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Micro wind turbine (i.imgur.com)

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トップ新着論争中古い順Q&A

[–]HexKrak 42ポイント43ポイント  (10子コメント)

I bring a small solar panel that I can clip to the outside of my pack, won't fully charge my phone in a day if it's cloudy or I'm continuously using it for GPS, but most days it does great, and is super light.

That said, this is a cool design and could work better than my setup depending on the environment.

[–]illegible 22ポイント23ポイント  (8子コメント)

At least you can charge while on the move though.

[–]darlingpinky 17ポイント18ポイント  (4子コメント)

Just carry it in your hand like a flag.

[–]profbetis 18ポイント19ポイント  (3子コメント)

Slapping you in the face with every revolution

[–]monkey804 12ポイント13ポイント  (1子コメント)

Back attachment. Like warriors heading out into a battle. It'll be more epic if you have somebody with battle drum behind you for extra immersion.

[–]Black_Hipster -1ポイント0ポイント  (0子コメント)

What is this, the Middle East?

[–]LongUsername 8ポイント9ポイント  (1子コメント)

You've got 8+ hrs at night where you'd likely have wind but no sun and you'd be sitting in camp.

[–]thirtynation 2ポイント3ポイント  (0子コメント)

Not who you replied to, but I get around this by using the solar panel to keep a 20,0000 mah portable USB battery constantly charged. Power whenever needed.

[–]xelf 1ポイント2ポイント  (0子コメント)

Is there a kinetic charger available? Seems like it would be a good idea.

[–]OskeewowwowIL 5ポイント6ポイント  (0子コメント)

Plus you can charge at night and when it's overcast.

[–]deegva 147ポイント148ポイント  (3子コメント)

Can't help but picture a strong wind carrying the turbine away, while you look on helplessly as your phone is carried with it down the mountain.

[–]cheesecake1988 33ポイント34ポイント  (2子コメント)

I saw some ropes pegged into the ground in the video

[–]davvblack 14ポイント15ポイント  (1子コメント)

Hopefully it's designed so there's a failure point in the shaft weaker than the pegs, so in heavy gusts it snaps and leaves whatever you've plugged in behind.

[–]hyperdream 35ポイント36ポイント  (19子コメント)

Meaningless without power output specs.

[–]LongUsername 8ポイント9ポイント  (0子コメント)

5W with a 18km/h wind.

[–]original_4degrees 5ポイント6ポイント  (7子コメント)

we have to wait till october for those.

[–]gehzumteufel 12ポイント13ポイント  (6子コメント)

Actually you don't.

http://nilsferber.de/micro-wind-turbine/

[–]Youreahugeidiot 10ポイント11ポイント  (0子コメント)

The current design is opimized to be used for smaller USB devices and can be handled by one single person. It produces a constant output of 5 Watts at a windspeed of 18 km/h.

[–]Name0fTheUser 7ポイント8ポイント  (4子コメント)

For the lazy, they claim 1A at 5V, with a wind speed of 18km/h, which should charge most devices in a reasonable time.

[–]TommyBaseball 7ポイント8ポイント  (1子コメント)

They claim 18 km/h, which equals 5 m/s or 10 knots ot 11 mph, which is a little more reasonable.

[–]SoulWager 2ポイント3ポイント  (1子コメント)

Well, cellphones. tablets might not be so reasonable.

[–]ikahjalmr 0ポイント1ポイント  (0子コメント)

Plus phones now charge at 5V/2A, so this would feel slow to someone with a newer phone, although definitely not bad if it's stable

[–]gehzumteufel 2ポイント3ポイント  (4子コメント)

http://nilsferber.de/micro-wind-turbine/

[–]bananagrammick 4ポイント5ポイント  (3子コメント)

Thanks for digging this up. I can't believe the system is only 5w. I'm not sure what the upside of this would be over solar since solar puts out far more juice. The only thing I could think of is a camping light setup.

[–]Koldfuzion 7ポイント8ポイント  (2子コメント)

Most "camping" style solar panel setups I've seen only put out 3-8w, so you're right, it'd offer no power output advantage for the relative size.

The only real benefit I see would be power generation without good sunlight exposure. I could see this working okay running through the night to charge your device. Other than that, I'd opt for the solar panels since it doesn't have moving parts (which will inevitably break/fail).

[–]appropriate-username 3ポイント4ポイント  (1子コメント)

The answer here is obviously to make a wind turbine without moving parts.

[–]lgoolsby 1ポイント2ポイント  (1子コメント)

Everything would be speculation, but I imagine the turbine might charge a capacitor that outputs 5 volts to a charging circuit to prevent undervolting the devices. If it works on USB, that seems like a decent guess.

[–]WhichFawkes 0ポイント1ポイント  (0子コメント)

This doesn't say anything about the amperage...

