Speaker = Generator (version 2015)

The previous Speaker = Generator version could make 10 LED lights blink once. This one drives one hundred LED lights continuously! (continuously-to-the-eye that is. It would need some electronics in between to make it truly continuously) Here, the magnet is driven by a motor, but you could also make something similar that is driven by human power, or wind, or whatever. The speed of the rotation is sensitive though, because it has to be in sync with the resonant frequency of the speaker.

[@undercoverx9921]

Thank you, I will use this when my dad is sneezing so we could power the city.

[@mikaelafrias7786]

What are the materials?

[@dr.glsharma7409]

What things you use in this? Please tell.

[@utentecasuale6554]

isn't that using the energy of the magnet instead of the energy of the motor?

[@dasgettopikachu7878]

gonna use the energy of my screaming family

[@alenjohnxavier6806]

What speaker is this

[@kaushikprajapati7451]

what is this video edited with.

[@mikaelafrias7786]

Why cut the cone?

[@Firezz389]

is this piezoelectricity?

[@gideonjacobs3713]

Hi Giesbert. A typical clear blue LED as you used are designed to operate at around 25mA with a forward voltage of 3.3V (See Kingbright L-7113QBC-D Datasheet). Since you didn't have a resistor connected to limit the current you would not have had voltage division and looking at the brightness of the LEDs from your video you would have been close to between 20 and 25mA I guess. So, if you would have measured the voltage across your LED array which from what I can tell all LEDs were connected in parallel, you would have measured 3.3V which would be the same as across the coil. With 100 LEDs each drawing 25mA you would have generated around 2.5A at 3.3V. Calculating the produced power, P=I*V this gives 2.5*3.3=8.25Watt. Obviously the actual power developed will be lower since you only used halve wave rectification. I think it would be worth your while to measure the motor power consumption (V and I). You might have a fairly efficient little experiment with more to it than you realize. You could use low voltage schottky diodes to achieve full wave rectification (you can get ones with a forward voltage as low as 0.25V), which means you might only sacrifice around 0.5V and thus still have enough to exceed the minimum LED voltage required. Cheers, Gideon

[@BNJA5M1N3]

Monster's inc. was trying to tell us this the whole time! Scream energy man!!!

[@MongrelShark]

Now that's an interesting way to use a rotating shaft to drive a lineal generator. Nice work.

[@NeightUp]

I have read quite a few comments, and haven't seen a single person mention replacing the electric motor with a geared wind turbine, or even some kind of simple waterwheel. All you have to do is spin the magnet, the motor isn't important, it's the spin.

[@blazerunner2051]

My physics teacher teached us a little bit about generators and electro magnetic fields the last few weeks now , and I've never been so "into it" I find it so interessting! Awesome project by the way!

[@bobpattenden]

I thought this was going to be one of those "Life hack" videos but I was wrong. Absolutely amazing how much energy you generated there.

[@Libouh]

This is one of the most genius and innovative idea i have seen on youtube

[@joshvoxtor5930]

this just helped me realize a bump in my research and its going to make my school science project easier. correction it has already made my science project easier thanks alot

[@austinolaoshin]

I can see that you have gone to the fundamental theory of Faraday's Laws

[@mailomail]

Awesome experiment! Thank you very much for the demonstration.

[@nadezhdaimperial8254]

Your experiments are great. I would suggest that you include explanation for every step or process of your experiment though.