Small Generator

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How to make a simple generator (simple model generator) Ac 230 V - small generator science toolbar


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We wish to show how can a small simple ac generator can be created, which can be used for educational purpose to help the teachers to explain how electricity can be created and how it works.

The rotating magnetic field induces an ac voltage in the stator windings (coil ). The rotor’s magnetic field is produced by the neodymium magnet sphere. The permanent magnet field is constant and the terminal voltage varies directly with the speed of the dc motor. This is an AC electric generator which can lights up two led bulbs 7 W 230 V.

Electric generators are devices which are using alternating magnetic fields to create a current through a wire circuit ( alternating current) AC. An electric generator converts mechanical energy into electrical energy by generating voltage (EMF) that forces electrons to flow in an electric circuit. This is called electromagnetic induction.

Step 1: Materials Used to Create a Simple Electric Generator

Step 1. Materials:

small Ac simple generator using a single neodymium sphere

1. 3V Dc motor – inside toys which using two batteries 1.5 V AA – simple generator component 3 V dc motor

2. coil without core inside syncronous motor 230 V – A4 laminators, microwave turntable motor – simple generator component coil without core - inside syncronous motor 230 V

3. neodymium magnet sphere 12.7/13 mm – simple generator key component

4. neodymium screw pot metal case 12.7/13 mm – remove neodymium magnet from the metal case – simple generator component

5. plastic connector used to fix screw pot metal case – dc motor ax inside car toys – heat the crew pot metal case to fix the plastic connector – simple generator component plastic connector used to fix the screw por metal case to dc motor ax

6. plastic and metal components from mechanical construction kit – used to build the holder for dc motor and coil – simple generator holder construction kit

7. 3.7 V battery 600 mAh or a related battery 3,7 V rechargeble battery 600 mAh

8. 230 V - two led bulbs 7 W + E 27 two sockets 230 V

9. power switch + wires

Step 2: Operations

1. Remove the magnet from the neodymium screw pot metal case

2. Remove the coil from the syncronous motor

3. Attached the screw pot metal case to the dc motor ax through the pleastic connector

4. Create the simple generator holder

5. Conect the wires to the dc motor and battery through the power switch.

6. Conect the bulbs using wires to the coil output ( in Ac current it doesn't matter the conection order, only in dc is very important), but conect the bulbs in parallel.

small Ac electric generator

Step 3: Assamble the Components

Assamble all the components ( you can use different coils, different dc motors, magnet spheres, srew pot metal case and batteries) using the diagram photo

Important! the position neodymium magnet sphere 12.7 mm – screw pot metal case (magnetic catch ) between magnetic poles (N and S) Do not use magnetic materials (screws , etc ) for the simple generator holder near the neodymium sphere – it will act like a magnetic brake for the sphere.

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2 People Made This Project!


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17 Discussions


1 year ago

See US Patent # 6879076 "Ellipsoid Generator". (Including spheres)

copyrights cover text and visual content.

3 replies

Reply 4 weeks ago

As we all know if something is patented this not means is working in practice in theory......looks great
to be more specific : take a look over patents free energy generator....
it is a joke...if you ask me
energy is always transfered from one system to another with "leaks"
you can push the limit of physics to the end - implies more than 1 system to transfer energy resulting a generator with an " interesting yield" for example this one....


Reply 1 year ago

Thank you for the informations. I analyzed the informations and I found them very useful. There are some diferences for example, the magnetic catch I used between the magnetic poles, which is not moving even at 26.000 rpms.
This is the first problem I found when I start my project. It is hard to fix a metal in general between the magnetic poles - the metal tends toward N pole or toward S pole , only if you use a screw pot metal case like I used it is simple to fix it in any spot on the neodymium sphere you wish.

Thx again for the informations.

position neodymyum sphere - metal case.jpg

8 weeks ago

Can I use any of the copper wire in the
syncronous motor if not what are the specifications please tell me have to submit it monday

1 reply

Reply 8 weeks ago

I have neyodemim its self but it is circular in shape and what to do about the thing that connects the magnet and the motor


Reply 8 weeks ago

You can make a simple generator using the magnets you have, to a fidget spinner with iron insertions, a coil iron less, (thin wire ) and a led.... a small AC generator

Adding a reed switch on the coil you will obtain a DC generator :



Reply 8 weeks ago

If you wish to build an efficient generator take a look over the " magnetic oscilator " for the moment is just a prototype.

mini solar panel - voltage variator - coil iron less 1 - coil iron less 2 - neodymium magnet sphere - rectifier circuit Ac - to DC - led



Reply 8 weeks ago

will there be any problem if the battery gives out 4.8v and700mAh


Reply 8 weeks ago

No. it will be not a problem you need 5 V range - electric motor for that battery. The presented one it is just an example. Using powerfull motors, batery, coils thick wire - will increase the power of the generator .

You can use also a PWM controller it will alow you to use large batteries on small electric motors :


Reply 8 weeks ago

through a plastic connector - an example is in the uploaded picture. Heat the metal case stick it in the plastic connector .

plastic connector inside toy car.jpg