[–]thisaccountisbs -2ポイント-1ポイント  (2子コメント)

And a variable output will likely ruin your battery.

[–]philmoskowitz 10ポイント11ポイント  (1子コメント)

That's not true in the least. Regulation is about the easiest thing to do in electronic design.

[–]SoulWager 0ポイント1ポイント  (0子コメント)

Though some devices might get confused about how much power they can actually draw from it, and charge slower than optimal. It would probably work best as a dedicated battery charger, not a source for USB power.

[–]LongUsername 6ポイント7ポイント  (6子コメント)

As a CPAP user one of the biggest problem with CPAPs and backpacking/rough camping is either carrying a big enough battery to last multiple nights or recharging a smaller battery. Something like this would be very interesting depending on the current output.

EDIT: the web site quotes 5 watts with a 18km/h wind. That would mean to get a night of CPAP use you'd have to charge for about 12-13 hrs. Doable if you have a fixed base camp and a good steady wind. Even if you only set it up at night if you have the wind it would extend your 2 night battery by a night or two.

[–]adaminc 0ポイント1ポイント  (5子コメント)

How does a CPAP work exactly?

Would you be able to use a compressed air tank based system with an electronic control system, instead of a battery operated air pump?

[–]crasyphreak 2ポイント3ポイント  (2子コメント)

It sets up a high pressure area in your nose/mouth in order to keep your airway open.

edit: with sleep apnea, your airway closes and you have to "exit" the current sleep cycle to open it back up, aka you wake up a little just not enough to notice it. This plays havoc with sleep since you may be unable to go through an entire sleep cycle all night.

[–]adaminc 0ポイント1ポイント  (1子コメント)

Well I know that, but how does the machine itself work.

[–]phate_exe 0ポイント1ポイント  (0子コメント)

It's a small air compressor.

[–]LongUsername 1ポイント2ポイント  (1子コメント)

CPAP is basically a big fan moving a large volume of air the entire time you're asleep. I've never seen anything using a compressed air tank.

The pressures are low but the volume is high: typical higher treatment pressure is around 14cmH2O, which translates to about 0.2 PSI. The difference is it blows 20-60L of air per minute at that pressure.

[–]adaminc 0ポイント1ポイント  (0子コメント)

Yeah, seems that a tank, even something like a large 100ci 3000psi HPA tank for paintball, wouldn't hold enough. It'd be done in about 1min.

[–]Mnementh2230 10ポイント11ポイント  (6子コメント)

Great not just for charging a phone, but also batteries for light-weight drones.

[–]Jericho85 5ポイント6ポイント  (0子コメント)

It seems like wind high enough to charge batteries would be fast enough to be problematic from lightweight drones. I guess the efficiency of the charger would be really important?

[–]florian0815 0ポイント1ポイント  (2子コメント)

I don't think you can charge a light-weight drone with 5W.

[–]Mnementh2230 2ポイント3ポイント  (0子コメント)

My Syma X5C could charge on that, battery is tiny.

[–]phate_exe 1ポイント2ポイント  (0子コメント)

One of my quadcopters charged via USB, but I wouldn't exactly call it a "Drone" since it doesn't wasn't made to carry a camera (once carrying a gopro it didn't have much/any control authority).

But it was also cheap and had low performing motors/blades.

[–]h35grga 0ポイント1ポイント  (1子コメント)

Jesus Christ I wish I was a prepper. These motherfuckers probably have basements full of surveillance and attack drones.

[–]irving47 0ポイント1ポイント  (0子コメント)

The two that I know seem to focus heavily on guns. The mantra seemed to be if they couldn't 'eat it or shoot it' they didn't want it.

[–]KZ963 46ポイント47ポイント  (24子コメント)

Charge your phone outside of civilization, where there are no cell towers...

[–]sir_fancypants 116ポイント117ポイント  (18子コメント)

Smartphones are still useful for GPS, maps, video, etc. Better than carrying a bunch of separate devices.

[–]kerbuffel 11ポイント12ポイント  (15子コメント)

Also, better than carrying paper maps since you don't have to figure out where you are on the map before figuring out where you need to go.

[–]original_4degrees 34ポイント35ポイント  (9子コメント)

being able to read a map and get bearings is always a must.

[–]Tjblackford 9ポイント10ポイント  (1子コメント)

Some people just don't know how to triangulate via reverse azmyths.

[–]whollyme 2ポイント3ポイント  (4子コメント)

If you can't read a map, you shouldn't be out where you might need one. A GPS might tell you where you are, but it can also run out of battery.

[–]Ryanisreallame 12ポイント13ポイント  (3子コメント)

I hope they come up with some kind of portable wind turbine so we can charge our devices out in the middle of nowhere.

[–]whollyme 1ポイント2ポイント  (1子コメント)

I still wouldn't want to be in the middle of nowhere without the ability to read a map. A portable wind turbine would be lovely, but there are still too many failure points for my comfort.

