Saturday, December 31, 2011

Live AC Wire or Neutral House Wiring Antenna

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Live wire antenna
or how to use live or neutral wire in your home as receiving antenna for long wave, medium wave, or short wave

Warning

Warning: use of this antenna is not recommended if you do not use fuse, separate antenna coil and high voltage capacitors to connect to high voltage live wire. You risk death otherwise. Be careful and use all safety precautions. Always assume that neutral wire might be live as well, if improperly wired. Even if properly wired, it can become live due to a fault.

Live wire / neutral wire antenna

I was looking through some old radio books - mostly tube designs - when it was mentioned that it's possible to use live or neutral wire in AC household wiring as receiving antenna. Of course, this is possible only with high voltage capacitor inserted between the receiver antenna terminal and live or neutral wire. AC wiring antenna solution was mentioned as some type of last resort, when no other antenna can be installed due to space constraints. Ground conductor can be used as Earth ground.

Old books recommend cold water pipe as ground connection, but I'm not sure whether this is good/practical/allowed any more. They also recommend "one good condenser" for antenna connection, not 2 in series. I guess people were braver then :)

Receiver circuit and antenna connection

I decided to test this system myself. I made a small 2-transistor medium-wave AM receiver, with headphone output. To reduce main tank circuit loading, HF is taken from a capacitive divider of variable cap and 5 nF cap. Smaller voltage drop exists on larger capacitor due to its smaller capacitive reactance Xc=1/(2*pi*f*C). Received high frequency is demodulated at the base of first transistor and then amplified as low frequency in the first and second transistor stage. Calculated frequency range: approximately 700 kHz - 2800 kHz.

To protect myself and my receiver, I decided to use two high voltage capacitors in series, antenna coil galvanically separated from remainder of circuit, and fuse. If high voltage spike is somehow able to penetrate through both 1 kV rated capacitors, it will blow open the fuse. Failing that, antenna coil (0.3 mm diameter wire, 20 turns) will burn out, with no further damage done to receiver (or user). Hopefully. :)

Simple MW AM direct receiver schematic with live wire antenna connection shown.

Coil, variable capacitor and receiver circuit. Headphones can be of low or high impedance.

Testing

Several tests were done: first with 1 m wire antenna, without ground connection. Four nearby AM stations were received, 3 were identified for testing. Latter tests were done with live wire antenna, neutral wire antenna, and power cable antenna NOT plugged into the outlet.

Connection setup with live wire (black wire) connected as antenna. Male power plug not plugged into the outlet.

DSCF0525.AVI

Video Link...
http://www.youtube.com/watch?feature=player_embedded&v=zZHjitGCBno

Testing video with live wire as antenna. Antenna is plugged into the AC outlet during the video. This changes main receiver LC circuit frequency somewhat, so re-tuning is necessary for maximum sound output. Sound is weak because it is coming from the headphones only, so weaker stations cannot be heard in the video.

Read More...
http://www.arthropodsystems.com/LiveWireAntenna/LiveWireAntenna.html

