Introduction: Draaiend (Valentijns)hart / Turning Heart

Picture of Draaiend (Valentijns)hart / Turning Heart

Dit gaan we maken: een draaiend (Valentijns) hart, je hebt hier maar een paar simpele dingen voor nodig!
Dit heb je nodig:

  • Een batterij (AA)
  • Een sterke magneet
  • Elektriciteitsdraad
  • Een kniptang
  • Een striptang
  • 5 cent muntstuk

Let us provide you with a translation of all that.
This is what you're going to make here: a rotating (Valentines) heart or homopolar motor, for which you need just a few simple things!

This is what you need to make this:
- A battery (AA)
- A strong magnet
- A piece of electricity wire
- A cutting tool
- A wire stripping tool
- A copper coin

Step 1: Voorzichtig...

Picture of Voorzichtig...

Maak een deukje in het midden van de batterij. Let op: Dit moet aan de plus kant (+) van de batterij, in het midden. Dit doe je voorzichtig met de punt van de kniptang. Pas op, want die is scherp.

Make a dent in the middle of the battery. Be careful: do this at the 'plus' (+) side of the battery, right in the middle. You can use the sharp end of the cutting tool for this, but take care with this job... (if you're not comfortable in doing this, ask someone else to do it for you).

Step 2: Nu Gaan We Draad Strippen En Buigen

Picture of Nu Gaan We Draad Strippen En Buigen

Pak de striptang en strip hiermee ongeveer 20 cm van de elektriciteitsdraad. Hiermee haal je de buitenlaag eraf en blijft er een koperkleurige draad over. Buig daarna de draad doormidden.

Take the wire stripping tool and strip about 20 centimeters (about 8") of electricity wire. With this action you will remove the outer layer of plastic and you will end up with only the copper core. After that, bend this piece right in the middle as shown.

Step 3: Striptang Inzetten Voor Deze Klus

Picture of Striptang Inzetten Voor Deze Klus

Gebruik de striptang om de vouw in de draad strak op elkaar te zetten. Zo plat mogelijk duwen.

Use the stripping tool to make the fold in the wire as tight as possible.

Step 4: Hartvorm Maken

Picture of Hartvorm Maken

Buig met behulp van de striptang een hartvorm van het draad. Nu heb je de bovenkant van het hartje. Pak de batterij, leg de 5 cent munt eronder en vervolgens de magneet.

Now you can bend a heart shape of the stripped wire with the stripping tool, giving you the upper part of the heart. Take the battery, put the copper coin underneath and then the small magnet.

Step 5: Vervolgens De Onderkant

Picture of Vervolgens De Onderkant

Ter hoogte van de 5 cent munt vouw je aan de onderkant van het draad een rondje. Let op: de ene kant buig je naar voren en de andere kant naar achteren. Lastig klusje.

At the height of the coin, you create a round piece of wire. Take care: bend one end of the wire to the front and the other end backwards. Tricky little job this is.

Step 6: Tenslotte

Picture of Tenslotte

Zet het hartje op de batterij.
Het hartje gaat automatisch draaien door het elektromagnetisch veld. Het is belangrijk dat het hartje in evenwicht is. Kijk naar de verschillen tussen plaatje 1 en 2, op het tweede plaatje zie je een echt mooi gevormd hartje! Buig de linker- en de rechterkant van het hartje dus zo gelijk mogelijk! Zorg dat de onderkant contact maakt met de 5 cent munt.

Now put the heart on the battery.
Your heart will automatically start turning, caused by the electro-magnetic field. It is rather important that the heart is in balance, with the two sides having the exact same shape. Look at the differences between the first and second heart, the last one is really well shaped. So bend the two sides as equal as you can! Be sure that the lower part makes contact with the copper coin.


ArduinoDeXXX (author)2015-07-19

I tried making the heart-shaped motor described here. The only and the most difficult work is to make both ends of heart-shaped wire be touching the coin (as negative terminal) with little friction.

I could not make it within 5 minutes. And I could not get adequate performance at first. Its electromagnetic force seemed to be weak to rotate heart-shaped wire continuously.

Therefore to reinforce the power, I divided magnet pole into three shorter pieces and set them parallel on the base. And I did not make the pit on the battery described in Step 1 to reduce friction on the rotor wire. Then I could make the heart-shaped wire rotate well. Though no spark is observed, battery becomes warm or hot to some extent.


