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RFlagg (Member Profile)

"Stupidity of American Voter," critical to passing Obamacare

BoneRemake says...

Hey people, I had figured some of you might be interested in how your pitch fork's are made. It is interesting to know how your tools are made. *Now stick'em up your ass. *


Nixie: Wearable Camera That Can Fly

My_design says...

From the interwebs:
"Nixie isn’t going to be on this Christmas’ shopping list and is simply a concept at this stage."
and
"The Nixie prototype, as it is now, looks like it could break at a moment’s notice, and resembles more a school science project than the next big wearable."
and
"Nixie is currently in prototype stage and as an idea, was born only ten days before the deadline for the competition. But despite having a lot of work to do, the team's pitch convinced the judges not only that the product is brilliant, but that the team has a viable business plan and can make the product, quite literally, take off. Prize money will be used for improving the propellers, motors and object navigation, as well as miniaturisation of the whole product."

I still think Intel got conned.

What this tells me is that everybody sees potential but that what they showed in the video was pure concept design. They have a very long road ahead of them still. My key issues are and remain:
Getting the booms to bend around the wrist so as to bring the motor pods back together.
Fitting the electronics into a format that will fit onto a wrist.
Maintain an acceptable level of performance for an acceptable level of time.

Funny thing is that they mention all of the things I've commented on:
Propellers, miniaturization, and navigation.

I would add form factor and battery life. But Props will be a key issue as getting efficient props at this size is very difficult and maintain tolerances in production.

newtboy said:

These competitions never give out cash prizes for theory, they only pay off for actual working prototypes. Otherwise SpaceX would be a movie, as would Deepflight and whatever they called the solar plane...along with dozens of other technologies that have come from these competitions. They just don't pay off on these competitions unless you can PROVE you solved the problems (known AND unknown) and MADE at least one prototype that works.
Intel is no dummy. They know full well you can use their own product to create a video showing anything you wish, so they would NOT be 'conned' out of $500000 with a video. That's a silly thing to say.
I'll come back and tell you that you seem to be wrong today. :-)

EDIT: Don't get me wrong, you may be right it will take 5 years to make them cheap and durable enough to sell them.

Old man shows some major skills!

Excalibur artillery shell

Nixie: Wearable Camera That Can Fly

My_design says...

The slap bands don't work because the arms are at angles to each other. Slap bands can only rotate in a straight direction (They are basically tape measure metal), so they wouldn't be able to come back to meet in the center like they illustrate. Also they have the motors all prettily lined up and facing directly off the wrist, that would require the material to be able to twist.

For the rotor size, these are fixed pitch rotors. You can change the pitch of the rotor to give you different flight characteristics and in general you have to match the pitch to the motor to be the most efficient. I may have this reversed, but a lower pitch prop gives you more torque and less overall speed, but a higher pitch prop gives more top speed, less torque. Making a prop that can be injection molded at that size that even works is difficult, making one that is super efficient would be even more so. QC would have to be incredibly exacting. As a gauge, the 2" x 2" quad has 1" props. They can lift it and buzz it around pretty well. Those things were a pain to get correct and I have a hard time imagining anyone making them more efficient than they are. In the case of the 2" quad, we didn't even paint the body because we want to limit the impact on flight time from added weight. All molded in color. That's how sensitive these things can be. There are better motors if you are willing to pay, but even then it may not be enough.
Go Pro records in HD, but doesn't actually broadcast anything (plus it is big enough to keep this thing from flying anywhere). If you want to broadcast video you have to do it in 640x480 tops. To do that you need something like an FPV system that broadcasts on a spread spectrum. If you went bluetooth you have an effect range that is pretty small. Wifi requires more power to get a longer range. A video transmitter system would require a separate device to attach to your phone to receive the signal and translate it to a PPM signal for through the headphone jack. But a VTX is pretty heavy as well.
And things may drain just a little bit of power, but it stacks up. At most you have a 250mAh Lipo battery that can fit in there. That isn't going to buy you a bunch of flight/video time.
Video on the phone is going to be subject to interference, so you would want to record on the quad. this would get you HD quality, but also adds weight, which means more battery draw, which means less flight time.
-B

newtboy said:

I don't understand, why would they have to bend in multiple directions? it seems they need to be straight or curve in one direction. Did I miss something?
I'm estimating the size, about 6" around one's wrist makes it 6" 'wide', and near 3" 'long'...yes the blades seem about 1.25" diameter. You would know more than I about that being enough, but I do know there are different prop configurations for different applications, perhaps they have an ultra efficient prop and motor pair? There are certainly more powerful motors available, if you're willing to pay for them.
Adding blue tooth is minimal in weight and power drain, and the lag shouldn't be an issue in most applications (I wouldn't try making it run a gauntlet of obstacles though).
Camera batteries are pretty powerful today, allow fast drain, and come in small sizes. Maybe not enough yet, commercially available, but certainly possible to make...if you're willing to pay.