Back in the 1970's AM-FM Stereos came with a little T-Antenna. Made out of flat TV Antenna Wire. It was the Standard Antenna wiring at the time. This was before RF Cable came into wide spread use for TV Antenna wiring. Since the Flat TV Antenna wiring was not shielded. It made a pretty good little Antenna for Radios. I suppose that the T-Design was supposed to improve reception. But, I discovered that a longer piece of flat antenna wire, actually worked better. I also discovered that pretty much any type of un-shielded wire could be used for a Radio Antenna. I think that single strand copper wire works better than multi-strand wire. But, I usually just try what ever type of wire that I have available, when the need arises for better Radio Reception. The old Copper Single Stranded Telephone wire works pretty well for this purpose. I have tried different Configurations. Straight, Looped and T's. But, the thing, that makes the biggest difference, is, putting your Wire Antenna near or in a Window. I also had an actual FM Radio Antenna, back in 1976. I had moved to Wichita Falls, TX and they had No Rock n Roll Station there!:( I grew up in Azle TX, near Fort Worth and my favorite Radio Station was KZEW, "The Zew" (Zoo). An "Album Rock" Station. They played the whole songs, not the shortened "Radio Cuts". And I liked Q102 as well. It cam out just before The Zew wen out of business. I could not get any of the Dallas Rock Stations on my Home Stereo. But, sometimes I could get them on my Car Radio. Depending on where in the City that I was. It was staticky and the signal faded in and out. So, I figured there was a chance, with a better antenna. So, I bought a 10 to 15ft (don't remember the exact size now) FM Antenna at Radio Shack. It worked great!:) I was able to listen to my favorite Radio Stations on my Home Stereo!:) The signal dis degrade with Weather Changes, such as certain types of Clouds. Sometimes, the Clouds would cause other even more distant Stations to come in too. I kept that Antenna for at least 15 years. I used it as a TV Antenna, wen I moved back to Azle, a few years later. It wasn't as good for TV reception. You had to choose, to either aim it for the best VHF or UHF reception. So, I mounted it on a pole, close to a Window and would just reach out and turn it when I wanted to get a better Signal on a Certain Channel. I never did get one of those Electric Remote Antenna Turners, like I planned...

Don

Live AC Wire or Neutral House Wiring Antenna: Using mains wiring as an antenna - Hack a Day; DSCF0525.AVI - YouTube; Live wire / neutral wire receiving antenna

Programming an Arduino using an audio file and Audio Bootloader

A proof of concept that uses an Arduino to read a Korg monotribe firmware file in m4a audio format.

Introduction

TribeDuino is a proof of concept that uses an Arduino to read a Korg Monotribe audio-encoded firmware file. It doesn't do anything with the data except calculate a checksum to prove that it read it correctly. The program works by connecting an Arduino to an MP3 player of some kind via an audio patch cable, and then playing the firmware audio file so that the Arduino can hear it.

UPDATE: Want to program Arduinos with sound? See Audioino!

Background

The firmware uses frequency-shift keying, or FSK, to encode its data. In FSK, you pick a point on a sine wave (like the peak), and measure how much time elapses between peaks. Over time, variations in the peak-to-peak period represent data. The Korg firmware uses binary FSK, which means that there are only two possible period lengths. A short period is a binary one, and a long period is a binary zero.

There is a 342-short-bit gap between packets that would seem pointless for a PC that's decoding the sound file offline. But for an Arduino or Monotribe that is reading the audio stream real-time, it's a much-needed 75-millisecond break during which the device can do something interesting with the packet it just decoded, such as writing it to flash memory, without falling behind for the next packet.

The effective bitrate is very close to 2400 baud (calculated using a 33,024-byte final firmware file, 8 bits per byte, and an audio runtime of about 1:50). That figure is not entirely comparable to a real 2400-baud modem for various reasons.

Instructions

Read More and get files at sowbug/TribeDuino - GitHub...
https://github.com/sowbug/TribeDuino

Audio Bootloader

by chris on Sat Sep 03, 2011 5:17 pm

Audio Bootloader for Atmega Microcontrollers

It is possible to load a program into an AVR-microcontroller over the audio interface of a PC or laptop:
http://www.mikrocontroller.net/articles/SOUNDRX

The bootloader presented here has the following features:

- automatic Baudrate detection and calibration
- works without calibration with 8Mhz or 16MHz sysclk ( possibly 1MHz, not tested )
- very simply hardware circuit: 2 resistors and a 100nF capacitor to connect to the audio line
- only one pin for data transmission needed and an additional pin for a status led
- low memory footprint: 800 bytes
- java program to generate the sound, works on win and Linux

As line coding scheme Manchester-coding is used. With this type of coding we achieve only half the transmission speed than with "Flankenkodierung" used in Soundrxtx. Therefore the mean value of the signal is more stable and no calibration potientiometer is needed.

have fun,
chris

Attachments

AudioBoot_V1_1.zip: (172.27 KiB) Downloaded 650 times

chris: Posts: 220; Joined: Sun May 25, 2008 7:21 am

Go there...
http://www.hobby-roboter.de/forum/viewtopic.php?f=4&t=127

Cool Stuff!:) I wonder if this would work on a TI MSP-EXP430FR5739? That's all I have to work with...

