Yes, it does depend on the wind, but more so, it depends on what you are using to extract the power form the wind. You can ALWAYS multiple the speed of the propeller to the point of 15,000 RPM for the motor/generator.
"effect" in what way?
What is your goal for this project?
Probably it will be a small 555 timer that will produced a sound tone. I would like to use the voltage from the wind (that will change over time) to effect the tone of the circuit. An even better goal will be to also manage to power the 555 from the wind instead of 9V battery and 7805 regulator (might need to use the regulator any way if powering the 555 timer from the wind, in addition to another circuitry that will need to smooth the wind for a constant voltage for supplying voltage to the 555 timer(?))
Do you mean by that - what motor I will use?
NO, of course not. HOW are you intending to convert the wind to actual power to turn the motor????
Very easy to do, since the 555 will run on any voltage between 5 and 15V.
Make the wind generator first, and measure its output voltage and current.
In case of no wind, there is always the lemon:
1 Like
like that? How DC Motor Works as Generator? | Turn DC Motor Into Electricity Generator - YouTube
instead of turning the motor manually the wind will do so (?)
The lemon pic - is this a joke?
No.
Doesn't everyone do this experiment in Jr. High?
May I remind you of your first forum post?
That one?
No, this one: I would like to use the wind in order to generate variable voltage and use that voltage to effect other parts in the project. What shall I look for? Is there any low voltage wind turbine that outputting voltage?
It's "easier" if you just need a voltage as a signal, as opposed to generating power & energy.
i.e. You might need a battery to power the 555 or an Arduino while the generator/anemometer sends low voltage (and low current) proportional to wind speed.
I'd guess that the little inexpensive hand-held anemometers are just turning a fan with some kind of optical RPM sensor.
I want to use a generator (or a motor as a generator) you'd have to do some experiments to find a fan big-enough to turn it, and you'd have to check the voltage with a multimeter.
When the rotation of a DC generator is reversed the positive & negative terminals are reversed.
When you reverse the + & - connections to a DC motor it will run backwards.
Conventional current (1) flows from positive to negative in the circuit outside of the battery or generator. Since it's flowing in a circle/circuit that makes means it's flowing from negative to positive inside the battery/generator.
There is a "standard" water analogy where voltage is water pressure and current is water flow. The water pressure is always there but water flows only when you open the valve.
The voltage is always there at your power-outlet but current only flows when you plug something in and turn it on.
Resistance is the resistance to current flow. A skinny pipe that restricts water flow is analogous to electrical resistance.
This isn't a perfect analogy... If you cut a water pipe you have zero-resistance and water floods-out everywhere. If you cut a wire you have infinite resistance (an "open circuit") and no current flows.
With no electrical resistance you have a "short circuit", excess current flows and "bad things" can happen.
And in electrical circuits, usually something with resistance is doing some "work". It could be a light bulb or a motor or heater, etc. (But, we also use resistors for other purposes.)
Ohm's Law (Current = Voltage / Resistance) defines the relationship between Voltage, Resistance, and Current.
In most situations voltage is constant and current depends on resistance. For example the voltage at a power-outlet in your home is aways the same and the current depends on what you plug-in. If you plug-in and turn-on a 10W light bulb a little current flows. If you plug-in a hair drier and turn it on more current flows. If you plug a hair drier and toaster into the same outlet too much current flows and you blow a circuit breaker (and that turns the voltage off).
Of course, in the case of a wind-driven generator the voltage will vary with RPM and the current will be proportional to the voltage. But if we are using the voltage as a signal we don't care about the current and it can be very-low.
(1) Conventional current is kind-of a screwy concept... The electrons are actually flowing in the opposite direction from negative to positive. If you take a physics or chemistry class you'll learn that electrons flow from positive to negative. If you take an electronics class you learn that current flows from positive to negative... It's just a "concept" intended to confuse students! 
1 Like
Thanks for explaining those things. Made some subjects much clearer to me.
Yes, when we were in jr. high in 1956, nowadays it's 3rd year college.
3 Likes
What shape of voltage I should expect from that kind of action?
is it type of on off dc voltage (like a s square wave?)
or similar smooth shape like that?
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.