Make a Cheap Spot Welder

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Intro: Make a Cheap Spot Welder

How to diy a cheap spot welder

Step 1: We Will Remove Secondary Coils With a Hacksaw

Part list:

01. 12V Relay Module External Trigger Delay Switch Time Adjustable

https://www.banggood.com/External-Trigger-Delay-Sw...

02. Button Switch

https://www.banggood.com/3A-250V-Off-on-Non-lockin...

03. 0.15x8mm Nickel Plated Steel Sheet Strap Tape Strip For Battery Spot Welding

https://www.banggood.com/0_15X8X200mm-Nickel-Plate...

Step 2: We Will Add a Second Coil

I use the 70mm cable from old generator you can use other types welding cable. I recommend using a 35mm or more cable

Step 3: Box

I use old ATX psu for the box

Step 4: Timer - Switch - Welding Needle

01. Timer

You try to use other types but there is a note that you should select the timer can set the value is 0.1s. Because if your transformer is of great value long time can burn nickel.

02. Switch

I use a foot pedal from old motor bike. You can use a button as step 1.

03. Welding Needle

I use a needle of electrical soldering iron gun. There are many options for you

Step 5: Modular Design

I designed the module to avoid the wires.

Thanks for watching my friends. See you on next project

You can support me by watching the clip on Youtube.

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    7 Discussions

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    ManoelG3

    Question 27 days ago

    You said "70mm cable from old generator".

    70 mm is a width just a little less than 3 inches.

    Isn't it 0.7 mm?

    0
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    VietnamReviewsBobtoomey

    Answer 3 months ago

    This timer use 12v DC and transformer use 220v AC my friend

    0
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    DanC317

    Tip 3 months ago

    Instead of using another connector for 12V, you could add a power supply inside and connect it to mains.

    1 reply
    0
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    VietnamReviewsDanC317

    Reply 3 months ago

    Thanks my friend because i can use a 12v adapter for more project

    0
    None
    VietnamReviews

    3 months ago

    Yes my friend. You can see on clip 4:55 my finger touch the cos