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Jaycar wind generator

Discussion in 'Hobby Electronics' started by Trevor Wilson, May 16, 2005.

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  1. I've been thinking about putting a small renewable energy system in my home,
    for experimental purposes. Examining Jaycar's wind generator (P# KJ-6696) I
    cam across this little gem of copyrighting:

    "....It also features an on-board 330uF capacitor so you can store some of
    the energy for later use...."

    330uF? Sheesh! Should almost enough to power a digital watch for a few days.
  2. mikegw

    mikegw Guest

    Jaycar has gone down the path of wind for quite some time, usually with
    products just generating the noise.

  3. Craig Hart

    Craig Hart Guest

    I heard that many of the sales staff at DSE are full of nothing but hot air
    these days -- surely thre must be a way to harness that?
  4. Tom

    Tom Guest

    Mostly farting noise....
  5. Brad Hogan

    Brad Hogan Guest

    The word you meant to write is copy-writing.

    You actually mean technical writing.

    A copy-writer writes the advert or book based on the technical and design

    The sentence is actually technical writing, the copy writer just copied it.

    Its a joke.

    Maybe the technical writers decided the joke was to test the copy-writers...
  6. Unbeliever

    Unbeliever Guest

    You might want to look at the 200 and 400W units from Oatley

    You may need to supply your own 330uF capacitor

  7. Allan

    Allan Guest

    It must be the new SUPER caps..!!
    Power a whole house on a 330 µf Cap...

  8. **Yep. They're already on the short list.
  9. Franc Zabkar

    Franc Zabkar Guest

    Energy stored by capacitor is given by:

    E = 1/2 * C * V^2

    If this capacitor is to supply 1kW for 1 hour, then:

    1000 * 3600 = 0.5 * 330 * 10^-6 * V*V

    So V = sqrt( 10^6 * 1000 * 3600 * 2 / 330 )
    = 150kV

    A 1F supercap would require a voltage of 2.7kV.

    - Franc Zabkar
  10. Ed -|-

    Ed -|- Guest


    so a 1F cap charged to 0.75V will supply 100W motor for 1 second?

    hmm, doesn't look correct

    I'm thinking of a regenerative braking system for a electric scooter.
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