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Bicycle water pump + battery charge

 
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Location: Miramar, Argentina
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Hi there Bio-people!
I've made a pedal water pump, thus for filling a water tank... Quite new, don't have statistics yet, but only that 20' is not enough for pumping 500 liters... but I believe almost...
I'd like some help on how could I do to get some extra advantage of the excercise, since I have to do it anyway, in order to help charging the batteries (usually charged by solar pannel).
Thanks a lot, and here a pic of the stuff.
IMG-20160819-WA0004.jpeg
[Thumbnail for IMG-20160819-WA0004.jpeg]
Pedal water pump
 
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Location: Michigan
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You want to pedal harder? A battery will do that for you!

If you wire a 24 volt electric scooter motor to a 12v pwm charge control, and drive the motor with your sproketry, you can charge a 12v battery.

Check polarity with a meter first.

 
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Hello Manuel Munilla, first of all great work done. You can charge a 12v battery as frank li mentioned.
 
The only cure for that is hours of television radiation. And this tiny ad:
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https://www.kickstarter.com/projects/paulwheaton/free-heat
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