Slashdot Mirror


Boost Your Wi-Fi Signal Using Only a Beer Can

First time accepted submitter AmyVernon writes with a small hack that "is supposed to boost signal strength by at least 2 to 4 bars," and which requires little more than a can of beer (or Orangina). She writes: "What you need: scissors, a utility knife, some adhesive putty and an empty beer can. The brand doesn't matter for the router, but I suppose it would be cooler looking if it were Asahi or Stella Artois than if it were Budweiser." Perhaps this will be added one day to my favorite (and very extensive!) list of low-budget Wi-Fi amplifying rigs.

36 of 229 comments (clear)

  1. Even better... by MindPrison · · Score: 2

    ...if you have a satellite dish (which neighborhood doesn't?)
    you can just place your WiFi Dongle right in the focus area, or even various other places in front of your dish, and you'll have more hotspots than you EVER dreamed of.

    --
    What this world is coming to - is for you and me to decide.
    1. Re:Even better... by gomiam · · Score: 2

      ...as long as they are in the line of sight of the satellite dish. I haven't worked with many of them but I kind of remember they are very directional, being parabolic and all that.

    2. Re:Even better... by Fallingwater · · Score: 3

      They indeed are. Sat dishes are fantastic for leeching wifi from a location where you can see half the city, because you can *literally* reach wherever you can see, but you'll have to move the dish around a lot. And if you live in a second-floor flat you won't be doing much leeching at all. Also keep in mind that you need to keep

    3. Re:Even better... by gomiam · · Score: 5, Funny

      that you need to keep

      Someone elbowed that sat dish again, didn't they? ;)

  2. Beer booster by nacturation · · Score: 2, Funny

    The attractiveness of the opposite sex greatly increases by two to four beers.

    --
    Want to improve your Karma? Instead of "Post Anonymously", try the "Post Humously" option.
    1. Re:Beer booster by couchslug · · Score: 2

      "The attractiveness of the opposite sex greatly increases by two to four beers."

      Which begs the question of feeding THEM the beer or drinking it oneself.

      --
      "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
    2. Re:Beer booster by HornWumpus · · Score: 3, Funny

      That's an easy optimization problem.

      Drink until they look good, continue feeding them beer until they think you look good. The problems are freeloaders (people better looking then you leaching your drunk girls), being 'too drunk to fuck', running out of money, STDs, rape issues and really really fat girls running your own game against you.

      --
      John McAfee 'It was like that time I hired that Bangkok prostitute; to do my taxes, while I fucked my accountant'
  3. Re:Frist psot by NoobixCube · · Score: 2

    It's so we know who to start hating, should the need arise.

    --
    Admit it. You post strawman arguments as AC so you get modded Insightful for refuting them, rather than Troll
  4. Lameness and collateral lameness by gzipped_tar · · Score: 2, Informative

    1. This is old news.
    2. Amplified signal power in your direction == amplified noise for your neighbors in other directions.
    3. This is probably illegal in many jurisdictions.
    4. Nerds don't measure "signal strength" in "bars". Use S/N or leave /..
    5. ???
    6. Profit!!

    --
    Colorless green Cthulhu waits dreaming furiously.
    1. Re:Lameness and collateral lameness by Anonymous Coward · · Score: 5, Informative

      OTOH, amplified signal power in one direction = reduced noise for your neighbors in other directions. Granted, if you measure signal in "bars", it's safe to assume you know nothing about laying out a site for minimal interference, but for those who know and care, directional antennas of modest gain can be quite effective for making your home network work without tragedying up the commons.

    2. Re:Lameness and collateral lameness by Anonymous Coward · · Score: 3, Informative

      Obviously you're going to measure the maximum gain and adjust the power output to avoid exceeding the allowed EIRP. Then you'll still have better reception, and if the other side also uses a high-gain antenna pointed at your access point, you can each hear the other side better (because you lowered the received noise and increased the received signal), radiate less total power and create less noise for other Wifi users. That's what you're going to do, right?

    3. Re:Lameness and collateral lameness by Hatta · · Score: 4, Insightful

      2. Amplified signal power in your direction == amplified noise for your neighbors in other directions.
      3. This is probably illegal in many jurisdictions.

      This isn't amplification. It's just a reflector.

      --
      Give me Classic Slashdot or give me death!
  5. Bars by TarMil · · Score: 5, Informative

    Since when is WiFi signal strength measured in bars? It's a pressure unit.

    1. Re:Bars by Gaygirlie · · Score: 2, Interesting

      Since when is WiFi signal strength measured in bars? It's a pressure unit.

      The writer is likely a person that doesn't have much experience with WiFi technology and is only familiar with the GUI WiFi signal icon. I agree that telling some actual numbers of expect boost to signal would be more useful, but.. well, the point is that it boosts the signal reception somewhat, ignoring the point and nitpicking about the wording expresses only arrogance.

