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Make a Generator

Alright so here is what I am looking for. I need a small generator that could fit inside of a box-fan. I've seen things about stepper motors and all but I need the absolute most simple generator you can come up with. I'm no electrician and I don't own a soldering iron, can anyone help?

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110100101108 years ago
I read somewhere that single phase AC (magnet-less) motors can make electricity too with an 'echo capacitor' connected. I plan trying that but dont know now if it works Try large diameter computer fans too (remove the electronics inside and connect diodes from 2 coils to + and - )
I would like to learn more of this 'echo capacitor'! I f you could pass along a link, it would be greatly appreciated.
i think its it

http://users.aber.ac.uk/iri/WIND/TECH/MISC/MotorsAsGenerators.html

there was something else with better explanation and graphics but i cant find it
Thank you. I took a quick look and I will return to figure it out. If you do ever find the other site, please do send it my way. I have a feeling this will be yet another discussion on this site! If it already has been, someone please send me that way....
olddawg8 years ago
Check these people out.http://www.motorwavegroup.com/new/motorwind/index.html
I've been experimenting with low wind basic type wind turbines and I like what they are doing.
They are making what I concluded I needed to do.

They're pricing is still a bit high, but they are supposed to come out with a kit that should be affordable.
ry259208 years ago
Uh, any dc motor can be a generator.
Big Bwana8 years ago
What are you going to use this generator for ?? if it's for some thing like a science fair, a stepper motor and a few LED's are are the easiest way (( honestly if the motor has a plug in connector on it you don't even need a soldering iron )) So some more info would really help
reedz (author)  Big Bwana8 years ago
I'm looking to make a portable wind generator out of it. It is for a huge summer project that I am working on. For now I just need something that could fit in a cage for a box fan and that could possibly charge a car battery.
Big Bwana reedz8 years ago
The easyest way would be to find a small DC motor and a blocking diode and connect it to your fan, but the simplest is not aways the most efficient.. So I'll let you know what your looking at some thing that size your only going to get about 15 watts out of it and your going to need at least a +12 mph wind... and a car battery is about 70 Amp hour, so if it's dead your going to need like two to three days to charge it.... And what are you running of your battery, an electric fencer ? an inverter and TV ? a portable coleman cooler full of cold ones ??
You forgot Betz limit, he can only get 7 watts out of a box fan at 12 mph and that's before losses.
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