Don


Programming an Arduino using an audio file: Programming an Arduino using an audio file - Hack a Day; sowbug/TribeDuino - GitHub; Program an Arduino using your sound card - Hack a Day; forum.hobby-roboter.de • View topic - Audio Bootloader; Reverse engineering a Korg Monotribe - Hack a Day; Microcontroller comm with a computer monitor - Hack a Day

Thursday, December 29, 2011

WiFi Protected Setup Flaw Can Lead to Compromise of Router PINs | threatpost

December 27, 2011, 11:59AM

WiFi Protected Setup Flaw Can Lead to Compromise of Router PINs

by Dennis Fisher

The US-CERT is warning about a vulnerability in the WiFi Protected Setup standard that reduces the number of attempts it would take an attacker to brute-force the PIN for a wireless router's setup process. The flaw results in too much information about the PIN being returned to an attacker and makes the PIN quite weak, affecting the security of millions of WiFi routers and access points.

WPS is a method for setting up a new wireless router for a home network and it includes a way for users to set up the network via an external or internal registrar. In this method, the standard requires a PIN to be used during the setup phase. The PIN often is printed somewhere on the wireless router or access point. The vulnerability discovered in WPS makes that PIN highly susceptible to brute force attempts.

"When the PIN authentication fails the access point will send an EAP-NACK message back to the client. The EAP-NACK messages are sent in a way that an attacker is able to determine if the first half of the PIN is correct. Also, the last digit of the PIN is known because it is a checksum for the PIN. This design greatly reduces the number of attempts needed to brute force the PIN. The number of attempts goes from 10⁸ to 10⁴ + 10³ which is 11,000 attempts in total," the US-CERT advisory says.

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Wednesday, December 28, 2011

Solar Tech Town - How To Build A Solar Panel

How To Build A Solar Panel

Robert explains in the video below how to build a solar panel and a solar power system easily and cheaply. Note, the video player will automatically take you to the next video in the series of videos.

Go there...
http://solartechtown.com/how-to-build-a-solar-panel/

How To Build A Solar Panel - Part 1

Video Playlist Link...
http://www.youtube.com/watch?feature=player_embedded&list=PL9D2D8C6309100460&v=a4BKuH8mqw4

Uploaded by RobertSmith3 on Jun 6, 2009

Watch in HD

http://www.solartechtown.com

I, Robert Smith, show you every step I take to building a custom made solar panel from scratch. I explain in detail about each item I use and why to use it, so the video is fairly long.

I will be hosting the majority of the video on my own server so you can view it all in one take. It will take time to edit the video, but the more of you that subscribe to the video, the faster I'll try to get it out to you guys as it just shows that people are interested and appreciate what I'm doing, as I'm providing this video for free unlike some videos you see on YouTube.

The method I described in this video is just one way to go about it, however, there are many ways you can build a custom solar panel. Some use aluminum or plastic frames, but I found for a beginner, working with wood would probably be easier and cheaper.

Overall, building a solar panel can be fun, but there are many factors that play into building a solar panel, and I as well still have an extreme amount to still learn about it.

So I hope that for those wanting to learn more about solar energy and wanting to take the adventure of building their own solar panel will find this video very useful.

To watch to full video just video, just visit: http://www.solartechtown.com

Again the video is fairly large, so to prevent from having to put 6 or 7 parts on youtube in 10 minute sections, I'm just going to host in on my server.

If you all have ANY questions, feel free to leave a comment under the video.

Thanks guys!

