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Turbine to 12 V battery to USB port

Discussion in 'Power Electronics' started by gek, May 10, 2013.

  1. gek

    gek

    3
    0
    May 10, 2013
    Hello all,

    I'm a new user and I have a little bit of knowledge, which is clearly the most dangerous.


    When browsing the internet I stumbled across this: http://store.kidwind.org/wind-energ...arts-to-build-a-turbine/high-torque-generator

    It's a turbine generator. Assuming I could correctly and functionally attach this to a window box fan (which would be the blades of the turbine, run off wind into my apartment) to generate power. Would it be possible to then charge a 12 V battery which in turn could be used to charge my phone via USB?

    I'm assuming the turbine could be hooked directly to the battery to charge it. I have a breadboard and should just need the appropriate resistors/capacitors to get the right current and voltage needed for the USB port from the 12 V battery, correct?


    I hope this makes sense and I'm in the right forum!

    Best,
    Gek
     
  2. DuctDuck

    DuctDuck

    52
    0
    Jan 26, 2013
    I am not sure there is enough torque or current for you application.

    But, you can use some simple regulators to...
    -set max trickle charge to battery (<0.5A...maybe 80% to prolong dynamo/turbine life)
    -set max charging voltage to battery (1.5V>Vbattery rating)

    Batteries get hot during charge cycles (and sometimes when discharging :)).
     
  3. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    That generator you linked to says...
    You are not going to do much towards charging a phone with that, you would likely not even be able to maintain the battery when the phone is on after all is said and done...
     
  4. gek

    gek

    3
    0
    May 10, 2013
    Thanks for the posts guys! USB's are 5V at what amperage? I'll have to read into what gearing ratios can help me accomplish. This was really just a side experiment because I decided to hold off a year on a 3D printer.
     
  5. CocaCola

    CocaCola

    3,635
    5
    Apr 7, 2012
    The USB as a data port specifications calls for a range of about 500mA to 900mA...

    USB charge ports are up to or in the 5000mA top range, with most of the new smart phones wanting about 1500-1800mA for a normal 'fast' charge... They will still generally charge at the lower 500mA and up current but it will be SLOW...
     
  6. gek

    gek

    3
    0
    May 10, 2013
    thanks again! this short thread has been valuable knowledge wise. I'll likely peruse more often and come back in the future.
     
  7. glewis721

    glewis721

    49
    0
    Apr 30, 2013
    The USB port and cell phone need 5v not 12.
     
  8. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,960
    648
    May 8, 2012
    What you're describing is not charging anything via USB. Just because a cell phone uses a USB type connector to charge it doesn't make the charging source a USB source. Restated: A USB jack, plug, cable does not a USB make.

    Yes, I'm being picky about terms. :D

    Chris
     
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