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Haven't you always wanted to charge your cell phone or mp3 by just putting down on your desk. Well one company named Splashpower has created a device that can do that.
It works by using electromagnetic induction. Pretty much only Faraday's Law but with an electromagnet. Also this technique is used in charging high-end toothbrushes and Splashpower Devices.
It works by using electromagnetic induction. Pretty much only Faraday's Law but with an electromagnet. Also this technique is used in charging high-end toothbrushes and Splashpower Devices.
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You are going to need these things:
1. Lots of wire. I used 18 guage wire.
2. A piece of steel that your going to wrap wire around.
3. A capacitor, one with high capacitance.
4. A diode.
5. Batteries, I used 6 nine volts.
6. A multimeter so you can see if everything works.
7. And something to make it a little easier, Alligator clips.
1. Lots of wire. I used 18 guage wire.
2. A piece of steel that your going to wrap wire around.
3. A capacitor, one with high capacitance.
4. A diode.
5. Batteries, I used 6 nine volts.
6. A multimeter so you can see if everything works.
7. And something to make it a little easier, Alligator clips.
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Inverse cube law is a good rule of thumb though.
4. 99.99% efficiency? I dont know of anything that efficient....
Tesla invented radio and modern AC Technology that we use in our houses today.
Read the Wiki article http://en.wikipedia.org/wiki/Nikola_tesla
"...keep facts straight before blearting them out... remember that your expecting people to believe you." Ditto....
Mike
KD5QLN (Amateur Radio Operator)
Well in a way they are the same thing. they are both forms of electromagnetic radiation. but saying that microwaves and radio waves are the same thing is the same as saying that light and radio waves are the same. its true that they are all forms of EM radiation but they each have a different frequency, and this is why they are not exactly the same thing, all, (almost all?) types of EM radiation can be harmful to humans if the waves are carring enough energy. we have radio waves and microwaves and light waves all arround us, but they only become dangerus when they are high energy such as the microwaves emmited from a microwave oven, or the light waves emmited from a high power laser, or high energy radio waves. the key to wireless energy isnt so much what type of EM radiation you use or its energy, its a combinatiojn of both. (as well as other more complicated factors such as evanescent wave coupeling and quantum tunneling, but thats for another disscussion.)
Here are some wiki's for ya...
"Radio frequency (RF) is a frequency or rate of oscillation within the range of about 3 Hz to 300 GHz."
http://en.wikipedia.org/wiki/Radio_frequency
"Microwaves are electromagnetic waves with wavelengths ranging from 1 m down to 1 mm, or equivalently, with frequencies between 0.3 GHz and 300 GHz."
http://en.wikipedia.org/wiki/Microwave
"Radio" Waves
" of or relating to electric currents or phenomena (as electromagnetic radiation) of frequencies between about 3000 hertz and 300 gigahertz"
http://www.merriam-webster.com/dictionary/radio
So... Microwaves are Radio Waves, Microwaves happen to have smaller wavelengths in the Radio Frequency Spectrum than say VHF or UHF.
If you would like to learn more about RF check this site out http://www.wedothat-radio.org/hello/what-is-ham-radio.php