Category:

Howto & Style

License:

Standard YouTube License

Looks great from the Start!:) I will watch the whole Series soon... And yes, I have noticed the same problem with finding complete info on Building Solar Panels. Most of the Videos I find, just end up being Sales Pitches for some Company or individual Selling their "Best Method" for building Solar Panels. The thing, that I am interested in is, how to build the actual Solar Cells... I'm sure that there have been some advances since 2009. But then again, most really new Tech is also more expensive. So, I think, after seeing your How To Build A Solar Charged RC Electric Lawn Mower - Intro - YouTube. That this Series is definitely worth watching. So, thanks in advance Robert, for putting all of this work and effort together!:)

Don

How To Build A Solar Panel: Solar Tech Town - How To Build A Solar Panel; How To Build A Solar Panel - Part 1 - YouTube

Solar Powered Water Purification Systems: solar-powered water purification systems - Google Search; solar-powered water purification systems - Google Search; Amazon.com: Steripen Adventurer Opti Uv Water Purifier with Solar Charging Case: Sports & Outdoors: Reviews, Prices & more; catalog; solar-powered water purification systems - Google Search; YouTube - Solvaten Water System; solar powered water purification systems - Google Search; Texas Colonias Renewable Energy Projects; Solar-Powered Water Treatment; WorldWater Solar; YouTube - Solapure (Solar Powered Water Purification System); YouTube - safe drinking water from solar powered water purification systems; SECO Stimulus - American Recovery and Reinvestment Act of 2009 (ARRA); Funding and Incentives

Solar-powered bird house Tweets using B-Squares: YouTube - B-Squares Recipe: Solar Powered Wireless Tweeting Birdhouse.; B-Squares: Modular Solar Powered Electrics. by Jordan McRae — Kickstarter

Solar Energy - A Simple DIY Solar Tracker - Living on Solar: Living on Solar - How we use solar power; Solar Electricity - Our Solar Electric Home; Solar Tracking - How We Made A Solar Tracker; Reviewing last week's solar energy news : Clean Energy Authority; YouTube - Diy Solar Tracker; Solar Panel Kit - 45 Watt; Solar Tracking Video - We Made Our Own Solar Tracker

Robert's Video series shows how to build your own solar-charged R/C lawnmower

Video series shows how to build your own solar-charged R/C lawnmower - Hack a Day

How To Build A Solar Charged RC Lawn Mower | Robert's Website - Projects | Resources | Creative Works

How To Build A Solar Charged RC Electric Lawn Mower - Intro - YouTube

Robert Smith's Website - Projects | Resources | Creative Works

Robert Smith The Official Robert Smith Site | The Official Robert Smith Site

RobertSmith3's Channel - YouTube

How To Build A Solar Panel - Part 1 - YouTube

How To Build A Solar Charged RC Electric Lawn Mower

Robert Smith has put together a series of videos below that will show you how to create a solar charged remote control electric lawn mower (SCRCELM). The videos below will explain everything you need to know such as what parts to order, how to hook up components, advice, and more. After viewing a video, the video player will automatically take you to the next video in the series. So sit tight, enjoy, and let Robert guide the way.

Go there and download full Drawings and see his other Projects too...
http://www.robert-smith.net/my-projects/how-to-build-a-rc-lawn-mower/

How To Build A Solar Charged RC Electric Lawn Mower

Robert Smith explains and shows his entire process for creating a solar charged remote control electric lawn mower.

Video Playlist Link...
http://www.youtube.com/user/RobertSmith3#p/c/E60402EB48810C8F/0/xYoxCsltIqc

RobertSmith3's Channel - YouTube

How To Build A Solar Charged RC Electric Lawn Mower - Intro

From: RobertSmith3 | Nov 1, 2011 | 2,214 views

Visit http://www.RC-LawnMower.com for more details regarding this project.

All parts, documents, and other components used in the project will be listed on the website above.

If you have any questions or feedback, please post them in the comment section below.

