My thoughts about sub-ohm and latest VV/VW devices...

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dr g

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Considering all the information you've provided I'll admit I'm intrigued. Call me a skeptic, but I still just can't see this being the phenomenal leap ahead you indicate it will be. That's not to say you're wrong, or that it won't be, I'm just having a hard time seeing it. At least right at the moment... With improvements in the technology and applying what has already been stated in this thread, then yes it has a possibility....

BUT... here's where my skepticism comes in....The only way they can calculate the temperature of the coil would be using the resistance variance as the coil heats up. That means their temperature reading is going to be an "average" of the entire coil...

So let's say I set this device for 400 degrees.... Ok great... and in a perfect world I set my power levels and with perfect wicking let's say it's hitting 340 degrees (let's say that's the boiling point of my juice).

The juice starts to run dry, the so the temperature increases... Now my coil is hitting 400 degrees... as you say, my vapor production has been reduced, but my rayon is safe and sound...

In this case, wonderful... everything has worked as expected... and I'm a happy and "safe" vaper....

But suppose as you said something happens and a small portion of my coil no longer has wick in contact with it... I get a hot spot in one of my dual large surface area coils...

Maybe the temperature in that small section has skyrocketed to 700 degrees...

But since this device is averaging the temperature over the entire length of wire it only sees an average of 398 degrees.... It happy just keeps vaping away.... all the while I'm wondering why it's tasting funny and I'm sucking those same bad things into my lungs that you were insisting would no longer happen..

It just ... doesn't happen that way. I literally have not had a single dry or bad hit since I started using this technology, and I've tried all kinds of stuff. Hot spots don't randomly form that way. At this point you are basically just naysaying; from experience in my opinion this is transcendent technology. And why not, it's literally adding dimensions to its functionality that no other vaping technology operates in. The ability to respond to changing real-world conditions inside the atomizer simply did not exist in vaping until now.

Hey, if you mean yourself, I missed that post and had I known I would have been asking you questions about it ;)

http://www.e-cigarette-forum.com/fo...ohm-latest-vv-vw-devices-15.html#post14339908
 

ukeman

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from experience in my opinion this is transcendent technology. And why not, it's literally adding dimensions to its functionality that no other vaping technology operates in. The ability to respond to changing real-world conditions inside the atomizer simply did not exist in vaping until now.
http://www.e-cigarette-forum.com/fo...ohm-latest-vv-vw-devices-15.html#post14339908
Its taken me (for one) a damn long time to get to being satisfied with my vape; close to 5 years of daily tangling with gear.
I have and sure others too have thought that this industry is, or at least was ( a couple years ago) in its infancy... geez how its bloomed in numbers since '09.

I remember thinking - for sure some day, this is going to be a lot more user friendly, safe, and innovations are going to just take what sometimes feels so primitive (flash light form factor, and wrapping wires around ss mesh dunked in juice lol) up into the modern age, and mostly talking about atomizers as being in need of innovation... its electronic after all.
I was thinking along the lines of wick materials and coils at the time and how much effort and gear it takes to make (build) your atomizer... not like taking a cig out of a box lol.
This could be the start of consistent vapor satisfaction; right off the bat.
 

JeremyR

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The 50- 100w mods have made all the stuff we use to do obsolete. All that work we did to reach a great vape with the technology is now no longer relevant, overall. Now with the DNA 40 temp control it's another jump in technology. With that I should be able to get 200-300 ml on one rayon wick and coil.

The temp control will be awesome. In a year or two when the price comes down I will jump on it. Luckily I know how to work with what I've got and get it vaping great.

Someone had concern that nickel wire was no res so it doesn't heat up. Well it does get hot as heck. I found that out in the past holding the no res to test fire a coil by touching it to +\-. Bunt my finger quick. Just recently in a discussion, in a thread that's even more ancient that 15w mods, you can see nickel glowing. The last 30 posts here are concerning 28-26g no res.
http://www.e-cigarette-forum.com/fo...e-pics-tip-tricks-quirks-88.html#post14203290


This is phenomenal that they have gone this temperature route. I imagine the chips are pretty sophisticated, and can detect resistance to the 100th probably. Controlling the temp by the resistance change of the nickel is really awesome. If it works out it changes everything!

P.s.
I think some of the confusion I had was possibly related to confusing it with The Peukert Law.. I see now that was based mainly on lead acid batteries and amp load. The lithium Ion's don't have the same characteristics.

At any rate now I'm seeing the full picture, thanks for filling in the blanks guys! I was only basing off my particular chips characteristics. And my findings were essentially mod specific only.
 

imsoenthused

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It just ... doesn't happen that way. I literally have not had a single dry or bad hit since I started using this technology, and I've tried all kinds of stuff. Hot spots don't randomly form that way. At this point you are basically just naysaying; from experience in my opinion this is transcendent technology. And why not, it's literally adding dimensions to its functionality that no other vaping technology operates in. The ability to respond to changing real-world conditions inside the atomizer simply did not exist in vaping until now.



http://www.e-cigarette-forum.com/fo...ohm-latest-vv-vw-devices-15.html#post14339908

What's the battery life like? I'm intrigued but I've gotten so used to 26650s that actually last a reasonable portion of the day, and I'm predicting a long wait before we see this new tech in anything but an 18650 form factor.
 

awsum140

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What's the battery life like? I'm intrigued but I've gotten so used to 26650s that actually last a reasonable portion of the day, and I'm predicting a long wait before we see this new tech in anything but an 18650 form factor.

