DIY Welding tools & more

8 DIY Welding Tool Plans (mostly videos):

    https://waterwelders.com/diy-welding-tool-plans/

Includes good tips & techniques to make these tools

DIY Stick Welder from Old Microwave Parts:
    https://mods-n-hacks.gadgethacks.com/how-to/diy-stick-welder-from-old-microwave-parts-0145489/

DIY Welding Rod:

    https://ia802907.us.archive.org/29/items/Welding-2013-03/DIY-Welding-Rod.pdf

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Make Your Own Plastic Friction Welder:
    https://hackaday.com/2012/12/31/make-your-own-plastic-friction-welder/