Generating energy to light an led

Hi guys,

Im trying to generate energy by moving things and than light the led with the generated energy (
like dynamo) is it possible ? im very new to this stuff .

Yes, use a magnet and coil of wire. https://www.instructables.com/Shake-Flashlight-1/

A permanent magnet DC motor can be used as a generator.

Do you know where i can find tutorial ? im very new

where can i find tutorial how to make it

Click on the link.

YouTube :thinking:

Ah, sorry, I do not know of one. Just use the motor connected in place on a battery and rotate its shaft. One direction will work (in spun fast enough) as the polarity will be correct.

Unfortunately, this has very little (nothing) to do with Arduinos.

I normally wouldn’t suggest this, but instructables might be able to help you.

Please don’t use that site as a reference for Arduino knowledge.

does this also generate energy by spinning it ? https://www.amazon.nl/AZDelivery-compatibel-Helikopter-Vliegtuigen-Inclusief/dp/B07CYZSVKW/ref=asc_df_B07CYZSVKW/?tag=nlshogostdde-21&linkCode=df0&hvadid=430696587331&hvpos=&hvnetw=g&hvrand=16825315080665369583&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1010752&hvtargid=pla-673929713665&psc=1

Oh thanks! is there a way to calculate the generated energy in arduino ?

No it does not.

Oh thanks! is there a way to calculate the generated energy in arduino ?

You can even generate electricity from chemicals: use lemons and two pieces of metal (different kinds!) and you have your battery. It works to light up an LED.

Of from heat: I showed kids here at school: use thermocouples and the Seebeck-effect: it generates voltage by heat difference. Works also to light up an LED.

Dynamos = Generators (using magnets in motion) - for sure.
Any electrical motor works also as a generator.

Or: energy from light - solar panels, or even from mechanical force (piezo elements).
BTW: the most efficient way to generate electricity is from light (solar panels).

Electro-magnetic radiation (light, RF, TV broadcast towers...) is also energy and be "used".
During my childhood I lived close to an AM radio broadcast transmitter antenna: you can bring a fluorescent light bulb to glow, with just a wire as antenna.

The topic is called: "Energy Harvesting".
There are chips and solutions on market to "collect free" energy, aggregate, use it to power tiny objects or collect the energy to charge a battery or a super-cap in order to power a consumer.

It is just a question how much energy you want to "consume" (and need to generate, also the efficiency for energy conversion): an LED, with 2V voltage (e.g. as red light), with 10 mA is already pretty powerful (20 mW): you have to choose the right "source" to convert any energy into electricity.

Sources are: friction, magnets, pressure, chemical, electro-magnetic radiation (mostly light), heat.
I tried all sources and showed the kids in school.
BTW: water is not a direct source of electricity (e.g. hydropower plants) - it is "magnetism" at the end (generators).

First of all , thank you so much for your help !
i will try some thing out !

You could measure voltage of your generator over a known resistance.

P = V*V/R
Energy is then:
E = P*delta_t

Hi, @archonix
Welcome to the forum.

Google;

energy harvesting

or

joule thief

Tom.. :smiley: :+1: :coffee: :australia:

Thanks !

Correct: this is the electrical power, but related to a consumer (where you would know R).
For a generator (or source of electricity): P = U * I might be more reasonable.

Energy is the power consumed over time (correct): therefore the unit is KWh (where KW is just the power, at a certain snapshot).

When it comes to use "Energy Harvesting" in order to power an electronic circuit:
The voltage and (consumed) current matters:
If your source can generate 5V but just 0.1A when your consumer (MCU board) drains 300mA - it will not work. OK, the power is different (less power provided as consumed). But technically you would try to make sure the voltage and the provided current is enough for the "energy sink". The current is often the problem.
So, the voltage is not the problem (a piezo crystal, e.g. used for BBQ or stove ignition) provides thousands of volts), often it is the current which is not enough (voltage drops with too much current taken).

There is a model for "voltage" or "current" source: a voltage source (power supply) can provide ANY current (in a range, for sure), where the voltage remains constant. So, never mind what the current is (for a load), the voltage remains stable. But all sources of electrical energy do not behave this way: too much current - the voltage drops. Often, we need a "margin", to provide more power as really needed, just to keep both parameters in valid range. The power factor comes into play.

Never mind: he will figure it out, I am sure, what source is working for his application.

Thanks! i will try it out!