earth battery to be powered by joule thief

Discussion in 'General Electronics Chat' started by electro01, Feb 18, 2013.

  1. electro01

    Thread Starter New Member

    Jan 14, 2013
    I made a nice joule thief over the weekend and the earth battery I am
    working on lights up an led with voltages from the battery at about .8vdc.
    I tried to construct a voltage doubler to boost the voltage but using IN4001 diodes and 25v 2200uf caps didn't even boost enough power
    to register an increase on the vom. Testing the booster from a power
    supply Vin at 2.vdc direct got me nowhere. What the heck did I do wrong?
    Am I thinking incorrectly about this approach? Is there another booster
    circuit which might give this ole man better results?
    Please advise.
    Last edited: Feb 18, 2013
  2. ErnieM

    AAC Fanatic!

    Apr 24, 2011
    There ain't no such thing as a power booster.

    You can't even get out what you put in.

    That said, no advice can be given for a circuit not presented. Post your schematic if you want advise.
  3. Brownout

    Well-Known Member

    Jan 10, 2012
    Your diode is probably too slow for a doubler at the frequency your joule thief is working at. J/T usually work at KHZ and 4001 works at frequencies much lower. And you cap is wrong. Use fast diodes and small ceramic caps, and sure post a schematic.
    electro01 likes this.
  4. gsgkill

    New Member

    Feb 19, 2013
    Probably not enough current to charge the cap, 2200uf would be a good filter for 1 to 2 amp power supply. try 10uf
    electro01 likes this.
  5. tinamishra

    New Member

    Dec 1, 2012
    An Earth battery is a pair of electrodes made of two dissimilar metals, such as iron and copper, which are buried in the soil or immersed in the sea. Earth batteries act as water activated batteries and if the plates are sufficiently far apart, they can tap telluric currents. Earth batteries are sometimes referred to as Telluric power sources and Telluric generators.
  6. Brownout

    Well-Known Member

    Jan 10, 2012
    Most higher frequency doublers I've seen use .1uF and smaller caps.
    electro01 likes this.
  7. Externet

    AAC Fanatic!

    Nov 29, 2005
    :confused: What powers what ?

    The earth battery feeds the Joule thief that turns on the led ? That is not what the subject title says !

    If the led turns on; what else do you want to achieve ?