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Para hacer un motor eléctrico sencillo necesitas una pila AA de 1,5 V, un pequeño imán de neodimio y alambre de cobre desnudo. Al tocar simultáneamente el terminal libre de la pila y el imán con el alambre, cierras el circuito y el montaje empieza a girar. Es una demostración breve de electromagnetismo, no un motor diseñado para producir potencia útil.
Materiales para construirlo
- Una pila AA de 1,5 V.
- Un imán pequeño de neodimio, de disco o cilíndrico.
- Alambre de cobre conductor, desnudo y lo bastante flexible para doblarlo sin que pierda la forma. Science Buddies propone alambre de calibre 16; Questacon utiliza cobre estañado. El alambre esmaltado no sirve en el montaje de Questacon si el esmalte permanece en las zonas de contacto, porque el aislamiento impide que pase la corriente.
Para la variante con una pieza suspendida, añade un clavo o tornillo de hierro y un trocito de cinta o papel que sirva como marcador visual del giro.
Cómo hacer el montaje básico
- Coloca el imán en un extremo de la pila, sujeto al terminal de la base.
- Dobla el alambre para que una punta toque el terminal libre de la pila y otra toque el lateral del imán.
- Ajusta la forma hasta que ambos contactos se mantengan a la vez y el alambre quede equilibrado. Al cerrar el circuito, el alambre debería girar alrededor de la pila.
- Cuando hayas observado el giro, separa el alambre de la pila para interrumpir la corriente.
Si el alambre se tambalea, se cae o pierde uno de los contactos, retíralo y prueba una geometría distinta; no es necesario forzar la presión contra la pila o el imán.
Variante: hacer girar un clavo o tornillo suspendido
- Fija el imán a la cabeza plana del clavo o tornillo.
- Apoya la punta del clavo o tornillo sobre el terminal negativo de la pila, de modo que el conjunto quede suspendido.
- Dobla el alambre para que toque el terminal positivo de la pila y el lateral del imán al mismo tiempo.
- Observa el conjunto girar y desconecta el alambre al cabo de unos segundos.
En este diseño gira el conjunto de clavo o tornillo e imán, en lugar del alambre alrededor de la pila. El contacto del alambre y el equilibrio de la pieza suspendida pueden requerir varios ajustes pequeños.
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#1 Best Overall
Sntieecr STEM Electric Circuit Motor Kit,Science Experiment Educational Kit
- COMPLETE CIRCUIT KIT: Comes with one instructions, 5 x crocodile clip leads, 5 x bulbs, 2 x motors, 2 x motor holder, 2 x rocker switches, 3 x propeller with 3 Vanes, 3 x propeller with 4 Vanes, 1 x buzzer sounder, 1 x bulb holders, AA size battery holder (1 x 1.5V), AA size battery holder (2 x 1.5V), packaged with enough circuit accessories for you do science project easily
- SCIENCE EXPERIMENT KIT: This popular and interesting electronic science experiment STEM toys can well inspire and encourage kids learning about science. This Montessori learning toy is good for curious kids, turning your own new ideas and inventions into reality. Also perfect for Children's school science STEM engineering projects, Ideal back to school gift for curious minds
- WIDE APPLICATIONS: The circuit motor kit can well catch kids attention and let the them try to build, experiment and explore basic electrical simple circuits. It can also be used in school in science, STEM, technology and design courses, easy to meet your project needs, properly educating some circuit knowledge would be a good interaction time with your kids together
- NOTICE: It is recommended that the voltage be 1.5V-3V. If the voltage is 3V, please control the time. The use time should not be too long, and the time should be controlled within 3 minutes. After 5-10 minutes, the circuit will generate heat and a short circuit.
- WARNING: Suitable for 8+ years. CHOKING HAZARD—Small parts, not for children under 3 years. Be careful of scald caused by short circuit. Do not mix old and new batteries. Do not mix alkaline, standard (carbon-zinc), or rechargeable batteries, the kids must use under the supervision of adults
Qué cambia entre los dos diseños
| Diseño | Qué gira | Cómo se sostiene | Contacto del alambre |
|---|---|---|---|
| Montaje básico | El alambre | El propio alambre se apoya en la pila y debe quedar equilibrado. | Una punta toca el terminal libre; la otra, el lateral del imán. |
| Montaje suspendido de ANU | El clavo o tornillo junto con el imán | La punta del clavo o tornillo descansa en el terminal negativo. | El alambre conecta el terminal positivo con el lateral del imán. |
También puedes cambiar la forma o el calibre del alambre, el tamaño del imán o probar una pila en distinto estado de carga. Observa y anota qué ocurre en cada montaje; no hay base para asegurar que una forma girará siempre más rápido que otra.
Por qué gira
Cuando el alambre toca la pila y el imán, se cierra el circuito y circula corriente eléctrica. La corriente dentro del campo magnético experimenta una fuerza —la fuerza de Lorentz— que produce el giro del alambre o del conjunto suspendido. El movimiento muestra cómo la energía eléctrica se convierte en movimiento mecánico.
Rank #2
DC Motor Kit for Kids, 8 Set STEM Science Kit with Motors, Wheels & Gears
- 1. DC motor kit for kids designed for hands-on STEM learning through building, testing, and experimenting. Children can explore basic engineering concepts by using mini electric motors, battery holders, propellers, wheels, gears, and connectors to create simple working models.
- 2. This STEM science kit gives kids the parts they need for DIY experiments, school projects, classroom activities, and home learning. It can be used to build fan projects, moving models, small vehicles, and other creative science builds while encouraging curiosity and practical thinking.
