Heat from the soldering iron did seem to affect the magnetisation - possibly moving it around - possibly inverting it in some places.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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There's another video on YouTube that shows that when you heat a magnet It crosses the electromagnetic Field direction so try doing it on top of a bigger magnet To re-align
It seems it would take a lot more heat to do that to the magnet. I was using them for brazing, and I got the magnet very hot and it didn’t lose its magnetism if that’s a word.
If anyone see's this and wants to try doing it. Stick the magnets to each other when soldering it will help maintain a north and south pole orientation. The reason heat destroys magnets is the particles get excited and change orientation into a random pattern a second magnetic field can help stop this.
Hi try mini spot welding nickel strip to circumference of magnet, leave a tail to solder to. Job done
Solder while attached to a larger magnet. Field less disturbed.
How did this hold up for charging? did it get to hot of anything while charging?
If you over heat a magnet it loses it's magnetism. So wouldn't current running through the wire heat up the magnet?
another alternative: spot weld a short length of nickel strip to the magnet and solder a wire onto that. Yes, I tried it and it welds fine although it took 50j of power on my KWeld spot welder. Note – check the resistance of the connection because I usually see around 200 mOhm ( 0.2 Ohms) which might be significant for some applications. Magnetism totally unaffected.
Thank you for the video, you confirmed my idea so I don't need to test it!
Just a note for everybody: neodymium magnets can loose its magnetism because of excess heat (there are differences how much heat a neodymium magnet can handle) so don't solder them long time. In this video the heat shock is absolutely acceptable.
Edit – Note2: Maybe the solder only diffuse inside the magnet's coating which can be weak. It can be tested by a thick wire soldered and then trying out the strenght of the soldering. I will test it sooner or later and share the result.
If you want to do this and not loose the power of the magnet. Take the magnet you want to solder and place it on a second magnet that is bigger. 2 or 3 times the size. Then you can do what you just did without loosing any of the magnetic strength.
YeeeaHaw 😁 ULTRAFIRE CELL's ✌
Thank you for the video. This is encouraging, I'm planning to try the same thing for a battery pack I'm building. If it works it will be a big help for my application.
wire is magnetized now spreading the magnetic field through wire and affecting magnetic field. Same magnetic field over larger mass
Would there be any resistance in the magnets? I want to have a battery connected to magnets so i can change out for different LEDs but i don't know if i would have to fit a different size resistor because of the magnets
i tried soldering 7mm diameter 1mmthickness
and its 100% demagnetized…