    2. Re:Bars by nacturation · · Score: 4, Funny

      My iPad displays its WiFi signal strength in kilopascals, or you can change this in the settings to display millimeters of mercury.

      --
      Want to improve your Karma? Instead of "Post Anonymously", try the "Post Humously" option.
    3. Re:Bars by pjt33 · · Score: 4, Insightful

      Asking for figures to be given with units which actually make sense indicates competence, not arrogance. The arrogance, if any, is the submitter assuming that everyone uses the same software as them (boosting by "at least 2 to 4 bars" indicates that it can boost by more, which would be quite impressive with software where 4 bars is as high as it goes), but I think it's fairer to assume ignorance than arrogance.

    4. Re:Bars by wmspider · · Score: 2

      I can make you a GUI that makes the signal go to 12 bars! Even without beer cans! http://xkcd.com/670/

    5. Re:Bars by Hognoxious · · Score: 4, Funny

      The writer is likely a person that doesn't have much experience with WiFi technology

      Or beer for that matter. I mean, Stella Artois?

      First time accepted submitter? Hopefully the last time too.

      --
      Confucius say, "Find worm in apple - bad. Find half a worm - worse."
    6. Re:Bars by Idarubicin · · Score: 4, Insightful

      Asking for figures to be given with units which actually make sense indicates competence, not arrogance....

      Not really. For the person asking the question "Will this mean I can get reliable wifi in my bedroom now?" the qualitative experience of "I'm seeing two to four more bars" is a relatively meaningful unit. The little 'bar'-type displays of wifi signal strength, or battery life, or whatever other electronic property one might wish a consumer to be aware of virtually always have between 4 and 6 bars at full scale; one doesn't have to be familiar with a particular brand or device in order to interpret a 2-to-4-bar increase as significant-but-not-magical.

      In contrast, saying "The reflector provided me with a 4 dB gain" isn't helpful to the average individual ("The router is how loud now?") and shrug-worthy to any competent electrical engineer ("Meh; that's about what I would have guessed. The gain is going to depend quite a bit on exactly how the can is placed and shaped - and on the design of my router - anyway; I'll just fiddle with mine until I get the best signal.")

      Demanding precise measurements in technically-correct units characterizing a one-off device held together with Blu-Tack isn't an indication of competence, it's an indication of arrogance and pedantry.

      --
      ~Idarubicin
  6. Other possible uses ? by alexhs · · Score: 2, Funny

    Does it work with the iPhone4 ?

    --
    I have discovered a truly marvelous proof of killer sig, which this margin is too narrow to contain.
  7. Re:Orangina comes in cans? by Joe+Jay+Bee · · Score: 2

    You can buy it in cans (certainly done so here in the UK). Why you'd want to is another matter.

  8. And if you're not a redneck... by Anonymous Coward · · Score: 4, Informative

    you could run the freeantennas.com template through your printer, cut out the bits, glue them together, slap a bit of tin foil on the back, and off you go. It really takes less than ten minutes to make one. That's an easy 8..9dB extra gain.

    The thing that's critical to beer can and paper-and-tinfoil construction is a reasonable parabolic shape and positioning the antenna at that parabole's focal point. Though a nice square angle will do too, but there again it's the focal point that does it.

  9. Re:What's cool about a run of the mill Stella Arto by Joe+Jay+Bee · · Score: 2

    In the UK it's nicknamed "Wifebeater". The premium marketing here is nothing more than a desperate ploy by InBev to link it with prestige and class, as opposed to domestic violence.

    It's not very nice lager anyway. Mind you I drink Budweiser* so who's kidding who here?

    * it's a light, refreshing lager which is ideal for summer evenings, and it's a damn sight better than some of the pisswater we have over here like Carling. That said I'd rather have Innis and Gunn all things considered.

  10. News? by nbetcher · · Score: 5, Insightful

    Haven't we known this since 802.11 came out? Pringles can, anyone?

    1. Re:News? by Anonymous Coward · · Score: 3, Interesting

      Yes, and no. If you cut up a pringles can and use it like this cut-up beer can, then yes. But the trick of the pringles can was that you could use it as a waveguide, or you could put a yagi inside it. It's pretty poor as a circular waveguide for 2.4GHz actually as it's too small; dunno about the yagi inside.

      Building a good waveguide is a bit trickier than this. It starts with most materials expecting you to do all the horrible math yourself (it boils down to two constants, eventually, after you've fed the right formulae with the right parameters through wolfram alpha) or they give rules of thumb on not enough digits in the wrong measurements system. Or they use twice-converted stuff. And that's just for knowing where to stick the probe in the side of the can. What's much harder to find is information about what size & length the probe ought to be; the one study I could find was for 10GHz and it basically said "try a lot and see what works". Anyhow. I know all this because I spent weeks trying to understand just what was going on with waveguides.

