Simple DIY spotwelder

daftcunt's picture

DIY Battery Spot Welder - Demonstration & Explanation

For anyone who wants to replace the rechargeable batteries in their cordless drill packs or similar. Awesomely simple!

 

I think I'll build it with the timer board though, so it is easier to use.

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Average: 4.7 (6 votes)

Comments

boldfart's picture

That gets my vote!  I have tried using solder,     and failed!

 

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Nakey's picture
Beta Tester

i have a cordless hilti rotart hamer drill i've been meaning to swap out the pack for.

this might be my motivation to get it done.

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stokkebye's picture

Random Gif Thread

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Needless_Kane's picture

LOL licking that 9V battery eh

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daftcunt's picture

This post was not for you as one needs a little more than "room temperature IQ" to understand it. 

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Needless_Kane's picture

I'm convinced this will not fry a thing lol

Impossible Impossibru GIF - Impossible Impossibru Japanese - Discover &  Share GIFs

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daftcunt's picture

By the looks of it the timer doesn't work, so unless someone finds a millisecond timer it will have to be manual:
 

 

Or risk the thing blowing up in your face:

 

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backdraft's picture
Beta Tester

Maybe an Arduino board + relay for the timer.  

You can find lots of relay tutorials and simple timer codes for it.   Just upload the code and tweak the time.   

Chinese knock off will cost around 10 bucks, so not a huge loss if you can't get it to work. 

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