DIY Spot Welder

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DIY Spot Welder
Skills Electronics, Experimentation
Status Getting parts
Niche Hardware
Purpose Use in other project
Tool No
Tool category

DIY Spot Welder

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For welding batterytabs, i thought it would be nice to have a spot welder.

Parts needed

  • Microwave transformer (got this)
  • Thick-ass copper wire (profzon or the0 is getting this probably)
  • Delay timer ( ordered )
  • Momentary switch
  • Some kinda auto-fuse box?
  • Case
  • Welding handle

Build log

Got some work done today. First hit the secondary coil out of the transformer with a chisel and hammer. Then made a simple welding handle and used the 4mm2 (~awg 11) wire with two loops. Measuring showed I was getting about 1.6V. Welding sorta seemed to work, but couldn't get anything welded, and wires got very hot. Really need something thicker I guess ...

--buZz (talk) 01:48, 8 June 2017 (CEST)


(well, they are all -very- similar, just search around)