FaceBook Fan Page: http://www.facebook.com/pages/Robert-Smithnet/23889586947...
Twitter: http://www.twitter.com/RobertSmithTalk
Website: http://www.robert-smith.net (less info)

View comments, related videos, and more

Robert did a great job on this Project and a fantastic job with the Detailed Videos and Drawings on How to Build one of your own. I think that if I built this one... It would be easy to "Tom Sawyer" my buddy Lee, into Mowing my Lawn for Free, for Ever!;) He loves RC Toys:) After I'm done playing with it, of course;)

Don

Video series shows how to build your own solar-charged R/C lawnmower: Video series shows how to build your own solar-charged R/C lawnmower - Hack a Day; How To Build A Solar Charged RC Lawn Mower | Robert's Website - Projects | Resources | Creative Works; How To Build A Solar Charged RC Electric Lawn Mower - Intro - YouTube; Robert Smith's Website - Projects | Resources | Creative Works; Robert Smith The Official Robert Smith Site | The Official Robert Smith Site; RobertSmith3's Channel - YouTube; RobertSmith3's Channel - YouTube

Sunday, December 25, 2011

Christmas Light Shows 2011

2011 - Bruce Broughton Overture 34th - Pcjulelys.dk on Vimeo

2011 - Bruce Broughton Overture 34th - Pcjulelys.dk from Pcjulelys.dk on Vimeo.

Video Link...
http://vimeo.com/34029265

Don's Favorite Christmas Light Shows on YouTube.com

Video Link...
http://www.youtube.com/playlist?list=PL95F6855EFFAA28B4

Christmas Light Shows: Skyrim Christmas Light Show, Other Amazing Holiday Displays | WebProNews; Skyrim Theme with Christmas Lights - YouTube; Heavy Metal Christmas light show - YouTube; 2011 - Bruce Broughton Overture 34th - Pcjulelys.dk on Vimeo; DonsDeals: Hacked LED and Standard Christmas Lights - Videos; Google Custom Search

Hacked LED and Standard Christmas Lights: ToddFun.com: G35 LED Christmas Light Review and Teardown - YouTube; Multiplexed, MOSFET driven, dual microprocessor controlled LED array with 1474 LED's - YouTube; Nightlights on the Canal - Cubatron - YouTube; 3D LED Mesh - The O2 Dublin - YouTube; LED Video Ball, RGB LED chandelier, LED ORB - YouTube; Hacked LED Christmas Lights - Hack a Day; MAKE | Hacking LED Christmas lights; Hacked Christmas Lights - YouTube; LED color-changing lights - YouTube; schneefall led snowfall led falling down led led schnee weihnachten - YouTube; Color Changing LED Tree - YouTube; DonsDeals: Choreographed Christmas lights - Hack a Day; Hacked LED Christmas Lights - Google Custom Search; Choreographed Christmas lights - Hack a Day; DIY Christmas Lights Set To Music - Choreographed House Lights; Sound activated christmas lights - Hack a Day; musicsyncronizedchristmaslights - rybitski; The Rybitski Christmas tree Effect - YouTube; How To Make Music Synchronized Lights - Video; Wizards In Winter Christmas Lights - YouTube; Let It Snow - YouTube; Jingle Bells Techno - YouTube; Boucher Family Christmas Lights; Boucher Family Christmas Lights − Videos; 2010 Silent Night - YouTube; 2010 disclaimer - YouTube; 2010 All I Want For Christmas - YouTube; 2010 Boucher Family Christmas Light Power Meter - YouTube; pachristmas.com - Google Search; Christmas 2009 - Wizards of Winter - Light-O-Rama - YouTube; Parallax Christmas light show - Hack a Day; Nes controller with leds lighting up the logo; nes light controller - Google Search; The force is strong with this Christmas tree light show - Hack a Day

Merry Christmas!:)

