Slashdot Mirror


Hand-Powered Hardware?

quiddity writes "Following the Goofy USB Devices post, one has to know what can be self-powered when the batteries all die. You can handcrank your Gameboy, recharge your cellphone or pda (even grandpa), wind up a webserver (with minions, a beowulf..), see in the dark, and project a movie. What else can we propel through the next blackout/apocalypse?" Some of these devices have have been on Slashdot before; what cool hand-powered tech hasn't been and should be?

22 of 298 comments (clear)

  1. Masturbation by Lord_Dweomer · · Score: 5, Funny
    "You can handcrank your Gameboy, recharge your cellphone or pda (even grandpa), wind up a webserver"

    So that's what they're calling it these days...........

    --
    Buy Steampunk Clothing Online!
    1. Re:Masturbation by mvdw · · Score: 5, Funny

      We have a euphemism for masturbation around here: "Charging the Torch". Obvious, really, when you see the hand-powered torch demonstrated...

    2. Re:Masturbation by st0rmshad0w · · Score: 5, Funny

      Dude, I am NOT hand-cranking my grandpa.

  2. Universal Battery Replacement? by Rick+the+Red · · Score: 4, Insightful
    How about a universal battery replacement hand-crank generator? Then I'd just need to buy the one.

    Not an academic question -- we lost power for 5 days last December and again for 4 days last January.

    --
    If all this should have a reason, we would be the last to know.
    1. Re:Universal Battery Replacement? by benjamindees · · Score: 5, Informative
      • bicycle
      • electric motor
      • package of various resistors
      • diode(s)
      • speaker wire
      • basic electronics book/training

      There isn't much you can't power with this type of setup.
      --
      "I assumed blithely that there were no elves out there in the darkness"
    2. Re:Universal Battery Replacement? by FattMattP · · Score: 4, Insightful

      Repeated outages that last for days? If I was in your situation I'd just invest in a good gas-powered generator.

      --
      Prevent email address forgery. Publish SPF records for y
    3. Re:Universal Battery Replacement? by AdamTheBastard · · Score: 4, Interesting

      I'd add a capacitor (bank) to that list, its to hard to produce a constant cycle on a bike. When you go too fast you would generate to much power though, when you go to slow you wouldn't generate enough which gives you a very wavy ouput, not real good for DC appliences. With a capacitor you can store the power you generate when you are going fast to use up when you are going slow.

      I would also think about using voltage regulators with decent heatsinks rather than resistors, regulators tend to be more forgiving than resistors.

    4. Re:Universal Battery Replacement? by Polo · · Score: 5, Funny
      You don't need any of those things!!

      You just need a coconut shell!

      As a matter of fact, there are lots of things you can do with:
      • bamboo
      • coconuts
      • vines
      • palm fronds
      • seashells

      and of course, Some Basic Ingenuity...
    5. Re:Universal Battery Replacement? by cosmol · · Score: 4, Funny

      That's not a DC generator! You've just got two coconut halves and you're banging 'em together!

  3. Hand Power PC? by Graemee · · Score: 5, Insightful

    Say a Mini-ITX low power, embedded OS on flash with a broswer & email. Modem and Ether net. TV output for my battery powered TV.

  4. I remember... by SisyphusShrugged · · Score: 5, Interesting

    I remember reading about a device developed specifically to assist third-world countries with their crop planting and communications via a radio that is hand-cranked and provides a large amount of listening time per crank.

    Apparently these countries suffer from a lack of information about weather patterns, which would greatly assist with the crop planting, and which is provided by the hand-cranked radio

    An example of geeky inventing that actually has practial application, rare on slashdot :).

    1. Re:I remember... by jejones · · Score: 4, Interesting

      I've bought a couple of theose radios; one AM/FM, the other AM/FM/shortwave.

      The generator starts to sound like it's grinding itself to metallic powder in fairly short order. I gave away one of them, so I don't know its fate now, but the AM/FM/shortwave one sits unused. It didn't take very long for whatever governs it so that the spring doesn't immediately unwind to break, so that if you wind it up, the knob turns at amazing speed, the mechanism sounds like you should do a bad imitation of Scotty and yell "She's gonna blow for sure, Captain!", and it unwinds itself in about one white-knuckled minute.