      A 1d parabola like this is far, far less complicated, and cheaper too. Print it out or cut it up and stick it over the 2dBi omni you already have. Not counting tools, a usable waveguide costs more in N-plug and pigtail already.

  11. Needs to be formed to a parabola by Peter+Simpson · · Score: 2

    It might work, but I built one of the antennas described below for my brother, and the improvement was noticeable in terms of measured signal strength. http://www.freeantennas.com/projects/template/

    So it would be better with a beer can *and* a couple of pieces of foamcore cut into parabolas...

  12. Boosting Signal is Not Always Good by Quantum_Infinity · · Score: 2

    Boosting a wi-fi signal should be done only when one is having issues due to signal strength. The signal strength should be just enough to get good connection in the radius one intends to use it in (say your apartment/house). If it goes out further than that it is actually a negative thing. The stronger the signal the further it goes out and more vulnerable your wi-fi becomes as it is broadcast over larger area. Also it causes interference with other networks which reduces quality of all the interfering networks involved.

  13. Re:What about boosting GSM/2G signal? by bemymonkey · · Score: 2

    Maybe a cell repeater with a directional antenna... might be worth it if the signal is better somewhere close to/around the house in a spot where you could safely place such a device.

    Pretty expensive though, like $250 and up...

  14. Re:What's cool about a run of the mill Stella Arto by geminidomino · · Score: 2

    Wait... You're calling something pisswater compared to Budweiser?!

    Jesus. That crap is pisswater compared to...well... water

  15. Re:"cooler" with Stella Artois ?? WTF ?? by Hognoxious · · Score: 2

    Stella Artois is a french brand and well, i'm french (sorry 'bout that, at the time, i had no say in the matter :P ).

    Hate to break it to you, but Napoleon lost. That boring bit that used to be the Spanish Netherlands is independent again.

    --
    Confucius say, "Find worm in apple - bad. Find half a worm - worse."
  16. Re:"cooler" with Stella Artois ?? WTF ?? by AtlantaSteve · · Score: 3, Funny

    Last time I checked Stella Artois was a Belgian brand.

    Yes... but why stand in the way of this kid's bizarre (and entertaining) self-hatred?

  17. Re:What's cool about a run of the mill Stella Arto by stewbacca · · Score: 2

    A little perspective please. In comparison to awful Anheiser-Bush American Piss Water lagers, Stella is a fine lager. In comparison to the fine craft-beer American Ales made by a myriad of quality brewers, Stella is indeed ordinary.

    "Premium Beer" might be a marketing term in Europe (I never saw it when I lived in England or Germany) but in the US it is code for "super-extra-piss-water". It is used by Anheiser Bush, Miller, Coors, et. al. to fool Bubbas into thinking they are drinking good beer, when they are just drinking relabeled piss water.

    Given the choice of a Stella on draught in America, or any ordinary American beer (on draught or not), Stella is indeed premium.

  18. Re:What's cool about a run of the mill Stella Arto by Anne+Thwacks · · Score: 2

    I thnk you might be confusing teh American Budweiser with the stuff that actually comes from the river Budweis in the Czech Replublic. The American stuff is in the same league with Carling.http://en.wikipedia.org/wiki/Budweiser_trademark_dispute

    --
    Sent from my ASR33 using ASCII
  19. Re:Stella Artois is not a bad beer by Kreigaffe · · Score: 2

    I guess you're not familiar with the heavily-booming US microbrewery industry.

    Once we were legally allowed to brew at home again, people started it, and some people discovered that they made some killer beer, so they went into business. There's been a trend towards more "extreme" sorts of beer, but that's subsiding -- but was and is a pretty good agent for change and the creation of new and delicious beer. The US is a little less... mired in tradition, let's say.. than European brewers. That basically means we're free to pretty much copy any kind of European beer, or create new weird and good beers.

    I (am about to sound like a hipster, but) always order a microbrew when I'm out somewhere, if one is available. It almost doesn't even matter who makes it or what sort of beer it is, they're all pretty good and some are outstanding. Though that's riskier on the west coast, they've got more microbreweries over there that have run with the whole crank-it-to-11 idea.. east coast microbrews i've found to typically be more interested in just making damn good beer without the gimmicks (but since there's fewer of them, there isn't the competition to stand out from as on the west coast. and also less hipsters..)

    --
    ... still waiting for this free-as-in-beer free beer I keep hearing about. :|
  20. Re:What's cool about a run of the mill Stella Arto by Dunbal · · Score: 2

    We do things differently down here in the tropics.

    --
    Seven puppies were harmed during the making of this post.
  21. 'Pringles' Rule OK by GerryHattrick · · Score: 2

    Contents are strange to eat, but the cylindrical foil cans with a dipole epoxied inside are great for long distances.