DIY Magnetic Connectors

About: I'm crazy about inventing new things..... and thanks a lot to instructables website which helped me to share my ideas...

Hello innovators !

I'm back with another interesting instructable ! i.e magnetic connectors !

By using this we can easily connect the AA , AAA, AAAA, C, D batteries in our projects ...i.e in which the battery uses the metallic contacts..!

so lets get started !!!

Step 1: Parts Required !

1. Neodymium magnets

2. soldering stick

3. wires

4. AA batteries.

Step 2: Soldering !

Just solder a wire to the neodymium magnet .... that's all it is so simple !

when I was soldering a wire to neodymium magnet... I thought that the heat will reduce the magnetic power of the neodymium magnet... but soldering doesn't affect the magnetic power of the magnet..!

and this is my youtube video ....

and if you have any suggestions plz comment below !



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    5 Discussions


    1 year ago

    Should mention that soldering to Ni is a pain, but if you do it right (ie low temperature indium solder) it works fine. The trick is to set the temperature of iron at the lower Curie (ie reversible) temperature for NIB magnets and use lots of flux.

    2 replies

    Reply 3 months ago

    Yes. If you heat the magnet to over 8o degrees Celsius, you will loose some or all of the magnetism depending on how long you heat it.

    There is supposedly a trick to counteract at least some of this effect. I have not tried this, but the idea is to stick the magnet being heated directly to a much larger, stronger magnet. The idea being that, that way, as heat is applied, the magnetic alignment of the atoms will remain mostly in phase with the magnetic flux of the larger field. Also be aware that the larger magnet will act as a heat you should use an iron with plenty of thermal mass.

    I would still do the following even when using a larger/stronger magnet...
    1) use the lowest heat solder possible.
    2) prepare the magnet by scratching or etching the surface slightly
    3) use flux as conundrum2142 stated
    4) pre-tin any wire that will be connected to the magnet
    5) Apply heat for as short of a time as is possible

    Another warning is that neodimium is very heat permeable meaning that it will "suck up" the heat being applied and retain it possibly super heating. Beware of burning yourself or your working environment.

    In general, you may be better off using/creating some kind of mechanical pressure fitting, and/or using conductive epoxy.


    Reply 3 months ago

    By the way, I have found that heat-shrink tubing works to create a pretty good pressure fitting for some applications...usually backed up by standard epoxy and/or cyanoacrylate to adhere the heat shrink to the magnet and to the wire.