RF Harvesting – Electricity is all around us, we just need to grab it (safely).
Harvesting RF Energy to supply our electricity can be done, and has been done in the past. We only need to work together and chart the course for today and the future. Remember; “Thinking within the box is best left to those content with mediocrity.”
May 6th, 2009 at 7:44 pm
I like the intro.. Budd… but how do I grab this energy for free.
May 6th, 2009 at 8:20 pm
Patience my friend, we’ll kick this discussion into high gear very soon. Please use the RSS feed to monitor when new content is posted in this section (which we are currently testing).
May 9th, 2009 at 5:49 pm
Just out of curiosity, how much thought has gone into harnessing some of the RF energy emitted by the sun … seems to me that it just might be available 24/7 if we locate the right frequency.
May 24th, 2009 at 10:20 am
We tried out this experiment of RF harvesting in our college lab. I must say one needs to put hard work to actually make it happen. we were able to harvest about a few mW of power ( aroun 0.3 V at the output) by transmitting 20 W of power at a distance of a 5 to 7 cms. But yeah this is possible !!! but it needs a lot of R & D..
June 2nd, 2009 at 3:23 am
Re: Blocking spam comments.
Hi! I saw you comment at http://www.projecthoneypot.org/ip_89.149.253.35
This guy has been hitting three of blogs as well — I was googling his ip address, which is how I found your post.
You mentioned you were using wordpress. For a single attacker like this, which is all coming from one ip address, you can simply add the ip address to your “Comment Blacklist” (see your Settings page -> Discussion section. (In this case, simply put “89.149.253.35″ on a line by itself in the blacklist box.
For a slightly more robust anti-comment-spam solution, you can investigate “akismet” (google for “wordpress akismet” for details). It’s a bit of work to set up (I haven’t bothered yet myself), but it is touted to really be “the ticket” to block spam comments. The plugin itself should already be installed with your wordpress install, but you have to do some setup-work to get it working.
Anyway, just wanted to pass on that advice. Good luck with your blog and take care!
- Chuck
June 2nd, 2009 at 5:46 am
- Chuck
Thank you! I just implemented the solution you contributed. Your thoughtfulness has saved research time looking for a solution (which certainly seems to be a precious commodity these days). Seeing as how your line of work is an interest I pursue on an amateur basis (mostly wildlife & nature photography) I visited cdricephotography.com and enjoyed seeing your work. Thank you again for your timely advice, and welcome to the OffGridElectric.com community.
- CJA
August 9th, 2009 at 8:16 pm
Well Gramps, as we spoke of off-line relative to harnessing RF energy from the sun, it would not be as difficult as some would lead you to believe. In fact, I picked up on a study published on the NREL website that actually contained language such as “an adequately designed antenna array can efficiently absorb the entire solar spectrum, with nearly 100% efficiency
theoretically possible”. It is a very interesting read addressing solar beyond the horizon so to speak. As of this writing, the document was viewable in portable document format at: http://www.nrel.gov/docs/fy03osti/33263.pdf. Certainly a good read for anyone interested alternative energy or electricity generation. Enjoy!
August 30th, 2009 at 8:36 pm
Well, has anyone seen the design for the Lorrie Matchett “Free Energy – Static/Fequency Powered” invention dated 16 June 2008? There are multiple videos online that show his invention in action powering some Christmas lights. Well, having such a keen interest in RF Harvesting, I simply must test his design out and see how far I can get with it. Today I hand wound one of the receive elements seen in the online video. I’ll tell you what, that was rather tedious, but I was quite happy with the quality of the wind I produced. You would never know I have rhuematoid arthritis and MS judging by the quality of the wind. Though it was a bit of a painful process, it took 1 hour to complete (and that accouts for the 5 minute break I took to help the wife unload grocercies when she pulled in from shopping). I’ll try and get an image of it as soon as I can.
-DV
April 18th, 2010 at 8:17 pm
Greetings! I have been running below the radar for what seems like an eternity, but in reality…I have just plain been busy. One thing I managed to get done was successful completion of an SEI photovoltaic system design course. It was an awesome course, and worth every cent I paid for it. However, it has little to do with the topic of RF harvesting. Today I got a bit of a wild hair and decided I needed to try something I had been contemplating for months. I managed to string about 100 – 120 feet of twin lead wire in an East to West orientation over the peak of my home. Before getting it in place, I pigtailed the two leads on the one end together to effectively double the length of the wire in the span. With a one stage circuit in play (two ceramic disc capacitors, four 1n34 germanium diodes, and two 100mF 50V electrolytic capacitors), I actually managed to produce .617 VDC from it. Also got a small LED to glow red with it! Very encouraging results! – DV