power generation

involved in mini project and striving hard to generate power from the manual motion of sewing machine-

Great. Let me know. Am consultant to Ministry of Energy and interested in buying this power from you. Lots of ladies here in Pakistan and lots of lots of tailors with sewing machines(thousands n thousands) . If I hook them up together will be able to get the shortfall of 1500MW required.

thanx for your offer but actually its just a beginning stage but i dun see u r serious ...! if u dunno really whats r realm of making it whats d fun of it asking u..isn't it!gentleman?

If it is a crank handle model you can fix a broom to their elbows and they can sweep the floor at the same time. You can sell the saved power as well.

What about putting a fan on the handle - This will save the power of the fan - and hence power generated - the intermittent operation doesn't matter since you should get the fruit of labour while at it

As the other posters have humorously indicated, this attempt seems impractical, but the underlying question is of considerable interest. That is, how does one generate a substantial amount of continuous power from a set of small discontinuous power sources.

What is needed is a way to sum up the individual contributions, and store the energy that is generated until it is needed. There are probably many ways to do that; the following is, I believe, the most efficient.

Each individual source could have its own dc generator, and each dc power source could diode "OR" (logical or) into a large storage medium, battery or capacitor, depending upon amount of power generated, which would then act as a source for a dc to ac power inverter. That is likely the most practical and efficient means to do it.

If you are not electrical, "diode OR" means a diode is inserted between each individual source and the storage enter. When the individual source is running at an output potential that is more the storage potential plus the diode drop (~0.7 Volts), the diode turns on and the individual power source contributes current towards charging the storage medium. When the individual source potential drops below that value, the diode turns off and the source is disconnected from the storage medium and does not drain it. This is also called a steering diode.

There other mechanical means that harken back to pre-electrical distribution days, but they would be much less efficient, both in terms of power out vs. power in, and also complexity of power distribution.

Dumb question but what sort of flywheel are you using?