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    In this wind powered battery charger circuit the dc motor is used as a generator. The voltage output is proportional to its rpm. The LTC1042 monitors the voltage output and provides the following control function.

    1. if the voltage output is below 13.8V, the control circuit is active and the NiCad battery is charging through the LM334 current source. The lead-acid battery is not being charged.
    2. if the voltage output is between 13.8V and 15.1V, the 12V lead-acid battery is being charged at about 1-amp/hour rate (limited by the power FET).
    3. if generator voltage exceeds 15.1V (a condition caused by excessive wind speed or when the 12V battery is fully charged), the a fixed load is connected, which limits the generator rpm to prevent damage.

    This wind powered charger can be used as a remote source of power where wind energy is plentiful, such as on sailboats or at remote radio repeater sites. Unlike solar-powered panels, this system will function in bad weather and at night.

    Battery Charger Schematic using wind energy

    wind powered battery charger circuit schematic

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    17 Responses to "Wind Powered Battery Charger"

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    1. OKaaaay then ! ya say a DC motor,,,right? wonder, hmmm if a 12 volt automotive starter motor minus the bendix would work,,,someone out there KNOWS,,, let us know!

      • I don’t think so. The 12V generator in the circuit schematics is expensive generator for ‘wind generator’. If you use 12V startor motor, you’ve got a very very small electronic.

    2. The schematic doesn’t show it but I think that the top side of the 4.5v NiCad, top side of the 215k and top side of the 100k should all be connected to the bottom side of the LM334. Otherwise how would the NiCad charge or the LTC1042 get its power?

    3. wow! its GOOD can you give more information hoe this project can be implemented and what will be cost and how much time it will take for charging battery?

    4. how to change from the wind battery charger to wind powered 20 LED diode? what part should i change??

    5. Wisconsin Dave says: on January 16, 2012 at 10:47 pm

      Just remember….how many rpm does it take to turn a starter motor?? Use a motor from a thread mill…People are throwing them out all over.
      Yhese motors range from 40 volts to 100 volts.
      You want a motor that turns very fast at a slow speed so in a 5 mph wind you an get electricity.
      Check out other power.com TONS of ideas here as well.

    6. wow! its GOOD can you give more information how this project can be implemented and what will be cost and how much time it will take for charging battery?how to change from the wind battery charger to wind powered 20 LED diode? what part should i change??can we implement this while travelling on a vehicle because we will get more amount of wind energy. Can we charge the battery of a vehicle using this

    7. Bryan Donkin says: on October 8, 2012 at 11:47 am

      I am just starting to think about how to charge a leisure when camping. Any hints gratefully accepted.

    8. how this circuit changes for 1.5v output and 4 v requirement?

    9. abomiral says: on March 4, 2013 at 1:13 pm

      hello actually , i`ll do iphone charger using wind power the component that i `ve used are : (1)small fan ,( 1)stepper motor 12v,(2) bridge rectifir , (2)capcitor 100 micro farad ,voltage recgulator 7805, voltage divider usb port consist (100kohm,150kohm,50kohm,50kohm) i`ve bulit the circuit and the output voltage its ok 5v but the current is 10mA low should be 1A . how can improve the current to be 1A please can any one help me to solve this matter. kind regard

    10. CAN YOU PLEASE ELABORATE THIS CKT.

    11. IN THIS CKT ONE PORT OF WIND MOTOR CONNECTED TO GROUND HOW IS THIS POSSIBLE

    12. Electricsaver1200 says: on March 30, 2014 at 9:07 am

      Thank you for showing the blue print, I really need this, I was planning on putting up wind turbine but not sure how the wiring goes so thank you for this information..

    13. what is LTC1042??

    14. Faustino says: on May 22, 2014 at 9:36 am

      I think the admin of tis webssite is actually working hard in support of his website, as hewre every information is quality based material.

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