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can i make a mini electric welder out of a disposable camera? Answered

only for small joints not to be used, just as an experiment

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lemonieBest Answer (author)2009-10-16

Welders need high current more than high voltage. A 12V car battery will happily weld stuff. These things are dangerous with e.g. metal watch-straps, screwdrivers etc.
Otherwise a heavy high-amerage power-supply (not mains, that's asking for trouble)

L

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sharlston (author)lemonie2009-10-19

how about drill batterys?

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stephenniall (author)sharlston2010-01-01

You can But not very good .

I learnt this when  i was using a piece of pencil lead for an experiment and i welded a piece of wire to the battery !

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lemonie (author)sharlston2009-10-19

You might weld small stuff, but would risk damaging the batteries. If you're thinking about full size electric welders think around 50-100 amps (though what they actually use varies).

L

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Molten Boron (author)lemonie2009-10-16

That raises an interesting point. Could you conceivably convert the high-voltage low-amperage (watts = watts) into high-amperage low-voltage?<br />

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lemonie (author)Molten Boron2009-10-17

This is what electric welders do. Input up to 13A @ 240V, output maybe 100A, at maybe 30V (all rough). A big heavy transformer is the largest part of these devices.

L

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Molten Boron (author)lemonie2009-10-17

Badda-boom! Transformer-driven capacitor welding!

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nepheron (author)2009-12-04

I made one with a capacitor from a camera. I wired the capacitor up to a 12v wall adapter and wired the capacitor to two alligator clips. The wall adapter goes through a momentary switch before it charges the capacitor. This keeps the capacitor from over heating/ over charging.

It will "weld" constantly with hair-thin wire attached to one (the negative) alligator clip. The other clip attaches to whatever metal i weld on.

It works so-so for practical uses, but it makes the greatest toy ever!

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Wesley666 (author)2009-10-18

If you want to make a small welder or what I have been wanting to do for a while but haven't got around to doing is making an auto-soldering iron.  I had a dead UPS and they have a transformer in them that plugs into the wall and puts out 30 amps (ENOUGH TO KILL YOU SO BE CAREFUL!) and my plan was to make it like a MIG welder.  A MIG welder has wire fed through the cable to the gun and when the trigger is pressed it feeds it out.  I was going to do the same thing on a smaller scale with the UPS transformer and solder.  You hook ground clamp up to the board in direct path with the joint as to not fry components and then press a button solder flows out and contact to solder.  In theory this should work.  If I get around to making this I will make an Instructable and you can check that out.

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jtobako (author)2009-10-16

It might weld foil, or just burn holes in it.  Not much more.

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jtobako (author)steveastrouk2009-10-17

Not really.  The upgraded version sounds better, but the caps get expensive.  Most of the problem here is that the camera circuit is backwards-but I'm assuming anything that can blister my skin has a good chance of spot welding foil : )

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orksecurity (author)2009-10-16

Very mini. If you want to weld the foil from bubblegum wrappers, maybe.

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steveastrouk (author)2009-10-16

You can use capacitor discharge to weld things, if the capacitors have a low enough internal resistance, because you can deliver a hell of a lot of current very fast. They ARE dangerous when they are run at high voltages.

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