The copper wire (as the rotor) and the coin (as the negative/positive terminal) become VERY HOT, if you use rechargable battery which has lower internal resistance such as Nickel-Metal Hydride battery (NiMH battery) instead of the alkali battery (non-rechargable battery).

lourens01 (author)2014-03-11

Ek dink dit is wonderlik dat jy die instruksies in twee tale uiteen sit. En behalwe vir dit is dit ook 'n fantastiese "Instructable". Baie dankie.

I think it is wonderful that you did the instructions in two languages. And besides that, it is also a fantastic Instructable. Thank You.

(First part is in Afrikaans, close enough to Dutch that we could understand each other)

fran=1 (author)2014-01-21

that is a neat pair of stripping pliers! were can I get some like that?

nunyafb (author)fran=12014-01-25

Ok I have the answer and for $$$$ I'll share. Ok never mind but I do want a tiny bit of credit for this. I noticed the bar code in one of the pictures. I used my phone I won't mention the brand because I hate the company that makes it but it's provided by my work and I need to have it with me. besides the apple company is so arrogant making propitiatory connectors I think they suck. Oh did I say that out loud? so I scanned the bar code but it did not match the wire strippers that we see. The bar code does lead me to Amazons web site where i learn the manufacturer is "Knipex" I then painstakingly go thru every product listed by that company and found this I'm not saying this is the best price but this is the tool we see. I was going to make my first instructible on how I found this but then thought I would get flamed for being so lame even though it was ment to be a gag. I'm now looking for a better price.

nunyafb (author)fran=12014-01-25

I agree I love the tool as well anyone could you provide the manufacturer?

mkinoma (author)fran=12014-01-21

Apparently, not in the US. There are tons of interesting designs available but none quite like these...

fran=1 (author)mkinoma2014-01-21

still I would like to have a pair like there someone out there that could send one to me,that is if the post and the plier cost is not out of reason ..frank at

Sam McPhie (author)2014-01-24

This is totally awesome , you are so creative. This would be a great school project.

f.3 (author)2014-01-22

To understand how this works you need to look at how a battery is made. The copper coin on the bottom is used to complete the circuit between the positive and negative terminals of the battery. Also being bigger in diameter and yet not very thick or heavy it acts as a good contact plate for the moving wire. It's kinda like the idea of "brushes" in an induction motor. the applied magnet does two things. One; it is a reusable mounting device to keep the copper coin stuck to the bottom of the battery. Two; it starts the generation of an electrical field so that the wire will spin. The wire is trying to find a balance between the two magnetic poles.. North/South. Because it is fixed on a cylinder it spins. To keep it spinning continuously the wire uses the energy of the supplied electricity thus making it a small electric induction motor and not a compass. The battery I'm sure does get a little warm as it would in any other use but because energy is being used quickly should not get hot and would be a very good project for beginners in electric motors and school age children to use as a hands on science project at home or school. Though if you were to not use a magnet with enough strength like the average Refrigerator magnet or no magnet at all or even restrict the wire from turning while the battery still has energy stored to convert then yes the battery and wire would get very warm burning hot even given some variables. Also at the beginning of this Instructable the author said to dent the top of the battery terminal not pierce it. These projects can be fun but you still need to use your head a bit. I hope that my comment has helped a few of you with answers to inquiries. I think the Author did a great job though the alternative language through me off a bit. For the record I am not against that use though. I am glad more and more people are getting involved with these.

sasquatch67 (author)2014-01-21

Looks great, something I could use in the class room. Any chance of getting an English version?

hamidmahjoob (author)2014-01-21


rkretzschmar (author)2014-01-20

Nice... Now I'll work on JC'ing enough copper to send a current letter of luv to a certain someone this Feb 14th-July 26th even though Sandra Bullock and I are both Wood Dragons.

tiggerlick (author)2014-01-20

Mit der spitzen Sparken und der Kaboom und kaboomen den der Konotrapzechen is kaput, ja?

studleylee (author)2014-01-20

How long will it run?

heatherm2 (author)2014-01-19

so neat - maybe it would be even more cute if the battery was covered/wrapped with a little bit of pretty paper or red construction paper?