Don

Saturday, December 24, 2011

Comet Lovejoy C/2011 W3 (Lovejoy) - Wikipedia, the free encyclopedia

Video Link...

http://www.nasa.gov/multimedia/videogallery/index.html?media_id=124763581

Video Link...
http://www.nasa.gov/multimedia/videogallery/index.html?media_id=124914011

Isn't that the name of the Comment that caused the E.L.E Event in that Movie Deep Impact (1998)... Which caused the "World as we know it" to End!:O??? Oh! No, that was the Wolf - Beiderman Comet... That was my favorite Comet Movie of all:)

Don

C/2011 W3 (Lovejoy)

From Wikipedia, the free encyclopedia

Jump to: navigation, search

"Comet Lovejoy" redirects here. For other uses, see Comet Lovejoy (disambiguation).

C/2011 W3 (Lovejoy)
Discovery
Comet Lovejoy image captured by the ISS on 21-DEC-2011.
Discovered by:	Terry Lovejoy
Discovery date:	27 November 2011
Orbital characteristics ^A
Epoch:	2455900.5 (5 December 2011)
Aphelion:	92.4224 AU
Perihelion:	0.005490 AU
Semi-major axis:	46.2139 AU
Eccentricity:	0.999881
Orbital period:	314 ± 13 a^[1]
Inclination:	134.785°
Last perihelion:	16 December 2011
Next perihelion:	~2326

C/2011 W3 (Lovejoy) is a periodic comet, classified as a Kreutz Sungrazer. It was discovered on 27 November 2011, by amateur astronomer Terry Lovejoy.^[2] The comet's perihelion took it through the Sun's corona on 16 December 2011 at 00:35 UTC,^[1] as it passed approximately 140,000 kilometres (87,000 mi) above the Sun's surface.^[3] It was not expected to survive the encounter, but the Solar Dynamics Observatory (SDO), as well as other Sun-monitoring spacecraft, observed the comet emerge from the corona intact.^[4]^[5]^[6]
Before perihelion, the comet nucleus of Lovejoy was estimated to be between 100 and 200 metres (330 and 660 ft) in diameter, but after surviving perihelion it has been estimated that the nucleus was larger, as much as 500 m (1,600 ft) before the passage through the corona.^[6] At its brightest the comet had an apparent magnitude of around –4^[7] (about as bright as the planet Venus). It is the brightest sungrazing comet ever observed by SOHO,^[8] and is the brightest comet to appear since Comet McNaught of 2007, which shone at visual magnitude –5.5.^[9] However, Lovejoy was largely invisible to the naked eye during its peak brightness as a result of its small nucleus and proximity to the Sun.
The comet first became visible to the STEREO-A spacecraft on 3 December, and to the SOHO spacecraft on 14 December. Before and after Lovejoy passed through perihelion, it was the subject of observation campaigns by eighteen instruments on six satellites: STEREO-A and -B, SOHO, SDO, Hinode and PROBA2.^[7]^[10] It again became visible to ground based telescopes on 17 December.^[11] In the Southern Hemisphere, Lovejoy was a naked eye object around 21 December.^[12]