[–]Ryanisreallame 0ポイント1ポイント  (0子コメント)

Oh I wholeheartedly agree, having an at least basic understanding is essential.

[–]AndersLund 0ポイント1ポイント  (0子コメント)

One is being developed!

[–]WhichFawkes 7ポイント8ポイント  (1子コメント)

Actually the separate devices usually have much better battery life and phone GPSs suck.

My GPS will happily run for 24 straight hours, and my camera will take hundreds of photos on a single set of batteries... but my phone wouldn't be able to keep up with either duty for a single day. And my phone + charging gear weighs about as much as just taking the GPS + camera which will perform better.

Furthermore they both take AA batteries so I can just bring one pair as spares and never wait for anything to charge.

[–]low_altitude_sherpa 1ポイント2ポイント  (0子コメント)

I always try to justify some sort of charger.... solar/wind/stove based. And for this reason I just can't. AA's, especially Lithium last forever and are light enough that you can pack several sets for the weight of a charging setup. Unless you are going to be out for a month it is worth just carrying the batteries.

The setup shown in the clip would be good for, say, basecamp Everest. But then there are probably generators anyway.

[–]CaptainMinty 8ポイント9ポイント  (0子コメント)

You can get a satellite adapter, for example: http://www.thuraya.com/satsleeveandroid

[–]SOULJAR 3ポイント4ポイント  (0子コメント)

someone make a portable cell phone tower next pls

[–]VikingCoder 2ポイント3ポイント  (0子コメント)

There's an app for that! Google Trips

[–]vigillan388 2ポイント3ポイント  (0子コメント)

You can even get 4G at Mount Everest!

http://www.telegraph.co.uk/technology/mobile-phones/10161553/4G-coverage-on-Mount-Everest.html

[–]Cronus6 [スコア非表示]  (0子コメント)

I really could have used this after hurricane Wilma. Six weeks without electricity right in the middle of "civilization".

The only thing that did work (well it took them about a week to get them back online) was the cell towers.

(Also went a combined total of 4 weeks without electricity after hurricanes Francis and Jean...)

[–]eambos 2ポイント3ポイント  (2子コメント)

They're claiming 5W output with 18km/h consistant winds.

Assuming no losses (awful assumption), an average 2200mAh, 3.7V (~8Wh) smartphone battery would take at least 1.6 hours to charge. In reality, I imagine it would easily take 2x that, if not more.

Additionally, you'll need some electronics to ensure consistent voltage output. This will certainly drive the efficiency down.

Cool idea, but not exactly viable.

[–]littlebunnyf00foo 1ポイント2ポイント  (0子コメント)

If they are selling a wind turbine to charge cellphones, I would bet they put the requisite capacitors and voltage regulators behind the USB port.

https://en.wikipedia.org/wiki/USB#Power

Assuming lower wind speeds, they could also probably lower the output to one of the lower output specs, and charge things in low wind over night.

[–]AndersLund 0ポイント1ポイント  (0子コメント)

Assuming no losses (awful assumption), an average 2200mAh, 3.7V (~8Wh) smartphone battery would take at least 1.6 hours to charge. In reality, I imagine it would easily take 2x that, if not more.

And you sleep for 8 hours - no problem charging two phones over night.

[–]jim45804 8ポイント9ポイント  (1子コメント)

I've been waiting for a solution to my energy needs when camping on an bare, exposed mountaintop.

[–]Vekete 3ポイント4ポイント  (0子コメント)

Some people like to take pictures.

[–]anthrox 1ポイント2ポイント  (1子コメント)

now only if i had an array of these i might be able to create fire with a Galaxy Note 7

[–]Battlingdragon 0ポイント1ポイント  (0子コメント)

If you've got a lithium battery and a knife, you can have a fire. Once.

[–]phedre 1ポイント2ポイント  (0子コメント)

Please tell me they have a kickstarter or something. This is AMAZING and the perfect gift for a friend of mine.

[–]a678912 0ポイント1ポイント  (1子コメント)

I wonder if it gives a high enough charge for emergency radio? I see some speak of no cell towers, but shortwave radio might still be an option.

[–]AndersLund 0ポイント1ポイント  (0子コメント)

My thought is that there's a battery in the emergency radio and you only use it for emergencies. So no charging needed while you're on the go.

[–]Farkergud 0ポイント1ポイント  (0子コメント)

At least you can charge while on the map before figuring out where you are on the current output.

[–]tedlasman 0ポイント1ポイント  (1子コメント)

Having to take your phone or other device out in the cold for an extended time to charge it isn't that great for the batteries.

[–]AndersLund 0ポイント1ポイント  (0子コメント)

Make an extension cable that goes into your tent/sleeping bag - temperature problem solved.

