MIG welder and connect it up to the spare pins on the front connector. Currently, only 2 are used - for powering the spool gun. That's handy.
Some double sided foam tape holds the 12V PSU in place. This was about the only flat surface I could find to fit it.
The connector can be removed easily enough, so I can solder the additional pair of wires on:
If you look closely, you can see that the lower pin is the +12V and the upper pin is the 0V:
With toroidal chokes fitted to both the input and output cables, hopefully that SMPS will behave when the machine is running in anger. Here it is with the lid ready to go back on.
Now I just need to connect up the 3.5mm switch wiring in the torch handle and the 12V supply to the Motorhead. Then I can try this thing out for real.
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