I would conjecture that battery life will not be significantly different than we experience with w VV/VW currently. Even with the increased overhead of additional electronics, which will be in the milliamp or less range, being able to run at maximum efficiency should actually provide more battery life.
 

Smann245

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Wattage/Voltage Regulation does not rely at all on resistance. What it does is that according to Watts and CURRENT BATTERY VOLTAGE it calculates the current to be drawn. Resistance is not in the formula at all.
You have no idea what you're talking about. Voltage divided by resistance = current. Voltage multiplied by current =watts. Apply algebra and you get voltage squared divided by resistance = watts. Please review ohms law and the power formula.
 

skoony

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And then comes the DNA40. You build a coil with NI200 wire just like you did with Kanthal. Only now you are in the .1 to .2 ohm range. You set your temp to 410 to 430 F a temp that most juices vaporize at. When you hit the fire button it pumps the total 9v on the coil to immediately heats it to just below the set temp. The chip then keeps that temp throughout your draw. Dry, wet, long draw, short draw, the temp stays constant and the watts jump all over the place keeping the temp constant. Been beta testing two units for 3 weeks. As far as I am concerned best vapor I have ever had and safest never a dry hit. Won't even burn the cotton dry. This is a new era.:)
water boils at 212 degrees F at sea level. PG at roughly 370 degrees F.
at 430 degrees isn't one actually cooking the juice and creating unwanted
chemical reactions or does the amount of vapor produced temper any actual gas
that may be produced?
regards
mike
 

MattB101

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1:
Um yeah; it is 5 amps going towards the atomizer; there's do confusion there.


2:
Getting 16 volts out of a 4 volt battery does not run down the battery any faster.
What effect the battery running down faster is how much power you draw.
4 volts at 20 amps is the same 80 watts as 16 volts at 5 amps.

3:
2 batteries will last longer than one battery because they contain twice as much energy, whether stacked or parallel.

Batteries in parallel add up Mah, batteries in series add up volts. Higher Mah will generally last longer than higher voltage.

Sent from my Galaxy Note 2 Android phone on a keyboard that waaayyy too small (or my thumbs are waaayyy too big).
 

Aal_

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You have no idea what you're talking about. Voltage divided by resistance = current. Voltage multiplied by current =watts. Apply algebra and you get voltage squared divided by resistance = watts. Please review ohms law and the power formula.

You make me laugh. Please review how dc dc converters work. What you said applies to mechanicals only. With a vw vv device resistance does not affect anything related to how much current is withdrawn from the battery. Zero effect. Not even part of the formula.
 

Rossum

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You make me laugh. Please review how dc dc converters work. What you said applies to mechanicals only. With a vw vv device resistance does not affect anything related to how much current is withdrawn from the battery. Zero effect. Not even part of the formula.
Exactly. Watts In - Converter Losses = Watts Out.

Converter Losses are typically less than 10%.

You can apply Ohm's Law on either side to calculate voltage, current, or resistance from the other two, but you can't apply it across the converter.
 

Rossum

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water boils at 212 degrees F at sea level. PG at roughly 370 degrees F.
at 430 degrees isn't one actually cooking the juice and creating unwanted
chemical reactions or does the amount of vapor produced temper any actual gas
that may be produced?
Do you vape pure PG? Most people don't. And the boiling point of VG is around 550°F.
 

Rossum

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What's the battery life like? I'm intrigued but I've gotten so used to 26650s that actually last a reasonable portion of the day, and I'm predicting a long wait before we see this new tech in anything but an 18650 form factor.
26650s don't make much sense in a regulated mod. Battery tech is most highly developed in the 18650 form factor, meaning you get the best performance to size & weight ratio in that form factor. This is why devices like like the VaporFlask and the BAP mod use dual 18650s, which give you more capacity than a 26650.
 

MattB101

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Do you vape pure PG? Most people don't. And the boiling point of VG is around 550°F.

The recommended temperature setting of the new DNA 40 is 400-420 degrees. They said that the VG starts to break down around 500 degrees if I remember correctly. The device intrigues me and I am seriously considering building a mod around one. The stated price for modders according to the PBusardo vid with the dude from Evolv is 60 dollars. Recommended viewing by the way, very informative. Reasonable. By the time I fininshed an SX350 mod I had about $75 in the circuit boards alone.

Sent from my Galaxy Note 2 Android phone on a keyboard that waaayyy too small (or my thumbs are waaayyy too big).
 
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rusirius

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Batteries in parallel add up Mah, batteries in series add up volts. Higher Mah will generally last longer than higher voltage.

Sent from my Galaxy Note 2 Android phone on a keyboard that waaayyy too small (or my thumbs are waaayyy too big).
Not true... I mean yes, in parallel the capacity adds and in series voltage adds. But it doesn't make one difference of you're running the same power. A 1000mAh battery will run 10amps for 6 minutes no matter what.

If you run a certain wattage at the 4.2 volts of a parallel set of 2 500mAh batteries and that wattage draws 10amps then the battery will last 6 minutes...

If you stack those same two batteries in series they are only 500mAh, but to draw that same exact wattage at double the voltage it will require half the amps, so you're only drawing 5 amps. Which means it'll still run for 6 minutes.

A regular will be more or less efficient at different voltages, so there can be variances, but you're only talking about small percentage of difference
 

Rossum

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The stated price for modders according to the PBusardo vid with the dude from Evolv is 60 dollars. Recommended viewing by the way, very informative. Reasonable. By the time I fininshed an SX350 mod I had about $75 in the circuit boards alone.
$60 is "retail", quantity one. But there are these things on ECF (that only "Verified Members" can see) called "co-ops". They can save you substantial amounts on items like DNA boards. ;)
 
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