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.

Comments

[ManoelG3]

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?

[Ouat-Ever]

He is mixing up two units of measure (UOM), instead of talking about Centimeters, he accidentally uses Millimeters.

The NEW SECONDARY is somewhat shorter than 1 meter, so 70 Centimeters, which happens to be almost exactly 2 feet, and the 35cm is slightly longer than 1 foot (=33cm).

And a BIG Post Scriptum (P.S.);

1) When working with HV/HT/HC power, always put one hand in your pocket or put your other arm behind your back, like an ice-skater.

2) When you have to touch anything close to live wires or components under high current / tension, always use the back of your hand!
At currents above 100mA (I think it is, verify this first!) your brains signals to your limbs and fingers are literally jammed or overpowered by the amount of current from the power source, when touching a live wire with the inside of your hand, you will NOT be able to let go of the wire, and that's when it's time for someone to call 911, 999, 112, etc.....

That's just my 'two Cents' worth of information. Perhaps it will save one idiot from doing him/her/itself in.

Uhm...Have a nice day?

Cheers and Have a Nice Build !

TSD

[he111ju88]

A pedal is a lever or mechanism operated with the foot, you don't need to say "foot pedal", there isn't such a thing as a "hand pedal".

[VietnamReviews]

Thank you so much. My friend

[Bobtoomey]

What are you using for a power supply?

[VietnamReviews]

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

[DanC317]

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

[VietnamReviews]

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

[VietnamReviews]

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

[kode1303]

Safety??