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German student creates electromagnetic harvester that gathers free electricity from thin air


A German student has built an electromagnetic harvester that recharges an AA battery by soaking up ambient, environmental radiation. These harvesters can gather free electricity from just about anything, including overhead power lines, coffee machines, refrigerators, or even the emissions from your WiFi router or smartphone.

This might sound a bit like hocus-pocus pseudoscience, but the underlying science is actually surprisingly sound. We are, after all, just talking about wireless power transfer — just like the smartphones that are starting to ship with wireless charging tech, and the accompanying charging pads.

Tesla ...


  • applefreak 2075 days ago

    everyone now, buys a labrador ....

  • Brian 2075 days ago

    If those little furry friends can charge my iPod touch, I'm getting one ! lol

  • applefreak 2075 days ago

    the amount of watt to light up a led is zero in comparision what is needed to charge 3 AA bateries in two houres

  • Brian 2075 days ago

    My entire apartment is LED light exclusively! When I turn on all my light in my apartment, I use less electricity than one normal 40 watt light bulb. I never worry about having the lights on when I'm not home, which makes it one of the cheapest burglar alarms out there ;)

  • applefreak 2075 days ago

    or you live in a dark room
    or there is not enough light in the rooms

    light is about the necessary amount of lux on the worktop, spreading - distance to the bulb - reflection or not - lumen of the bulb
    as a minimum for an appartment you need in old bulbs at least 12 bulbs of 60 W, 720W
    or in Led-bulbs 12 of 10W,
    there are led bulbs with a lower amount of W, but you have to install more to achieve the amount of lux

  • Brian 2075 days ago

    No there's plenty of light. As you know LEDs just use a lot less watts to create the same light. Even if you use the more powerful LEDs that compare to a '40 watt' normal light bulb in volume.

    I love the LED light, especially the 'blue / cold' LED light, which to me compare better to the light outside than the 'yellow / warm' light.

    Do you have any LEDs in your house applefreak?

  • applefreak 2074 days ago

    sunlight has all colors of the spectrum, look at a rainbow
    they try to imitate that by combining the 3 colors RGB

    so don't tell me that the blue only is the equivalent of sunlight

    like with te low energy bulbs ( fluorescent ) aging is not what we experience in the real world
    they calculate aging by lighting up and of (only one led or leb) for miliseconds in excellent ventilated conditions, and that xxx times, they measure the 'aging' in %, and calaculate from the value of this %, how long a bulb shall,give light
    but, the bulb never has warm, even no to say hot
    and let that now just be the cause of aging

    And yes, i use a lot of Leds, but lux is not what you think but what you mesures

  • Brian 2074 days ago

    Perhaps you misunderstood me applefreak.

    When we look at the light outside we don't see a rainbow of colors, we see what looks to us as a 'neutral' light. That's what I am saying the blue cold LEDs look like to me. The yellow warm LEDs (and normal light bulbs) is what we are used to having inside, but to me it does not look like the light outside as much as the blue cold LEDs.

    Yes I never really said anything about lux or lumens. I simply shared how it appears to me. And to me it doesn't really matter what someone can meassure in a laboratory somewhere. I just care about how lighting makes me feel in my home. I don't turn it up or down because the box says I should due to lux or lumens.

    I have bought a few 6 watt LEDs that broke (due to the light bulb getting to hot I think). But other than that I am very happy using LEDs. And I really enjoy that I don't have to worry about the electricity costs of LEDs.

    They are more expensive to buy, but if I spend that money on cocktails instead, I'm not going to save money on my electricity bill. So I invested the money in LEDs for my home instead ha ha.

    Some people will sit down with a calculator and actually figure out that it does not pay to invest in LEDs because of the cost compared to the savings. And then they'll go out and burn the money on something they will not save any money on ever. And they'll still think they are being 'financially intelligent'.

    I say boycot the energy saving light bulbs. Too many red flags has been raised regarding their safety and health issues. And the LEDs are way more power saving than the 'energy saving' light bulbs.

  • Joseph Barney 2074 days ago

    So this device could charge from my WiFi, radio and tv transmissions as well as the EMI from my electronics and more? Sounds good to me! Good job!

  • Brian 2074 days ago

    Yup !

    Things are really moving in the right direction for Germany since I moved here lol

  • Articulater™ 2073 days ago

    Not a new thing,they bin collecting ELE outta the air for a long time know.

    Theres just a lot more stray ELE out there know,if every one really knew

    just how much free power there is just beaming around,it would scare! you.

    technology has caught up eh! an we can know harvest power. the beginning was

    solar panel. that was one of the first harvester free of power way way back.

    A. E. Becquerel- in 1820