[–]karlmoebius 0ポイント1ポイント  (1子コメント)

http://www.jamesdysonaward.org/projects/micro-wind-turbine/

I'm always wary of someone promising me a thing without technical specs, or hooking up a multimeter to the output under either ideal (wind tunnel) or real life conditions. But in the most ideal method, to generate the stated 5w of power, that thing's spinning at ~10hz, and I'm not seeing it spin at ~10hz. While the closest solar panels are around ~1ft x ~1ft for the same max wattage. https://www.amazon.com/Sunforce-50022-Battery-Trickle-Charger/dp/B0006JO0TC

I'm also curious if it going to be anything more than an interesting concept, I expect that in october there's going to be a delay or a problem, and the next "new release" date will be sometime middle next year.

So color me skeptical.

[–]littlebunnyf00foo 0ポイント1ポイント  (0子コメント)

without technical specs, or hooking up a multimeter to the output under either ideal (wind tunnel) or real life conditions.

The website you linked literally has photos of them testing it in a wind tunnel (at EPFL) and in real life conditions (in the Swiss Alpes).

to generate the stated 5w of power, that thing's spinning at ~10hz, and I'm not seeing it spin at ~10hz

Where did you get 10hz from? Blades don't have to spin at a certain frequency to generate electricity. You can easily see this by looking at how slow (rotationally) wind farms spin. The speed it needs is all dependent on the generator, gearing, and torque output from the blades.

While the closest solar panels are around ~1ft x ~1ft for the same max wattage

But that panel does not have the voltage regulators for a USB output. It's designed to charge 12v lead acid batteries. And it's not light enough to really backpack with, so I really wouldn't compare those two products.

So color me skeptical.

Fair enough, just don't be overly skeptical. This is not something crazy hard to produce as a working prototype, it's the manufacturing that's the issue.

[–]jabackes 0ポイント1ポイント  (1子コメント)

Is nobody else going to mention the part of the .gif that says, "A prototype has already been constructed"? I mean, no fucking duh, its in the video. What are they using if not the prototype to give an example in the video!?

[–]AndersLund 0ポイント1ポイント  (0子コメント)

It could be a mock-up for the video, that's not actually working.

[–]pm_me_your_kindwords 0ポイント1ポイント  (0子コメント)

As he plugged in the phone I couldn't help thinking "I sure hope it doesn't rain".

Seems like you'd need to bring a long enough cord to reach your tent, or have a waterproof bag for it that can let the cord through.

[–]eternal_septuagint 0ポイント1ポイント  (0子コメント)

This is neat.

[–]Brain_Beam 0ポイント1ポイント  (0子コメント)

I can plug my phone into 2 potatoes and get the charge screen to come up. Your move.

[–]HempCO719 0ポイント1ポイント  (0子コメント)

Better hide that from the govmt

[–]ryland52586 0ポイント1ポイント  (0子コメント)

Yeah but I won't get service out there.

[–]mspk7305 0ポイント1ポイント  (0子コメント)

Does anyone else have a problem with this type of animation? Like it seems to be putting emphasis on stupid things with the color variation...

[–]DoctorDeath 0ポイント1ポイント  (0子コメント)

So... what if I had like 50 of these on the roof of my house?

[–]PM_ME_SHIHTZU_PICS 0ポイント1ポイント  (0子コメント)

I feel that I could have come up with this, but my design would have been more shake weight in nature and probably less useful.

[–]BrianScissorhands 0ポイント1ポイント  (0子コメント)

Micro wind turbine seems to be a bit of an overstatement, when this much smaller wind powered generator has been on the market for years http://www.hymini.com/html/HYmini.html

[–]bradtwo 0ポイント1ポイント  (0子コメント)

Thank you for finally make this... from all of us who never leave our cubical's.

[–]skrazz 0ポイント1ポイント  (0子コメント)

Did i just watch a commercial?

[–]dummyreplicant 0ポイント1ポイント  (4子コメント)

how does it transform the kinetic energy to electricity ? I can't picture how a generator fits in there

[–]CestMoiIci 5ポイント6ポイント  (1子コメント)

Magnets and coils of wire. Just like pretty much every other generator in existence

[–]Seminal_Sound 2ポイント3ポイント  (0子コメント)

Yes, but how do magnets werk??!

[–]LongUsername 0ポイント1ポイント  (0子コメント)

A generator is just a fixed magnet DC motor run in reverse. If you take a motor, hook it to a voltmeter and spin the shaft it will generate a current and you'll read a voltage.

[–]TheNerdyOne_ 0ポイント1ポイント  (0子コメント)

A generator is just a coil of wire and a magnet, it doesn't need to be very big at all. It looks like the generator is in the larger section just below the actual "blades" of the turbine.

[–]0ttr 0ポイント1ポイント  (0子コメント)

cool... a small shut-up-and-take-my-money moment, though I think I'd prefer to build one from scratch myself.