[edit] Gallery

STEREO-A close-up of Comet Lovejoy before perihelion

STEREO-A sequence of Comet Lovejoy approaching the Sun

SDO witnesses Comet Lovejoy survive the Sun's corona

[edit] See also

C/2007 E2 (Lovejoy) and C/2007 K5 (Lovejoy), other comets discovered by Lovejoy

[edit] References

^ ^a ^b "C/2011 W3 (Lovejoy)". JPL Small-Body Database Browser. NASA.gov. 14 December 2011. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C%2F2011+W3. Retrieved 15 December 2011.
^ Beatty, Kelly (6 December 2011). "Comet Lovejoy's Date With Destiny". Sky & Telescope. http://www.skyandtelescope.com/observing/highlights/Comet-Lovejoys-Date-With-Destiny-135146003.html. Retrieved 15 December 2011.
^ Malik, Tariq (16 December 2011). "Sun Rips Tail From Comet During Solar Close Encounter". Space.com. http://www.space.com/13963-comet-lovejoy-loses-tail-sun-dive.html. Retrieved 17 December 2011.
^ Wall, Mike (15 December 2011). "Satellites to Watch Comet's Death Plunge Through Sun Today". Space.com. http://www.space.com/13942-doomed-comet-lovejoy-sungrazer-sun-preview.html. Retrieved 15 December 2011.
^ Wall, Mike (15 December 2011). "Comet Lovejoy Survives Fiery Plunge Through Sun, NASA Says". Space.com. http://www.space.com/13959-doomed-comet-lovejoy-sun-encounter-wrap.html. Retrieved 15 December 2011.
^ ^a ^b Phillips, Tony (16 December 2011). "Comet Lovejoy Plunges into the Sun and Survives". Science News. NASA.gov. http://science.nasa.gov/science-news/science-at-nasa/2011/16dec_cometlovejoy/. Retrieved 16 December 2011.
^ ^a ^b Battams, Karl (15 December 2011). "The Great "Birthday Comet" of 2011, Chapter 2: Survival". Sungrazing. Navy.mil. http://sungrazer.nrl.navy.mil/index.php?p=news/birthday_comet. Retrieved 15 December 2011.
^ Battams, Karl (15 December 2011). "The Great "Birthday Comet" of 2011, Chapter 1: Inbound". Sungrazing Comets. Navy.mil. http://sungrazer.nrl.navy.mil/index.php?p=news/birthday_comet_c1. Retrieved 15 December 2011.
^ "Brightest comets seen since 1935". International Comet Quarterly. 12 February 2009. http://www.icq.eps.harvard.edu/brightest.html. Retrieved 18 December 2011.
^ "The Great "Birthday Comet" of 2011". SOHO. NASA.gov. 15 December 2011. http://sohowww.nascom.nasa.gov/pickoftheweek/old/03dec2011/. Retrieved 15 December 2011.
^ "What's Up in Space". Spaceweather.com. 17 December 2011. http://www.spaceweather.com/archive.php?view=1&day=17&month=12&year=2011. Retrieved 18 December 2011.
^ Cain, Fraser (21 December 2011). "Timelapse of Comet Lovejoy Rising by Colin Legg". Universetoday.com. http://www.universetoday.com/92016/timelapse-of-comet-lovejoy-rising-by-colin-legg. Retrieved 23 December 2011.

[edit] External links

Wikimedia Commons has media related to: C/2011 W3 (Lovejoy)

C/2011 W3 at the JPL Small-Body Database Browser
C/2011 W3 at the Minor Planet Center
C/2011 W3 on Cometography.com

Retrieved from "http://en.wikipedia.org/w/index.php?title=C/2011_W3_(Lovejoy)&oldid=467480232"

Categories:

Hidden categories:

Use dmy dates from December 2011

Go there..
http://en.wikipedia.org/wiki/C/2011_W3_(Lovejoy)

Comet Lovejoy: Comet Lovejoy brings early Christmas for crew of International Space Station | The State Column; comet lovejoy - Google Search; C/2011 W3 (Lovejoy) - Wikipedia, the free encyclopedia; File:Lovejoy-hi1a srem dec12 14.gif - Wikipedia, the free encyclopedia; Comet Lovejoy - Google Search; Comet Lovejoy Defies Death, Brushes Up to Sun and Lives; comet lovejoy - Google Search; NASA - Multimedia - Video Gallery; Mercury, crescent moon, Comet Lovejoy make the dawn sparkle | Astro Bob; Deep Impact (1998) - IMDb; Deep Impact (1998) - Plot Summary; movie ele beterman commet - Google Search

Antennas to Improve Your Wireless Connection

I found some good Pages with Templates for building WiFi Antenna Boosters for your Wireless Router. They are free, easy to make and you can make them from very inexpensive materials too!:)

Don