For your issues....
1)super thin spring steel could work, but wouldn't look like the plastic they showed. What's the issue with 'slap bands'? They seem perfect.
2) power is an issue, as is flight time. I feel like early adopters would sacrifice flight/record time for the advantage of size...but only time will tell.
3) object avoidance IS an issue. Likely the solution is to limit it to use where there's no obstruction above it and not too much in front. Slight lag isn't an issue, if it's not moving fast. Return to the object it's centered on should be no problem, it tracks an object to film it, it shouldn't be too hard to return to it. Now, catching it while hanging on a cliff....yeah...that's tough.
4)Does not Go-pro already wirelessly send it's video in real time "HD"? They cost under $400.

I'll agree with you, you would be MUCH better off buying a larger one that works NOW instead of sending money in hopes they come out with this super miniature one. That said, I still think this is possible...just expensive and difficult to make work.

John Cleese on Stupidity

soulmonarch says...

What I find fascinating about the Dunning-Kruger Effect is that it implies that the root cause of an individual's stupidity (their lack of talent in a particular field) is due primarily to their refusal to acknowledge their own incompetence, rather than any particular lack of ability itself.

Which is to say: If one can not hear that they are singing out of tune, they do not see the need to correct their pitch in order to improve their singing. As far as they are concerned, they sound wonderful!

It's actually a pretty horrifying conclusion. ><

Nicolas Prost sends Nick Heidfeld into a violent crash

EMPIRE says...

it's not silent. It's actually louder than a regular car. But it's not a combustion engine sound obviously. It's that high pitch noise of an electric engine.

edit: by regular car, I mean a road car. not a formula 1 car.

Squadron of Pelicans Dive-bombing for Fish!

Awesome viola cover of Sia's "Chandelier" by Jeremy Green

thorglen says...

there not violin strings... most violin string are to short to string onto a viola. and given the range of pitches he is using there would be no point. if you want to play higher pitches you can your hand up towards the body of viola/violin. what your hearing is him playing in 3rd or 4th pos. on the A string which gives him the same range of pitch a violin would have with the left hand at the end of the neck on an e string in 1st pos. The range of the two overlaps in this way with the exception of the 5 lowest notes a viola can play and the 5 highest a violin can.

Fish ladder, Smish ladder---

newtboy says...

I saw this on the news last night, but like here, they never showed the propulsion method. It looked way too much like a baseball pitching machine for me to be comfortable with this yet.

"Weird Al" Yankovic - Mission Statement

Dude does an impressive girls voice

scottishmartialarts says...

This sort of thing is just a function of knowing what components of vocal tone you can manipulate, how to manipulate them, and engaging in careful, recorded practice until you can routinely reproduce the correct mix. Some vocal strengthening also has to occur over time, much like a singer gradually extending his or her range. The average female voice is only an octave higher in pitch than the average male voice, i.e. a pitch which with practice can easily be reached and maintained by nearly all men. The bigger problem is that men's voices are far more resonant, i.e. rumbly and full, than women's voices. What a man would need to do to reproduce a "girl voice" would be to raise his pitch, and then partially pinch his upper throat and palate, while simultaneously keeping a relaxed throat through which breath can easily flow. If you just pinch the throat without raising pitch, you sound like a nasally drag queen. If you raise the pitch and overly pinch the throat, then you get an artificially thin voice. Merely raising the pitch would just sound like a guy whose voice didn't deepen terribly.

Finally, all of the above would just produce female tone. Much of what we identify as "female" about a voice, isn't tone, but cadence, word choice, and inflection.

Shania Twain murders AC/DC

digitalbombdog says...

I don't think that's auto-tune. You can still hear Shania's voice in that. I think what you're hearing is a backup singer who's at just the right pitch to combine with Twain's voice to sound like it's auto-tuned. Having said that, though, I can't say for sure because I could only listen to it for so long before I had to stop the video.

How to read music - Tim Hansen



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