Stackable Coke bottle windmill (VAWT) for bottle dynamo

by Ktronik, published

Stackable Coke bottle windmill (VAWT) for bottle dynamo by Ktronik Apr 16, 2013
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4543Views 374Downloads Found in Engineering


Real Quick and simple to make, VAWT for charging of AA batterys and USB stuff.

Print out STL and recycle or drink 6 / 2lt coke bottles, cut each in half leaving the screw neck intact. Load into coke bottles into holder and press fit onto a 6V 3W bottle dynamo, this one is made to fit a bottle dynamo I allready had.

stack them on top of each other to get the power needed, for a given wind speed.

With load matching circuits we could boost the output to around 5w.

could also make big stack, and finish with another bottle dynamo on the other end, I will make a endstop version of the block so you can have big stacks and 2 bottle dynamos. ~ 10w boosted

you could probley go down to your local bike shop, and get find a few that they have not tossed out. I did and got a crate full!! for the sake of some plastic, your 3D printer, and a few recycled bottles you can charge you AA batterys and USB stuff with the circuits I have. Electronics would be less than $5 to buy parts for a AA charger and USB charger.

I will make a hub dynamo version soon, and add the 'base' to hold common dynamos, for being driven from the coke bottle VAWT


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Updated the Cokemill to a 4 coke bottle windmill....that is press fit onto my bottle dynamos...

might need to change stack height so the width of the coke bottle, don't hit, but could stagger it a bit for less stack height needed.

more than 2 stacks, reckon you will have to run a load bearing up top, and put in a square frame.