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      Joshua may be referring to microwave frequency.  I've seen an LED
      lit with that on youtube.  Much smaller antenna, too.<br>
      <br>
      On 1/24/2014 4:22 PM, Rick Osgood wrote:<br>
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      <div dir="ltr">Do you mean you can power an LED from radio waves
        like from a radio station?  I wouldn't think that would even be
        enough to power an LED but I'm not really that knowledgeable on
        the subject to be honest.
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        <div>You can charge cell phones and toothbrushes (and power
          LEDs) using inductive charging, but that's a bit different and
          it requires pretty close proximity to the charger in order to
          be efficient.  If you are talking about wearing a watch around
          all day and having it powered from the stray radio waves then
          I'm not sure.</div>
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        <br>
        <div class="gmail_quote">On Fri, Jan 24, 2014 at 4:15 PM,
          Elizabeth Phelps <span dir="ltr"><<a
              moz-do-not-send="true" href="mailto:lizphelps18@aol.com"
              target="_blank">lizphelps18@aol.com</a>></span> wrote:<br>
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            .8ex;border-left:1px #ccc solid;padding-left:1ex"><font
              color="black" face="arial"><font>Hello,<br>
                I was wondering, if you can power an LED with radio
                waves, do you think you could power a watch that way?<br>
                Thanks,<br>
                Joshua<br>
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