Could be worth seeking out a few "tricks of the trade" - from the very early days; push-pull crystal sets were popular with American enthusiasts. 2 diodes and, I think 2 tuned circuits. You should also aim for all the bandwidth you can get. Years ago I won a scrap VHF communal TV amplifier, under the chassis was a spiders web of air cored coils strung between standoff posts. Each one was a different length and amounted to a whole bunch of different tuned circuits strung in series. This was done so the amplifier was more or less flat over bands I to III - they probably didn't bother to reject band II.Can you please help me in guiding how to Convert Radio waves into D.C electrical energy of 1.5 volt
Could be worth seeking out a few "tricks of the trade" - from the very early days; push-pull crystal sets were popular with American enthusiasts. 2 diodes and, I think 2 tuned circuits. You should also aim for all the bandwidth you can get. Years ago I won a scrap VHF communal TV amplifier, under the chassis was a spiders web of air cored coils strung between standoff posts. Each one was a different length and amounted to a whole bunch of different tuned circuits strung in series. This was done so the amplifier was more or less flat over bands I to III - they probably didn't bother to reject band II.
The theoretical ideal has it that an LC tuned circuit is a short to any frequency either side, but losses make the real world not so much. In essence; if you have a bunch of different LC circuits in series - the off frequency ones will present minimal losses, any LC circuits that are getting something, all add together.
Is Google broken again?can you give me more information please
Thanks
I've hard of people in the immediate vicinity of a transmitter harvesting enough energy to light their houses.It depends on what frequency or range of frequencies you want to tap into to get power from and how much power as well.
The simplest is little more than a a tuned LC tank circuit set to the frequency you want to tap into that uses one or more crystal diodes to convert the high frequency RF signal to simple DC.
There's a pile of YouTube videos on the subject with a number of them showing how people light up LED's ans what not by pulling power off their local radio, television station and other such high powered RF source carrier signals
i don't need free energyIt depends on what frequency or range of frequencies you want to tap into to get power from and how much power as well.
The simplest is little more than a a tuned LC tank circuit set to the frequency you want to tap into that uses one or more crystal diodes to convert the high frequency RF signal to simple DC.
There's a pile of YouTube videos on the subject with a number of them showing how people light up LED's ans what not by pulling power off their local radio, television station and other such high powered RF source carrier signals
Hello tcmtech... Can you elaborate that; I have before seen that comment and do not understand why tuning to a frequency instead of harvesting all the frequencies on the air ?... a tuned LC tank circuit set to the frequency you want to tap into that uses one or more crystal diodes to convert the high frequency RF signal to simple DC...
When I was a kid, a bunch of us raided the local tip - we found a skip of 8' fluorescent tubes.Use an IC and its circuit to get your 1.5V. Several options here, you should choose the most convenient for your case :
----> https://duckduckgo.com/?q=energy+harvesting+ic&t=canonical&ia=web
Drool here :
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Okay, now that explains your looks today! Mercury will do that!When we tired of the jousting tournament on our bicycles...
Why any specific frequency? Why not any and all the antenna will pick up?It depends on what frequency or range of frequencies you want to tap into to get power from and how much power as well.
The simplest is little more than a a tuned LC tank circuit set to the frequency you want to tap into that uses one or more crystal diodes to convert the high frequency RF signal to simple DC.
There's a pile of YouTube videos on the subject with a number of them showing how people light up LED's ans what not by pulling power off their local radio, television station and other such high powered RF source carrier signals
In accepted terminology - a high Q LC circuit is said to have "gain", but only at a specific frequency. You can detune it to get a wide bandwidth by shunting it with a "Q spoiler" resistor - but that clearly isn't what the TS wants.Why any specific frequency? Why not any and all the antenna will pick up?
So if the objective is to capture as much energy as possible an antenna with as broad a range as possible would be better? Like a TV antenna with multiple elements of different sizes covering VHF to UHF? Or would the voltages tend to cancel each other out?In accepted terminology - a high Q LC circuit is said to have "gain", but only at a specific frequency. You can detune it to get a wide bandwidth by shunting it with a "Q spoiler" resistor - but that clearly isn't what the TS wants.
The solution is what I said quite a few posts back - series connect multiple LC tank circuits.
Just an antenna will get you a few tens of uV - if you're lucky, and then it takes careful design to get any current whatsoever.
The antenna also has to be resonant at a frequency where some energy is - but the efficiency is so low, its pretty much a secondary concern.
Thanks for the reference. Why the different size capacitors at different stages?Pdf attached
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