Introduction: DIY - Magnetic Connectors

Picture of DIY - Magnetic Connectors

Batteries are the only reliable and affordable source of DC supply for small scale DIY projects. However, for using the batteries we require good quality battery holders. Some of the battery holders are quite affordable whereas some are way out of range for a hobby project.

Note: I was inspired to make these connectors after watching this instructable from Matlek ( I have no idea if he actually invented these but i learned to make these from his instructable.

So, i decided to make an instructable which is short, has only necessary details and also material links for those who actually need to make some of these at home.

Step 1: Watch the Video

As i always say, a video is a great tool that provides deep insight into the understanding of the procedure and makes the process simple to follow. However, also visit next steps for additional details and images.

Step 2: Materials Required

Picture of Materials Required

  1. Neodymium Magnets -
  2. Hot Glue Gun -

  1. Neodymium Magnets -
  2. Hot Glue Gun -

  1. Neodymium Magnets -
  2. Hot Glue Gun -

From Home & Local Store: small PVC Pipe (1/2" diameter) and connecting wires.

Step 3: Let's Begin

Picture of Let's Begin
  1. Place 2 magnets on a flat surface.
  2. Strip the wire and evenly spread the wire strands.
  3. Place the wire strands over one of the magnet and place another magnet over them such that the wires are sandwiched between both the magnets.
  4. Similarly, repeat the steps for the other pair of magnets.
Note: Make sure to refer to the images above and the video.

Step 4: Seal the Magnets

Picture of Seal the Magnets
  1. Cut two small pieces from a PVC pipe.
  2. Place the magnets over the metal or a glass surface.
  3. Also, place the small PVC pieces around the magnets, such that the magnets are in center of the PVC.
  4. Pull the wire above and fill the PVC cylinders with hot glue.(see video for reference)
  5. Let the hot glue dry for sometime.

Step 5: Test the Connectors

Picture of Test the Connectors
  1. After the glue has dried completely, carefully separate the magnetic connectors from the surface.
  2. Connect a motor or any other apparatus to the wires.
  3. Take a Li-ion battery and stick the connectors to the battery terminals.
  4. The neodymium magnets firmly stick to the battery terminals and provide a good point of contact.
Note: I made this magnetic connectors mostly to be used with 18650 Li-ion cells, however, just by varying the size of magnets, these connector can be made for almost any type of batteries that have magnetic terminals.

So Friends, this here concludes the instructable, stay tuned and SUBSCRIBE to receive regular updates. In case, you might have missed watch my video and see how i made these extremely useful magnetic connectors at home.


batfastard (author)2017-10-19

thats quite brilliant!

BuenaTec (author)batfastard2017-10-20

Thanks :)

Ghloo (author)2017-10-12

That`s one petfect idea, even for a breakable circuit (to prevent accidentaly rippping a cable out of a soldered connection or pin or something)! I wonder why I have never seen such solution in a market product. Thanks!

tiger12506 (author)Ghloo2017-10-19

Because Apple owns the patent on magnetic connector. Here's one though:

Ghloo (author)tiger125062017-10-19

Ah, makes sense (unlike having a patent for way of connecting a cable with such a common technology as two piece of magnets).

Thanks for the link, for DIY stuff I will use this cool instructable, never the less. ;o)

Ghloo (author)Ghloo2017-10-12

...I wonder, however, to what extent can such magnet damage a piece of electronics such as RasPi or Arduino?

gizmologist (author)Ghloo2017-10-15

Probably none, unless the magnet sits right on top of the chip, and maybe not then.

dmcmurray (author)2017-10-19

You need to be carefully about heating neodymium magnets. Many of the magnets are demagnetized around 212F. Another consideration is how much current the nickel plating will carry. Otherwise, good project.

JimS282 (author)2017-10-19

Great idea...

I am curious about what effect, if any at all the magnetic field has on the battery itself or the flow of current.

rchristie1 (author)JimS2822017-10-19

The magnets would have to be moving relative to the battery for their to be an effect. So no effect once snapped on.

Matlek (author)2017-10-13

Quite useful! Though they look a lot like these magnetic connectors, and you are using almost the same protocol, with the hot glue and the PVC pipes.

BuenaTec (author)Matlek2017-10-16

Yes, thats true. I forgot to give you credits for such an awesome work. However, "Error now rectified". my apologies...

PirateLabs (author)2017-10-15

I started making and using magnetic battery connectors some 12 years ago. It took me a while to figure out how to make them reliable. Now we have phone chargers using the same technology so, it is nice to see this idea finally catching on in production devices. Nice job.

mrwonton (author)2017-10-12

so smart!

diamondemb (author)2017-10-12

Great job.
Very creative. I will definitely use this idea.

About This Instructable




Bio: Awesome Projects, Tutorials, scientific Stuff and homemade Gadgets
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