I'll admit that I'm much weaker than I should be in ohm's law at this stage of my learning. Despite this, I'm hoping you guys could clear up something that perhaps should be more obvious.
Long story short, I'd like to make something that recharges a battery (say, 2 AA batteries) from a mini (and I mean mini) wind turbine. Like using a small hobby motor, attaching a mini-pinwheel to the shaft, and exposing it to something like a 5 MPH wind (that's all I'll be able to get).
Now, I'm not suer about the math behind figuring up how many RPM I can get the motor to turn based on a 5mph wind, but I'm going to assume with the right combination of DC motor and pinwheel I could get maybe 1.5-1.6 volts on the output.
So, if I were to make a DC to DC voltage multiplier, what should I use to figure the current capabilities of the multiplier's output?
It doesn't seem that I could multiply current from say 1.5 volts to 3 volts and then apply ohm's law to figure output current capabilities because it's only being fed 1.5 volts at the start.
Thanks for any help you can give on clearing this up.
Long story short, I'd like to make something that recharges a battery (say, 2 AA batteries) from a mini (and I mean mini) wind turbine. Like using a small hobby motor, attaching a mini-pinwheel to the shaft, and exposing it to something like a 5 MPH wind (that's all I'll be able to get).
Now, I'm not suer about the math behind figuring up how many RPM I can get the motor to turn based on a 5mph wind, but I'm going to assume with the right combination of DC motor and pinwheel I could get maybe 1.5-1.6 volts on the output.
So, if I were to make a DC to DC voltage multiplier, what should I use to figure the current capabilities of the multiplier's output?
It doesn't seem that I could multiply current from say 1.5 volts to 3 volts and then apply ohm's law to figure output current capabilities because it's only being fed 1.5 volts at the start.
Thanks for any help you can give on clearing this up.