earth battery powered joule thief

Discussion in 'The Projects Forum' started by electro01, Feb 19, 2013.

  1. electro01

    Thread Starter New Member

    Jan 14, 2013
    I have constructed an earth battery and a joule thief which seems to fire up the Jt. My earth battery ouput is around .8vdc. My Jt. lights up with a
    unbelievable voltage of around .5vdc with a LARGE led. Can I feed a
    voltage doubler with the Jt? I messed up my earlier post with insufficient
    details. Sorry. I would like to pick up the voltage to about 1.85 volts with
    this approach but unsure which diodes and caps to pick for my voltage
    doubler. Is this even possible? I need about 1 amp @ 1.85 volts if
    possible. What do you think? I am trying to understand this stuff the best
    I can and need a little help if you can. Thanks so much... This is a hugely
    important project for everybody. I plan to post schematics when finished.
    It's amazing what all you can do with a measly 1.85 volts!!
  2. t06afre

    AAC Fanatic!

    May 11, 2009
    It is Ok to want to explore. But to be honest. I think you are on path that will lead you into nothing. You can not create energy out of nothing. But that is what you are trying to do here.
  3. wayneh


    Sep 9, 2010
    Well, this isn't over-unity. It's quite real, if impractical. Could be fun for a science fair project though. It is NOT "a hugely
    important project for everybody".
  4. #12


    Nov 30, 2010
    Make 2 earth batteries and put them in series to get 1.6 volts?
    Use really large metal plates to get a whole amp of current.
    You can't amplify amps without losing voltage proportionately.
  5. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
    An amp is a lot of current.

    You actually are building an "Earth Cell", not a battery. You need to add more plates for it to be a battery.

    You could do better with a bunch of potato cells in series/parallel, and the result would be much more portable. Need zinc and copper for electrodes.

    Series (connecting + of one to - of next) increases voltage.
    Parallel (Connecting + to + and - to - of each) increases current.

    Putting 3 in series and maybe 50 in parallel (150 total) might get you close. The world record for potato battery voltage is 583.1 Volts @ a few mA. Made with 1,000 Velox variety potatoes.