Phoghat (author)heatherm22014-01-20

Good idea, and I have just made one, painting the wire first with plain white nail polish, then a coat of red glow in the dark paint

studleylee (author)Phoghat2014-01-20

UV paints: I was just thinking that!

lexip (author)2014-01-20

That's a very nice and quick project.

One question though, as the wire is pretty thick and hence has little resistance, doesn't it mean you've put a direct short between the plus and neg side of the battery and therefore the battery will drain very quickly (and I would have thought the wire and battery would get hot as well)??

I'm interested how well and how long this little motor works for, before the battery has drained, or gone into meltdown? (;->

lknowles (author)2014-01-20

Love it! Great kid science idea.

thomkhall (author)2014-01-20

Just made this in 5 minutes with my kids. they thought it was awesome. Thanks for the quick easy project!

mdeblasi1 (author)2014-01-20

Stripping is going to work harden the wire.
if you then anneal it, (you can do this, for copper, on a gas stove; put the wire right into the flame and heat it to cherry red), It will bend like warm butter.
By doing this, you will get far fewer kinks as you work.

When you have fully created your shape, if the wire still feels a bit plaint, tap tap tap the whole thing with a rubber mallet, that will work harden it again.

nerd7473 (author)2014-01-18

is this German?

emilyvanleemput (author)nerd74732014-01-18

Nope, it's Dutch :)

nerd7473 (author)emilyvanleemput2014-01-20


Thomas Calhoun (author)nerd74732014-01-18

I could be wrong but maybe Norwegian.

hvweezel (author)2014-01-20

Probleem #1 : Wie heeft er nog een stuiver ?

mnc (author)2014-01-20

This is really nice but, if I only give this for valentines day, she would probably kill me. :P

Phoghat (author)2014-01-20

After stripping the wire, and before doing all the bends, you can straighten out all the kinks in the wire by clamping one end in a vise, and attach the other end either in a hand drill, or in the chuck of a variable speed electric drill. Very slowly apply power so the wire twists, and it will become straight

d3vils (author)2014-01-19

What's d use of strong magnet which u have mentioned at d beginning??

JMRaphael (author)d3vils2014-01-19

The magnet goes at the bottom of the battery, in contact with the wire, I believe. It's the interaction between that strong magnet and the magnetic field generated by the current through the wire that causes the rotation.

JMRaphael (author)JMRaphael2014-01-19

Edit: it goes beneath the coin at the bottom of the battery. Generally, the coin is optional, but I would guess it provides a better contact surface.

metalshiflet (author)2014-01-19

Very nice and cute

Hangfire (author)2014-01-19

It's a tiny motor :) Very cool Instructable!

iminthebathroom (author)2014-01-19

This is awesome

FabSchool (author)2014-01-18

Just added an English translation for all of you that do not master the Dutch language ;-)

J,R,D, Ltd (author)FabSchool2014-01-19

Thank you! Good Instructable!

MohamedAmine (author)2014-01-19

nice thanks (y)

Bor (author)2014-01-19

Why are Instructables in other languages suddenly a trend? Dutch is my first language as well, but I think it's a lot more consistent / easy for everyone if we just stick to one language.

kelt620 (author)2014-01-19

leuk in Nederlands eens kijken als het werkt

PhilsTj (author)2014-01-18

That is so cool. I am going to make that for my wife for valentines day. Thanks!

nireves1 (author)2014-01-18

erg mooi dank je wel! nu moet ik alleen nog begrijpen hoe het werkt:)

diy_bloke (author)2014-01-18

leuk bedacht

nic nak (author)2014-01-18

Cute! I'm afraid I only know swear words in Dutch :-/

mden breejen (author)2014-01-18

Leuke instructable. Nice instructable

Saeed Nazarian (author)2014-01-18

that's cool. can u add electromagnetic field to picture to better understanding how it work?

boatingman (author)2014-01-18

This is great. I'm looking at this on my phone and can't figure out how to make it translate. I also don't speak German but the pictures were enough to figure it out.

FabSchool (author)boatingman2014-01-18

To help you we've provided a translation...

Vitaliymigas (author)2014-01-18

Totally Dutch instructable!!!)))

FabSchool (author)Vitaliymigas2014-01-18

Created a translation for you, how about that.

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