- 3. Helps children understand how motors, power sources, rotating parts, and simple mechanical components work together. By building with real pieces instead of only reading theory, kids can develop problem-solving skills, observation skills, and early engineering awareness in a more direct way.
- 4. Includes mini electric motors, battery holders, fan blades, wheels, gears, and small connecting parts for a wide range of beginner DIY builds. The different components allow children to test ideas, try different structures, and enjoy the process of making and learning at the same time. For proper use, switch the battery holder OFF before connecting or changing wires, and keep the red and black wire ends separated.
- 5. A fun educational building kit for boys and girls who enjoy science, mechanics, and hands-on activities. Suitable for STEM projects, science fair preparation, parent-child building time, and beginner engineering practice, making it a thoughtful gift for curious young learners.
La Universidad Nacional Australiana (ANU) señala que Michael Faraday demostró por primera vez el motor homopolar en 1821. El montaje casero conserva el principio básico, aunque su propósito es ilustrativo y su movimiento no lo convierte en un motor práctico de potencia.
Quick Recap
Bestseller No. 4
Best Value
Solar Power STEM Kits for Kids Science Experiment Building Crafts Ages 8-12
- 【4 in 1 STEM Kit】These science kits contain a solar powered car, a solar powered fan, a wind powered car and a wooden plane. Each toy is individually packaged.Includes Magnetized Screwdriver and Detailed instructions make it much easier and convenient to assemble the models
- 【Family Stem Activities】This set of science experiments is a good way for parents and children to complete together, can also be used as a classroom STEM project
- 【Unique Gift Idea】Our stem kits designed for kids age 8-12 are cool stuff and very suitable for elementary students to show their talents in a science fair. Packaged in a beautiful gift box, these toys are great gifts for boys and girls for birthday and Christmas
- 【Easy To Assemble】Circuit connection is very simple, NO welding, suitable for kids to complete independently. Includes Magnetic Screwdriver and Detailed instructions make it much easier and convenient to assemble the models
- 【Learn By Playing】Encourage kids to build their own models and enjoy DIY science activities. By playing with these electric kit, children's curiosity and interest in physics will be stimulated, and they'll know how much fun it is to create a circuit by themselves
Rank #4
EUDAX STEM DIY Simple Electric Motor DC Motors Model Assemble Kit for School Labs Physics Science Educational
- The EUDAX DIY Simple Electric Motor Model Assemble Kit, which fully demonstrates how the motor works, is designed for electronics enthusiasts, easy to assemble and disassemble, and is ideal for learning science projects and teaching.
- The working voltage of the motor model is 1.5v-6v.It is not recommended to use 12v voltage for testing.When the power is turned on, the motor model can be rotated like a real motor.
- When you are assembled, turn on the power(Do not include battery, you need to prepare 4 AA batteries), but the motor model does not work. You can check whether the copper brush is closely touched with the rotor , rotate the rotor to drive the motor model to work.
- Come with the English manual, detailed assembly process and precautions, if you encounter any problems during assembly and use, please contact us and we will solve it for you.
Rank #3
EUDAX 6 Set DC Motors Kit, Mini Electric Hobby Motor 3V -12V 25000 RPM Strong Magnetic with Shaft Propeller, 2 x AA Battery Holder,9V Battery Clip Connector,Plastic Wheels for DIY Science Projects
- Pay attention: Please read the instructions or pictures carefully, use the correct circuit diagram to avoid short circuit, short circuit will produce high temperature and Causing accessory damage
- Shaft Propeller Aperture:2mm/0.078"; Diameter:60mm/2.36"; Number of vane:4 vane and 3 vane;colour:Red & Blue & Yellow&Green&Clear(Random Color)
- DC Motors Color:Siler+Red;Voltage:DC 3V-12V;No-load speed: 9000RPM- 25000RPM ±10%; Motor Body Diameter:27mm/1.06";Shaft Size:10x2.0mm/0.39"x0.08"(L*D);Motor Body Length;38mm/1.46"
- High torque Strong magnetic Brushed Electric 130 MOTOR, can be used for Science Educational models, DIY STEM toys, etc.. It is recommended to use a 3V battery drive to avoid high-speed operation affecting the motor life.
- Package including:6pcs DC motor,6pcs 9V Battery Clip Connector,6pcs 2 x AA Battery Holder,6pcs motor mounting bracket,6pcs boat rocker switches,12pcs x electronic wire(25cm),8pcs Plastic wheels，4pcs 2*100mm shaft,4pcs 4 vanes propeller,2pcs 3 vanes propeller and 40cmΦ3 Heat shrink tube
Seguridad y problemas comunes
- Desconecta pronto: no dejes los contactos unidos durante más que unos segundos. La pila y el alambre pueden calentarse, especialmente si el circuito sigue cerrado y el motor no gira. Deja que se enfríen antes de intentarlo de nuevo.
- Manipula el imán con cuidado: los imanes pequeños de neodimio son fuertes y pueden pellizcar los dedos; si chocan, pueden romperse o astillarse. Supervisa a los menores y manténlos fuera del alcance de niños pequeños y mascotas por el riesgo de ingestión.
- Mantén el imán lejos de tarjetas y marcapasos: sigue las precauciones indicadas por Science Buddies.
- Si no gira, revisa el circuito: confirma que el alambre desnudo toca a la vez el terminal correcto y el lateral del imán. Ajusta el equilibrio y comprueba que no haya esmalte u otro aislamiento en los puntos de contacto.
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