      The radio circuitry is constrained by the power source and the need to not consume it quickly. No doubt ingle-conversion, poor image rejection. Analog dial that you can't tune with certainty, just like in the old days! The sound quality, though is very nice (which for SW means wide selectivity--ouch...).

      I hasten to add that Freeplay has some far more sophisticated radio products these days, vide the Summit receiver.

  5. How many hands? by powerpuffgirls · · Score: 4, Interesting

    Even if we have some cool hand-powered hardware, how are we going to use it properly?

    Maybe a power-generating keyboard and mouse, so the faster you type and move your mouse, the longer your hand-powered PC will stay on.

  6. Freeplay by amembleton · · Score: 4, Informative

    Freeplay are a company that specialise in wind-up electronic toys including a mobile phone charger.

    I have this radio, designed by Freeplay that has a wind-up charger and solar panel. Works on FM, MW, SW and LW with a 30 station memory. Its not bad, works well and with good sound quality. It also doesn't look dorky like some of their earlier models.

  7. Re:Hand Powered Computer by k4_pacific · · Score: 4, Funny
    Of course, with Broadband over power lines you would need a hand-cranked internet connection too.

    --
    Unknown host pong.
  8. Get paid to view porn! by Capt'n+Hector · · Score: 4, Funny

    Sell energy back to your local utility!

    --
    Quid festinatio swallonis est aetherfuga inonusti?
    Africus aut Europaeus?
  9. Hmm... by AstrumPreliator · · Score: 5, Interesting

    This is nice and all but I would much rather see a device (like your cellphone, pda, or gameboy) take advantage of the piezoelectric effect so the batteries charge when you use the device.

  10. limitation by thorgil · · Score: 4, Informative

    A well-trained human body can produce around 100 W of motion effect for a couple of hours. (bicycle style)

    So don't even think p4 ok?
    maybe an via mini-itx or something ...without display.

    --
    Warning: This sig contains a small bug. ==> *
    1. Re:limitation by Rosco+P.+Coltrane · · Score: 5, Interesting

      A well-trained human body can produce around 100 W of motion effect for a couple of hours. (bicycle style)

      Wrong: the average Jow Blow who doesn't smoke and exercise somewhat regularly puts out between 75W and 120W for 2 hours. Well trained folks can put out 200/300W, and extremely well trained people (thing Lance Armstrong rushing to the finish line) up to 1kW peak for a short time.

      The Gossamer Albatros for example, was powered by a 40Kg athlete woman who put out an average of 300/350W for more than 3 hours continuously, which explains why she was pretty knackered when she arrived.

      --
      "A door is what a dog is perpetually on the wrong side of" - Ogden Nash
  11. Someone ought to patent this idea! by The+Other+White+Meat · · Score: 4, Funny


    I think it would be really cool if someone would invent a two wheeled electric scooter, with a seat, and add pedals, so you could charge the battery. That way, instead of constantly going home to recharge, you could just hop on, turn the pedals, and ride it all day...

    --

    --- Generation X: The first generation to have SIG lines inferior to their parents... ---
  12. Hand-Cranked Generator by Doctor+Sbaitso · · Score: 4, Interesting

    For a physics assignment last year a friend and I created a hand-cranked generator using an old windshield wiper motor. It worked pretty well: we were able to power a boom box, a Game Boy Advance, a small water pump, a large light, and a few other items.

    We were thinking of selling it on the street during the blackout last summer, but decided that its nostalgic value would end up outweighing any monetary compensation we would gain.

    --

    ---
    Hello, Slashdot user. My name is Dr. Sbaitso. I am here to help you.
  13. Considering how people flail and pound on buttons by squarooticus · · Score: 5, Interesting

    when playing Gameboys and other such devices, isn't it possible just to harness all the extra energy expended beyond that which is required to tell the device, "Yes, move up, and then left, and then..."? Don't mod this up to funny: I'm serious. Think of all the energy that is wasted by just heating the plastic, when it could go into powering the device in the first place.

    --
    [ home ]